CN109887815B - Intelligent molded case circuit breaker and operating method - Google Patents

Abstract

The invention provides an intelligent molded case circuit breaker and an operating method, wherein the intelligent molded case circuit breaker comprises: the intelligent tripping device comprises an upper cover, a middle cover, an operating mechanism, a camera system, a base and an intelligent tripping device; the intelligent release comprises a release cover, an intelligent release circuit board, a release base, a connection row, a power supply transformer, a measurement transformer, a magnetic flux unit and a release transmission reset unit. The advantages are that: (1) The circuit breaker is double-breakpoint structure, and through the design to movable contact and stationary contact in the looks system, has the advantage that the combined floodgate reliability is high, the separating brake is quick to guarantee the performance of circuit breaker. (2) Through the design to intelligent release, including the design to parts such as magnetic flux, rocker, reset piece and mechanism push rod, improve the reliability of circuit breaker divide-shut brake. (3) The intelligent release transformer adopts a double-coil structure, has high current measurement precision, and is favorable for realizing overcurrent release more accurately.

Description

Intelligent molded case circuit breaker and operating method

Technical Field

The invention belongs to the technical field of low-voltage circuit breaker design, and particularly relates to an intelligent molded case circuit breaker and an operating method.

Background

The circuit breaker will be developed towards the direction of intelligent digitization in the future, along with the planning of industrial 4.0 and intelligent manufacturing 2025, the digitization trend of the circuit breaker will be more and more obvious, and the requirements of the power grid on the performance and the functions of the circuit breaker are continuously improved, and the service performance of the existing circuit breaker can not meet the market demand gradually, so that new types of circuit breakers need to be developed according to the continuous change of the market.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides an intelligent molded case circuit breaker and an operating method, which can effectively solve the problems.

The technical scheme adopted by the invention is as follows:

The invention provides an intelligent molded case circuit breaker, comprising: the intelligent tripping device comprises an upper cover (1), a middle cover (2), an operating mechanism (3), a phase system (4), a base (5) and an intelligent tripping device (6);

The phase system (4) is formed by assembling three or four independent poles, and each independent pole comprises an upper fixed contact (4-1), a lower fixed contact (4-2) and a moving contact (4-3); the movable contact (4-3) of the phase system (4) is connected with the operating mechanism (3) through a connecting shaft (4-4), and the phase system (4) and the operating mechanism (3) are combined and then placed into the base (5) for fixation; the intelligent release (6) is placed in the base (5) and is connected with the phase system (4); after the upper cover (1) is buckled to the middle cover (2), the upper cover and the middle cover are buckled to the base (5) together;

The movable contact (4-3) is of a cylindrical structure, the connecting shaft (4-4) is arranged at the center of the movable contact (4-3), and the operating mechanism (3) drives the movable contact (4-3) of the phase system (4) to rotate around the axis through the connecting shaft (4-4); two opposite ends of the movable contact (4-3) respectively form a first movable contact (4-3-1) and a second movable contact (4-3-2); the connecting line of the first movable contact (4-3-1) and the second movable contact (4-3-2) passes through the connecting shaft (4-4); when the movable contact (4-3) rotates to a closing position, at the moment, the first movable contact (4-3-1) and the second movable contact (4-3-2) are both in a horizontal state, the first movable contact (4-3-1) is contacted with the upper fixed contact (4-1) positioned at the upper right, and meanwhile, the second movable contact (4-3-2) is contacted with the lower fixed contact (4-2) positioned at the lower left, so that closing is realized;

When the operating mechanism (3) moves from a closing position to a free tripping position, the operating mechanism (3) drives the moving contact (4-3) of the phase system (4) to reversely rotate around the axis through the connecting shaft (4-4), so that a first moving contact (4-3-1) of the moving contact (4-3) leaves the upper fixed contact (4-1), and a second moving contact (4-3-2) of the moving contact (4-3) leaves the lower fixed contact (4-2), thereby realizing opening;

The intelligent release (6) comprises a release cover (9), an intelligent release circuit board (17), a release base (10), a connecting row (11), a power supply transformer (12), a measuring transformer (13), a magnetic flux unit (16) and a release transmission reset unit; the connecting row (11) is connected in series in the main circuit, the power supply transformer (12) and the measurement transformer (13) are of annular structures, and after the power supply transformer (12) and the measurement transformer (13) are sleeved into the connecting row (11) in sequence, the power supply transformer (12) and the measurement transformer (13) are buckled together; the connecting row (11) is assembled in the release base (10), and the intelligent release circuit board (17) and the magnetic flux unit (16) are also assembled on the release base (10); the output ends of the power supply transformer (12) and the measurement transformer (13) are connected to the input end of the intelligent tripping circuit board (17); the output end of the intelligent tripping circuit board (17) is connected with the magnetic flux (16);

Wherein the magnetic flux unit (16) comprises: a magnetic flux mounting seat (16-1), a magnetic flux housing (16-2), a magnetic flux core (16-3) and a magnetic flux executing piece; the magnetic flux mounting seat (16-1) is provided with a clamping groove matched with the magnetic flux shell (16-2); the magnetic flux shell (16-2) is clamped into the clamping groove, so that the magnetic flux shell (16-2) is fixed; -mounting the magnetic flux actuator inside the magnetic flux housing (16-2); one end of the magnetic flux core (16-3) extends into the magnetic flux housing (16-2) and is connected with the magnetic flux executing piece; the other end of the magnetic flux core (16-3) is positioned outside the magnetic flux housing (16-2); the magnetic flux iron core (16-3) is used for performing linear telescopic motion under the drive of the magnetic flux executing piece; the outer end face head of the magnetic flux iron core (16-3) is integrally formed with a magnetic flux iron core cap (16-4), the magnetic flux iron core cap (16-4) is a round surface, and the diameter of the magnetic flux iron core cap (16-4) is larger than that of the magnetic flux iron core (16-3);

the trip transmission reset unit includes: a rocker (22), a reset piece (23) and a mechanism push rod (24); a rocker mounting groove (22-1) is fixedly arranged on the middle cover (2), and the rocker mounting groove (22-1) is provided with a fan-shaped opening; a rocker rotating shaft (22-2) is fixedly arranged at the bottom of the rocker mounting groove (22-1), the bottom end of the rocker (22) is clamped on the rocker rotating shaft (22-2), so that the rocker (22) can rotate in the range of the fan-shaped opening, and the fan-shaped opening limits the rotation range of the rocker (22);

The mechanism push rod (24) comprises a push rod rotating shaft (24-1), a push rod connecting piece (24-2), a push rod transverse shaft (24-3), a push rod lug (24-4) and a push rod torsion spring (24-5); the push rod connecting piece (24-2), the push rod cross shaft (24-3) and the push rod convex block (24-4) are of an integrated structure, and the push rod convex block (24-4) is fixed on the push rod cross shaft (24-3); the bottom of the push rod connecting piece (24-2) is fixed on the push rod cross shaft (24-3), the top of the push rod connecting piece (24-2) is mounted on the push rod rotating shaft (24-1), the push rod torsion spring (24-5) is used for applying torsion force to the mechanism push rod (24) in a closing direction, and when no external force acts, the mechanism push rod (24) rotates to a closing position under the action of the tension force of the push rod torsion spring (24-5);

the reset piece (23) is arranged on the operating mechanism (3) through a reset piece rotating shaft (23-1); the operating mechanism (3) is provided with an operating mechanism rotating shaft (3-1); the reset transmission piece (23-2) can rotate around the operating mechanism rotating shaft (3-1), and the reset transmission piece (23-2) is fixed with the handle; when the handle rotates anticlockwise under manual condition, the reset piece (23) is pushed to move through the reset transmission piece (23-2).

Preferably, an exhaust channel (10-1) communicated with the arc spraying port is arranged at the bottom of the release base (10), the front end of the exhaust channel (10-1) is an air inlet, the rear end of the exhaust channel is an air outlet, and the side part of the exhaust channel (10-1) is of a closed structure.

Preferably, the device further comprises a leakage protection module; the electric leakage protection module comprises an electric leakage push rod (15) and an air blowing push rod (25);

the electric leakage push rod (15) is assembled in an electric leakage push rod mounting groove (15-1) of the release base (10); the electric leakage push rod (15) can move forwards or backwards along the electric leakage push rod mounting groove (15-1); the air blowing push rod (25) is rotatably connected around an air blowing push rod shaft (25-1); the air blowing push rod (25) is arranged between the electric leakage push rod (15) and the mechanism push rod (24).

Preferably, the device also comprises a shunt release (20) and an electric operating mechanism (21);

The electric operating mechanism (21) is connected in series with a first built-in relay; when the first built-in relay is closed, the electric operating mechanism (21) is electrically started; the electric operating mechanism (21) drives the operating mechanism (3) to rotate so as to realize switching-on;

the shunt release (20) is connected in series with a second built-in relay; when the second built-in relay is closed, the shunt release (20) is sucked, and the shunt release (20) drives a brake separating traction rod of the circuit breaker to act when being sucked, so that the brake separating of the circuit breaker is realized;

the first built-in relay and the second built-in relay are integrated in the intelligent release (6).

The invention also provides an operating method of the intelligent molded case circuit breaker, which comprises the following three operating modes:

first kind: the overcurrent trip operation mode comprises the following steps:

The connection row (11) of the intelligent release (6) is connected in series in the main circuit, and the connection row (11) passes through the current in the main circuit;

when working current passes through the main circuit, the power supply transformer (12) induces voltage and provides the voltage for the intelligent tripping circuit board (17), so that the intelligent tripping circuit board (17) is electrified;

after the intelligent tripping circuit board (17) is powered on, the current value detected by the measuring transformer (13) and passing through the connecting row (11) is received, the intelligent tripping circuit board (17) judges whether the current value exceeds a set specified value, and if so, the intelligent tripping circuit board (17) triggers the intelligent tripping device (6) to act, so that an overcurrent tripping protection function is realized;

second kind: the leakage protection tripping operation mode comprises the following steps:

Step 2, when the electric leakage detection module detects that the main circuit has electric leakage faults, the electric leakage detection module triggers an executing mechanism to act, the executing mechanism pushes an electric leakage push rod (15) to move forwards, and the electric leakage push rod (15) moves forwards to reach the limit position due to the limit effect of an electric leakage push rod mounting groove (15-1); wherein, in the process of the forward movement of the electric leakage push rod (15), the top end of the electric leakage push rod (15) pushes the air blowing push rod (25) to rotate clockwise around the air blowing push rod shaft (25-1); when the air blowing push rod (25) rotates clockwise, the push rod (24) of the top pushing mechanism of the air blowing push rod (25) rotates anticlockwise around the push rod rotating shaft (24-1); when the mechanism push rod (24) rotates anticlockwise, the limiting function on the operating mechanism (3) is released, and the operating mechanism (3) is released, so that the operating mechanism (3) rotates from a closing position to a free tripping position under the action of the tension of an operating mechanism spring, namely: the operating mechanism (3) drives the moving contact (4-3) of the phase system (4) to rotate around the axis through the connecting shaft (4-4), so that the first moving contact (4-3-1) of the moving contact (4-3) is separated from the upper fixed contact (4-1), and the second moving contact (4-3-2) of the moving contact (4-3) is separated from the lower fixed contact (4-2), thereby realizing the trip and opening;

Third kind: a remote manipulation method, comprising:

The master controller is a remote controller, when a remote control switch-on is needed, the master controller enables the first built-in relay to be closed through a remote instruction, and when the first built-in relay is closed, the electric operating mechanism (21) is electrically started; the electric operating mechanism (21) drives the operating mechanism (3) to rotate so as to realize closing;

When the remote control brake opening is needed, the master controller enables the second built-in relay to be closed through a remote instruction, and when the second built-in relay is closed, the shunt release (20) is attracted; and when the shunt release (20) is sucked, the shunt release drives a brake separating traction rod of the circuit breaker to act, so that the operating mechanism (3) is driven to rotate, and the brake separation of the circuit breaker is realized.

Preferably, in the overcurrent trip operation mode, the intelligent trip circuit board (17) triggers the intelligent trip (6) to act, thereby realizing the overcurrent trip protection function, and specifically comprising the following steps:

Step 1, an intelligent tripping circuit board (17) sends a voltage signal to a magnetic flux unit (16) to trigger the action of the intelligent tripping circuit board, a magnetic flux iron core (16-3) of the magnetic flux unit (16) moves forwards, a magnetic flux iron core cap (16-4) of the magnetic flux iron core (16-3) contacts and pushes a rocker (22) to rotate clockwise, and the rocker (22) is enabled to rotate from the left end to the right end of the fan-shaped opening;

During the clockwise rotation of the rocker (22), the push rod (24) of the pushing mechanism overcomes the force of the push rod torsion spring (24-5) and rotates anticlockwise around the push rod rotating shaft (24-1); when the mechanism push rod (24) rotates anticlockwise, the limiting effect on the operating mechanism (3) is released, so that the operating mechanism (3) rotates from a closing position to a free tripping position under the action of the tension of an operating mechanism spring, and free tripping is realized;

Step 2, when reset after release, the handle of the operating mechanism (3) rotates anticlockwise under the manual condition; when the handle of the operating mechanism (3) rotates anticlockwise, the reset piece (23) is pushed to rotate clockwise around the reset piece rotating shaft (23-1) through the reset transmission piece (23-2), and in the rotating process of the reset piece (23), the reset piece (23) pushes the rocker (22) to rotate anticlockwise, so that the rocker (22) rotates from the right end to the left end of the fan-shaped opening; when the rocker (22) rotates anticlockwise, on one hand, the rocker (22) pushes the magnetic flux iron core (16-3) of the magnetic flux unit (16) to move backwards, and then the magnetic flux iron core (16-3) is contracted inwards to the magnetic flux shell (16-2) until the magnetic flux iron core (16-3) reaches a reset position; on the other hand, when the rocker (22) rotates anticlockwise, the mechanism push rod (24) is separated, and the mechanism push rod (24) rotates clockwise under the torsion action of the push rod torsion spring (24-5) to realize reset after release.

The intelligent molded case circuit breaker and the operating method thereof provided by the invention have the following advantages:

(1) The circuit breaker is double-breakpoint structure, and through the design to movable contact and stationary contact in the looks system, has the advantage that the combined floodgate reliability is high, the separating brake is quick to guarantee the performance of circuit breaker.

(2) Through the design to intelligent release, including the design to parts such as magnetic flux, rocker, reset piece and mechanism push rod, improve the reliability of circuit breaker divide-shut brake.

(3) The intelligent release transformer adopts a double-coil structure, has high current measurement precision, and is favorable for realizing overcurrent release more accurately.

(4) And a leakage protection module is added, so that a leakage protection function can be realized through a leakage push rod.

Drawings

Fig. 1 is an exploded view of an intelligent molded case circuit breaker according to the present invention;

fig. 2 is a block diagram of an operating mechanism for realizing opening and closing according to the present invention;

FIG. 3 is a schematic diagram of an operating mechanism driving a moving contact to rotate;

Fig. 4 is a schematic diagram of an electromagnetic trip and a leakage protection trip provided by the present invention;

FIG. 5 is a schematic diagram of an electromagnetic trip provided by the present invention;

fig. 6 is a state diagram of the electromagnetic trip provided by the present invention;

FIG. 7 is a state diagram of the electromagnetic reset provided by the invention;

fig. 8 is an exploded view of the intelligent trip provided by the present invention;

FIG. 9 is a front view of the intelligent trip unit provided by the present invention;

Fig. 10 is a rear view of the intelligent trip provided by the present invention;

FIG. 11 is a schematic illustration of an exhaust channel formed by a trip unit base communicating with a spray arc port;

FIG. 12 is a view of the magnetic flux mount in a set position on the trip unit base;

FIG. 13 is a block diagram of a magnetic flux mount;

FIG. 14 is a diagram of an installation of a flux unit in a flux mount;

fig. 15 is a schematic diagram of the operation of electromagnetic trip;

fig. 16 is a schematic diagram of the operation of electromagnetic trip;

fig. 17 is a schematic diagram of the operation of electromagnetic trip;

Fig. 18 is a schematic diagram of the operation of electromagnetic trip;

FIG. 19 is a diagram of the positional relationship of the rocker, reset member and mechanism push rod;

FIG. 20 is a bottom view of the rocker mounting;

FIG. 21 is a block diagram of a mechanism pushrod;

FIG. 22 is a block diagram of a rocker;

FIG. 23 is a block diagram of a reset element;

FIG. 24 is a schematic diagram of a leakage protection trip;

Fig. 25 is a schematic diagram of a leakage protection trip;

FIG. 26 is an interchange configuration diagram of an intelligent release and a thermo-magnetic release;

FIG. 27 is a block diagram of a shunt release;

Fig. 28 is a structural view of the electric operating mechanism.

Wherein: 1. the hydraulic power generation device comprises an upper cover, a middle cover, a 3 operating mechanism, a 3-1 operating mechanism rotating shaft, a 4-phase system, a 4-1 upper static contact, a 4-2 lower static contact, a 4-3 moving contact, a 4-3-1 moving contact, a 4-3-2 moving contact, a 4-4 second moving contact, a connecting shaft, a 5 base, a 6 intelligent release, a 7-release upper cover, a 8.N pole cover, a 9-release cover, a 10-release base, a 10-1 exhaust channel, a 11 connecting row, a 12-supply transformer, a 13-measuring transformer, a 14-baffle, a 15-leakage push rod, a 15-1 leakage push rod mounting groove, a 16-magnetic flux unit, a 16-1 magnetic flux mounting seat, a 16-2 magnetic flux housing, a 16-3 magnetic flux core, a 16-4 magnetic flux core, a 17 intelligent release circuit board, a 18-thermal magnetic release, a 19-auxiliary switch, a 20 shunt release, a 21-electric operating mechanism, a 22-rocker arm, a 22-1, a 22-rocker arm, a 22-2, a reset member, a 23-reset member, a 24-push rod, a 24-reset member, a 24 and a push rod.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The invention provides an intelligent molded case circuit breaker, which has the following design characteristics:

(1) The double-breakpoint circuit breaker can be installed in a modularized mode, has a communication function, can achieve intelligent man-machine interconnection, is particularly designed for an intelligent release, and can increase breaking reliability during magnetic flux release.

The invention is characterized in that the high breaking is achieved, meanwhile, the intelligent release 6 has the protection selectivity, the remote control, remote adjustment, remote measurement and remote signaling can be realized, the remote opening and closing operation of the circuit breaker can be realized through the built-in relay function, in addition, the circuit breaker can be interconnected with a computer or a mobile phone after being connected in a data line, bluetooth, wireless network and other modes, and the inquiry of the setting condition of the circuit breaker and the parameter condition of current and voltage in a circuit can be realized.

(2) The intelligent release 6 is fixedly connected with the phase system 4 through the connecting row 11 and is accommodated in the base 5, the operating mechanism 3 is connected with the phase system 4 through a connecting shaft, the intelligent release 6 is of a module structure and is installed on the base 5, the intelligent release 6 is fixedly connected with the phase system 4 through the connecting row 11 as a protection unit, and the thermomagnetic release 18 can be exchanged with the intelligent release 6 and is installed at the same position in the same mode.

(3) An object of the present invention is to provide a molded case circuit breaker with an intelligent controller, which can realize functions of remote control, remote regulation, remote measurement, remote signaling, etc. by controlling accessories such as a shunt release 20, an electric operating mechanism 21, etc. by a relay built in the controller.

Not only is the following: when a switching-on instruction is input through a human-computer interface, the controller can close a built-in relay connected in series with the electric operating mechanism 21, so that the electric operating mechanism 21 is started to control a breaker handle to realize switching-on, and when switching-off is needed, the human-computer interface can give a switching-off instruction to the controller, and at the moment, the built-in relay connected in series with the shunt release 20 can be closed, so that the shunt release 20 is controlled to be attracted, and when the shunt release is attracted, a switching-off traction rod of the breaker is driven to act, so that the breaking of the breaker is realized. Through the human-computer interface, the current parameter display can be performed by utilizing the mutual inductor measurement function of the controller, and the communication with the controller can be realized.

Specifically, referring to fig. 1, the intelligent molded case circuit breaker provided by the invention comprises: upper cover 1, well lid 2, operating device 3, looks system 4, base 5, intelligent release 6, electric leakage protection module, shunt release 20 scheduling structure. The following details of the phase system 4, the operating mechanism 3, the intelligent release 6, the leakage protection module, and the shunt release 20 are respectively described in detail:

Phase system 4 and operating mechanism 3

The phase system 4 is formed by assembling three or four independent poles, and referring to fig. 2 and 3, each independent pole comprises an upper fixed contact 4-1, a lower fixed contact 4-2 and a moving contact 4-3; the moving contact 4-3 of the phase system 4 is connected with the operating mechanism 3 through a connecting shaft 4-4, and the phase system 4 and the operating mechanism 3 are combined and then placed into the base 5 for fixation; the intelligent release 6 is placed in the base 5 and is connected with the phase system 4 in a screw fastening mode; after the upper cover 1 is buckled to the middle cover 2, the upper cover is buckled to the upper surface of the base 5;

wherein, the moving contact 4-3 is in a cylindrical structure, the center of the moving contact 4-3 is provided with a connecting shaft 4-4, and the operating mechanism 3 drives the moving contact 4-3 of the phase system 4 to rotate around the axis through the connecting shaft 4-4; the two opposite ends of the movable contact 4-3 respectively form a first movable contact 4-3-1 and a second movable contact 4-3-2; the connection line of the first movable contact 4-3-1 and the second movable contact 4-3-2 passes through the connecting shaft 4-4; when the movable contact 4-3 rotates to a closing position, at this time, the first movable contact 4-3-1 and the second movable contact 4-3-2 are both in a horizontal state, the first movable contact 4-3-1 is contacted with the upper fixed contact 4-1 positioned at the upper right, and meanwhile, the second movable contact 4-3-2 is contacted with the lower fixed contact 4-2 positioned at the lower left, so that closing is realized;

When the operating mechanism 3 moves from the closing position to the free tripping position, the operating mechanism 3 drives the moving contact 4-3 of the phase system 4 to reversely rotate around the axis through the connecting shaft 4-4, so that the first moving contact 4-3-1 of the moving contact 4-3 leaves the upper fixed contact 4-1, and the second moving contact 4-3-2 of the moving contact 4-3 leaves the lower fixed contact 4-2, thereby realizing the opening of the switch;

The specific action structure is shown in fig. 7, when the operating mechanism 3 is manually operated, the operating mechanism is firstly pulled from a free tripping state to a rebuckling state, at the moment, the breaker is ready for switching on and switching on current, then, as shown in fig. 6, the handle is pulled to a switching on state, in the process, the operating mechanism 3 acts to drive the connecting shaft 4-4, the connecting shaft 4-4 drives the moving contact 4-3 in the phase system to rotate around the axis to realize switching on operation, the first moving contact 4-3-1 is contacted with the upper fixed contact 4-1 positioned at the upper right, and meanwhile, the second moving contact 4-3-2 is contacted with the lower fixed contact 4-2 positioned at the lower left, so that switching on is realized; the opening process is opposite to the closing process, when the handle is pulled to the opening process, the operating mechanism 3 can drive the connecting shaft 4-4 and the moving contact in the phase system to rotate anticlockwise, so that a loop is disconnected, and the opening operation is realized.

The phase system provided by the invention adopts a structural form that two pairs of upper fixed contacts 4-1 and lower fixed contacts 4-2 are arranged at the left and right sides, and a moving contact 4-3 is arranged at the central position, and the design has the advantages that: when switching from opening to closing, the moving contact 4-3 rotates anticlockwise, a larger rotating force can be applied, namely the first moving contact 4-3-1 of the moving contact 4-3 can be reliably contacted with the upper fixed contact 4-1, and the second moving contact 4-3-2 of the moving contact 4-3 can be reliably contacted with the lower fixed contact 4-2; when the switch-off is needed, the first movable contact 4-3-1 of the movable contact 4-3 can be quickly separated from the upper fixed contact 4-1 by rotating the movable contact 4-3 clockwise by a small angle, and the second movable contact 4-3-2 of the movable contact 4-3 can be quickly separated from the lower fixed contact 4-2, so that the switch-on and switch-off device has the advantages of high switch-on reliability and quick switch-off, and the usability of the circuit breaker is ensured.

(II) Intelligent release 6

The intelligent release 6 is an execution unit of a circuit breaker protection function, and when the intelligent release 6 detects a fault to protect, the magnetic flux unit 16 is triggered, so that the operating mechanism 3 is triggered to release, and the operating mechanism 3 drives the moving contact to rotate to realize the opening operation.

Referring to fig. 8, 9 and 10, the intelligent release 6 includes a release cover 9, an intelligent release circuit board 17, a release base 10, a connection row 11, a power supply transformer 12, a measurement transformer 13, a magnetic flux unit 16 and a release transmission reset unit;

The connection row 11 is connected in series in a main circuit, the power supply transformer 12 and the measurement transformer 13 are of annular structures, coils are arranged in the power supply transformer 12 and the measurement transformer 13, the power supply transformer 12 is used for supplying power to the intelligent tripping circuit board 17 and consists of iron core coils, the measurement transformer 13 is used for measuring current of the main circuit and consists of hollow mutual inductance coils. Each coil is integrated within a respective transformer in a tight fit manner. After the annular centers of the power supply transformer 12 and the measuring transformer 13 are sleeved into the connecting row 11 in sequence, the power supply transformer 12 and the measuring transformer 13 are buckled together by utilizing the buckles at the edges of the transformers. The unique design of the double coils can improve the reliability of the electricity utilization of the controller. The accuracy of current measurement is improved, and guarantee is provided for the accurate protection of this design.

The connecting row 11 is assembled in the release base 10, and an intelligent release circuit board 17 and a magnetic flux unit 16 are also assembled on the release base 10; the output ends of the power supply transformer 12 and the measurement transformer 13 are connected to the input end of the intelligent tripping circuit board 17; the output end of the intelligent tripping circuit board 17 is connected with the magnetic flux unit 16;

Wherein the magnetic flux unit 16 includes: a magnetic flux mount 16-1, a magnetic flux housing 16-2, a magnetic flux core 16-3, and a magnetic flux actuator; as shown in fig. 13 and 14, the flux mount 16-1 has a slot that mates with the flux housing 16-2; the clamping groove has a snap-in function, the magnetic flux housing 16-2 is clamped into the clamping groove from the upper surface of the groove, and the magnetic flux housing is fixed through a snap-in structure after being installed, so that the magnetic flux housing 16-2 is fixed; after the magnetic flux housing 16-2 is fixed, the triggering function is realized by the back and forth reciprocating motion of the iron core in the magnetic flux housing 16-2 along the axial direction. The interior of the flux housing 16-2 mounts the flux actuator; one end of the magnetic flux core 16-3 extends into the magnetic flux housing 16-2 to be connected with the magnetic flux actuator; the other end of the flux core 16-3 is located outside the flux housing 16-2; the magnetic flux iron core 16-3 is used for performing linear telescopic motion under the drive of the magnetic flux executing piece; the outer end face head of the magnetic flux core 16-3 is integrally formed with a magnetic flux core cap 16-4, the magnetic flux core cap 16-4 is a round surface, and the diameter of the magnetic flux core cap 16-4 is larger than that of the magnetic flux core 16-3; the magnetic flux core cap 16-4 with the head-mounted round surface design of the magnetic flux core has the functions of: in order to reliably push the rocker to move, the cylindrical surface of the rocker has a larger radius, so that the magnetic flux iron core can reliably push the rocker to move when the rocker is displaced to some extent, and the tripping reliability is ensured.

Referring to fig. 4, 5, 15, 16, 17, 18, and 19, the trip transmission reset unit includes: rocker 22, reset piece 23 and mechanism push rod 24;

As shown in fig. 20, a rocker mounting groove 22-1 is fixedly installed on the middle cover 2, and the rocker mounting groove 22-1 has a fan-shaped opening; a rocker rotating shaft 22-2 is fixedly arranged at the bottom of the rocker mounting groove 22-1, the bottom end of the rocker 22 is clamped on the rocker rotating shaft 22-2, so that the rocker 22 can rotate in the range of a fan-shaped opening, and the fan-shaped opening limits the rotating range of the rocker 22; fig. 22 is a structural view of the rocker. Fitting rocker 22 into the fan-shaped opening rocker mounting groove 22-1 has the following advantages: the two limit positions of the rotation of the rocker 22 are directly limited through the fan-shaped opening, so that the rocker 22 can rotate in a required range without additionally arranging other limiting parts, and the system structure is simplified.

As shown in FIG. 21, the mechanism pushrod 24 includes a pushrod rotational shaft 24-1, pushrod connectors 24-2, pushrod lateral shafts 24-3, pushrod bumps 24-4, and pushrod torsion springs 24-5; the push rod connecting piece 24-2, the push rod cross shaft 24-3 and the push rod convex block 24-4 are of an integrated structure, and the push rod convex block 24-4 is fixed on the push rod cross shaft 24-3; the bottom of the push rod connecting piece 24-2 is fixed on the push rod cross shaft 24-3, the top of the push rod connecting piece 24-2 is arranged on the push rod rotating shaft 24-1, the push rod torsion spring 24-5 is used for applying torsion force to the mechanism push rod 24 in the closing direction, and when no external force acts, the mechanism push rod 24 rotates to the closing position under the action of the torsion force of the push rod torsion spring 24-5; when the switch-on is needed, under the thrust action of magnetic flux, the rocker 22 rotates from the left side to the right side in the fan-shaped opening, and in the rotating process of the rocker 22, as shown in fig. 19, the convex plane of the rocker 22 is clamped on the push rod convex block 24-4 of the mechanism push rod 24, and through the cooperation of the two, on one hand, the contact area is larger, so that even if the mechanism push rod 24 or the rocker 22 has a certain assembly error, the reliable contact between the rocker 22 and the mechanism push rod 24 can be ensured, and the reliable switch-off operation is realized. On the other hand, the convex plane of the rocker 22 is clamped on the push rod convex block 24-4 of the mechanism push rod 24, and in the process that the rocker 22 pushes the mechanism push rod 24, the rotating track of the rocker 22 can be corrected and limited, so that the rocker 22 reliably rotates to the other end of the fan-shaped opening, and the reliability of opening operation is ensured.

As shown in fig. 23, the restoring member 23 is mounted to the operating mechanism 3 through a restoring member rotating shaft 23-1; the operating mechanism 3 is provided with an operating mechanism rotating shaft 3-1; the reset transmission piece 23-2 can rotate around the operating mechanism rotating shaft 3-1, and the reset transmission piece 23-2 is fixed with the handle; when the handle is rotated counterclockwise under manual conditions, the reset member 23 is pushed to move by the reset transmission member 23-2. In the invention, the reset piece 23 for resetting is specially designed, and the reset piece 23 is directly linked with the operating mechanism, and the reset piece 23 is driven to rotate by the operating mechanism to realize resetting, so that the reliability of resetting is high.

Therefore, the rocker 22 is used as a middle transmission part, the semicircular opening at the lower end is clamped on the positioning shaft in the mounting groove of the middle cover, and the inner structure of the mounting groove is also made into a fan-shaped structure besides the positioning shaft, so that the rocker 22 rotates in an angle in the groove by taking the mounting shaft as the center. When the tripping is triggered, the rocker rotates clockwise around the axial direction, and the push rod of the pushing mechanism moves, so that the mechanism is tripped. When resetting, the rocker acts as a transmission member to transmit the motion of the resetting member to the magnetic flux iron core to reset the magnetic flux iron core. The contact surface of the rocker and the magnetic flux is designed into an arc shape, so that the magnetic flux and the rocker can reliably contact no matter in a trigger position or a reset position, the stress is vertical to the arc direction, the interference is reduced to the greatest extent, and the friction is reduced. The contact surface between the rocker and the reset piece adopts a square plane, and even if the reset piece displaces, the normal contact can be ensured and the reset piece can be pushed to act.

The reset piece 23 rivets to the mechanism through a riveting pin, the reset piece 23 rotates in a certain angle by taking the riveting pin as an axis, and only plays a role in the process of resetting magnetic flux, when the reset piece resets, the handle rotates anticlockwise under the manual condition, the reset piece rotates anticlockwise under the pushing of the handle, and in the rotating process, the reset piece can push the rocker to rotate anticlockwise, so that the rocker pushes the magnetic flux iron core to move towards the direction close to the magnetic flux shell until the magnetic flux iron core reaches the reset position.

The working principle of the intelligent release 6 is as follows:

The protection implementation of the circuit breaker is formed by a series of elements driven by the intelligent release 6 to act, and the specific implementation process is as follows: the intelligent release 6 is a core unit for implementing protection and control of the circuit breaker, the current is connected with a main circuit through a connection row 11, the transformer is divided into a power supply transformer 12 and a measurement transformer 13, when a certain large current passes through the main circuit, the power supply transformer 12 induces voltage and provides the voltage to the intelligent release circuit board 17 for working, after the intelligent release circuit board 17 works, the measurement transformer 13 measures the current passing through the connection row 11 based on the induction principle, if the current exceeds a set specified value, the intelligent release 6 triggers the magnetic flux unit 16 to implement tripping operation on the circuit breaker, the load is forcibly disconnected, and therefore the purpose of protecting the load is achieved.

The handle of the circuit breaker is pulled from the free tripping position to the rebuckling position, in the process, the handle can push the reset piece 23 to rotate, and the reset piece 23 drives the rocker 22 to rotate backwards when rotating, so that the magnetic flux unit 16 is pushed to reset, and the preparation work of next protection is carried out. At this time, the circuit breaker is still in the opening position, and the circuit is not communicated with and charged with loop current. The handle of the circuit breaker is pulled to a closing position, the circuit breaker enters a working state, and at the moment, the intelligent release 6 starts to monitor the current in the circuit and protects the circuit. If the measuring transformer 13 detects abnormal current in the circuit in the switching-on running state of the circuit breaker, an abnormal signal is given to the intelligent tripping circuit board 17 of the intelligent tripping device 6, the intelligent tripping circuit board 17 triggers the action of the intelligent tripping circuit board for a voltage signal of the magnetic flux unit 16, after the magnetic flux unit 16 is triggered, the rocker 22 is pushed to move forwards, and in the moving process of the rocker 22, the operating mechanism 3 is released through the mechanism push rod 24, so that the circuit breaker is opened, the circuit is protected, and the circuit safety is guaranteed.

The intelligent release has the following design characteristics:

The power supply transformer and the measuring transformer can form a whole in a buckling manner. The arrangement of the two transformers can improve the measurement accuracy of the circuit current. Two mutual inductors can be sleeved at the middle bending position of the connecting row 11, the connecting row and the mutual inductors are together arranged in the release base 10 and fixed through the baffle 14, the magnetic flux unit 16 is contained in a mounting groove above the release base 10, the leakage push rod 15 is inserted and mounted from an opening groove at the back of the release base 10, the leakage push rod is limited in the mounting groove through the release cover 9 to do back-and-forth reciprocating motion, the intelligent release circuit board 17 is mounted in the release cover 9, and the intelligent release circuit board is mounted on the release base 10 in a buckling manner. The transformer and flux unit 16 may be connected to the intelligent trip circuit board 17 through terminals of wires.

The intelligent tripping circuit board 17 can further integrate a communication module, can be connected with the outside through a terminal plug, can realize a communication function after being connected with the intelligent tripping device 6 through a computer program, a mobile phone application and the like, and an external accessory can be connected with the relay contact only through the terminal plug by the intelligent tripping circuit board 17 after being built in the relay contact, and can realize the control of the external accessory by controlling the opening and closing of the relay contact through the communication connection, thereby realizing remote operations such as re-buckling, opening and closing.

In addition, referring to fig. 9 and 11, an exhaust passage 10-1 communicating with the arc spraying port is provided at the bottom of the trip unit base 10, the front end of the exhaust passage 10-1 is an air inlet, the rear end is an air outlet, and the side of the exhaust passage 10-1 is a closed structure.

In the prior art, the release base 10 is of a lower opening type, and is not closed, and after the circuit breaker is broken due to a short circuit fault, a large amount of gas leaks from the bottom, and in addition, the release base 10 is forced to move upwards by huge air pressure, so that the release base 10 may be broken or other parts may be damaged. The invention is effectively improved in this aspect, the bottom of the release base 10 is sealed, the bottom of the release base 10 is provided with an air guide structure, and a sealing treatment is adopted and is designed into a cavity mode, so that the bottom becomes an air generating channel, the pressure of air generated by the base is the same to the upper and lower pressure of air generated by the base, acting force is not generated on the release base 10 as a whole, the pressure of air sprayed in the phase system 4 can be uniformly distributed, and the pressure is prevented from being concentrated upwards to damage the intelligent release 6. Thus avoiding stress damage to the trip unit base 10.

The trip unit base 10 is another part for carrying a controller, for example, a mounting groove is formed above the trip unit base 10, a magnetic flux unit is accommodated, and the magnetic flux unit 16 can be mounted in the groove in a tight fit manner. After the controller module is installed in the release base 10, the controller module is integrally placed in the base 5 of the product, the connecting row is connected with the fixed contact of the phase system by means of screw fastening, the front end of the controller module is assembled adjacently with the breaker body after the controller module is assembled, in order to prevent accidental leakage of an electric arc in the breaking process of the body, the baffle 14 is additionally arranged at the front end of the release base 10, the function of protecting a power supply transformer and a measuring transformer can be achieved, and the controller module can also serve as the connecting row 11 to provide support.

(III) leakage protection module

The invention also provides a leakage protection function, and the product can realize the leakage protection function by installing the leakage module below the circuit breaker, the leakage protection module triggers the actuating mechanism after detecting the leakage, and the actuating mechanism drives the leakage push rod assembled in the intelligent release 6 to move, so that the circuit breaker is opened, and the protection function of a circuit is realized.

Referring to fig. 25, the earth leakage protection module includes an earth leakage push rod 15 and an air blowing push rod 25;

The electric leakage push rod 15 is assembled in the electric leakage push rod mounting groove 15-1 of the release base 10; the electric leakage push rod 15 can move forwards or backwards along the electric leakage push rod mounting groove 15-1; the air blowing push rod 25 is rotatably connected around an air blowing push rod shaft 25-1; the air-blowing push rod 25 is installed between the leakage push rod 15 and the mechanism push rod 24.

Specifically, the electric leakage push rod 15 is installed in the installation groove of the release base 10, is inserted into the release base 10 from the back, and can only reciprocate back and forth through the limiting action of one groove and two ribs, and after the release cover 9 is covered, the electric leakage push rod 15 is limited to the release base 10 to prevent falling.

The function of the electric leakage push rod 15 is to implement electric leakage protection to the circuit breaker when the electric leakage module is installed, the electric leakage push rod 5 is pushed to act through the executing mechanism of the electric leakage module, the electric leakage push rod 15 can push the air blowing push rod, and the air blowing push rod drives the mechanism push rod to act, so that the circuit breaker is separated.

Therefore, the circuit breaker is additionally provided with the leakage protection module, and the breaking operation of the circuit breaker can be realized through the leakage push rod, so that the protection function is realized. The implementation method of the leakage protection comprises the following steps: when the electric leakage module in operation detects the electric leakage fault, the electric leakage module triggers an executing mechanism to act, the executing mechanism can push an electric leakage push rod 15 to move, the electric leakage push rod 15 drives an air blowing push rod 25 to move forwards, the air blowing push rod 25 drives a mechanism push rod 24, and accordingly the operating mechanism 3 is released to drive a circuit breaker to be disconnected, and a circuit and personal safety are protected.

(IV) shunt release 20 and electric operating mechanism 21

The shunt release device also comprises a shunt release 20 and an electric operating mechanism 21; referring to fig. 27 and 28, the electric actuator 21 is connected in series with a first built-in relay; when the first built-in relay is closed, the electric operating mechanism 21 is electrically started; the electric operating mechanism 21 drives the operating mechanism 3 to rotate so as to realize closing; shunt release 20 is connected in series with a second built-in relay; when the second built-in relay is closed, the shunt release 20 is sucked, and the shunt release 20 drives a brake separating traction rod of the circuit breaker to act when being sucked, so that the brake separating of the circuit breaker is realized; the first built-in relay and the second built-in relay are both integrated within the intelligent release 6.

In one use example of the invention, the circuit breaker can realize four remote control operations of remote control, remote regulation, remote signaling and remote measurement on a product in a remote communication mode by installing communication connection, a shunt release 20 and an auxiliary switch are installed in a body accessory groove of the product, after an electric operating mechanism 21 is installed on the upper part of the product, remote control closing of the switch can be realized through a remote communication function, opening operation can realize remote setting of long delay, instantaneous and other protection parameters of the product through the remote regulation function, the intelligent release 6 can be matched with a magnetic flux unit 16 to verify the release curve of the intelligent release 6, the communication function can also be utilized to carry out closing test operation on the product through the electric operating mechanism 21 according to use requirements, and the opening and closing states of the product can also be identified through the auxiliary switch, and opening test operation on the product through the shunt release 20 can be realized.

In one use example of the invention, the circuit breaker is connected through installing communication, installing accessories such as the shunt release 20 and the electric operating mechanism 21, etc., realize remote communication and remote control opening and closing operation, through developing the computer software, the cell-phone application energy mode, can use the computer or cell-phone to implement operations such as communication, opening and closing and trip curve check, etc. to the circuit breaker, the realization mode is that connect with the intelligent release 6 through the data line, can also connect through modes such as the network, bluetooth, etc., establish communication connection with the intelligent release 6 through the computer software, cell-phone application, etc. after connection, through the operation in the software, can realize the simulated tripping of the circuit breaker, when checking the delay curve, only need to input certain analog current, after certain delay time, the circuit breaker will break, utilize the time in the simulated time and trip curve of testing to compare, the accuracy of the action time when the circuit breaker actually operates can be estimated; in addition, through the remote control function of software, the operation such as switching on, breaking, remote control and the like of the circuit breaker can be realized by utilizing communication.

In the implementation process of the product, most parts of the body part are shared in consideration of the common development of the thermomagnetic type and the intelligent type product, so that the product can be quickly converted and upgraded in a modularized design concept, and referring to fig. 26, if a consumer uses the thermomagnetic type circuit breaker product, the consumer wants to update the product, the consumer uses the more advanced intelligent type product, and the consumer only needs to detach the upper cover of the product to perfectly switch the thermomagnetic release and the intelligent release 6, so that the quick replacement can be realized without removing other redundant parts, and considerable convenience is provided for the use of the consumer.

The invention also provides an operating method of the intelligent molded case circuit breaker, which comprises the following three operating modes:

first kind: the overcurrent trip operation mode comprises the following steps:

the connection row 11 of the intelligent release 6 is connected in series in the main circuit, and the connection row 11 passes through the current in the main circuit;

when working current passes through the main circuit, the power supply transformer 12 induces voltage and provides the voltage to the intelligent tripping circuit board 17, so that the intelligent tripping circuit board 17 is electrified to work;

After the intelligent tripping circuit board 17 is electrified to work, the current value detected by the measurement transformer 13 and passing through the connection row 11 is received, the intelligent tripping circuit board 17 judges whether the current value exceeds a set specified value, and if so, the intelligent tripping circuit board 17 triggers the intelligent tripping device 6 to act, so that an overcurrent tripping protection function is realized;

As can be seen from the above, when the current in the main circuit is small or no current exists, the intelligent trip circuit board 17 does not operate in power-on; only when the current in the main circuit is 20% greater than the normal value, the intelligent tripping circuit board 17 can be electrified, so that the energy consumption of the intelligent tripping circuit board 17 can be reduced, and the energy source is saved.

In the overcurrent trip operation mode, the intelligent trip circuit board 17 triggers the intelligent trip 6 to act, thereby realizing the overcurrent trip protection function, and specifically comprising the following steps:

Step 1, the intelligent tripping circuit board 17 sends a voltage signal to the magnetic flux unit 16 to trigger the action of the intelligent tripping circuit board, the magnetic flux iron core 16-3 of the magnetic flux unit 16 moves forwards, the magnetic flux iron core cap 16-4 of the magnetic flux iron core 16-3 contacts and pushes the rocker 22 to rotate clockwise, so that the rocker 22 rotates from the left end to the right end of the fan-shaped opening;

During the clockwise rotation of the rocker 22, the push rod 24 of the pushing mechanism overcomes the force of the torsion spring 24-5 of the push rod and rotates anticlockwise around the push rod rotating shaft 24-1; when the mechanism push rod 24 rotates anticlockwise, the limiting action on the operating mechanism 3 is released, so that the operating mechanism 3 rotates from a closing position to a free tripping position under the action of the tension of an operating mechanism spring, and free tripping is realized;

Step 2, when reset after release, the handle of the operating mechanism 3 rotates anticlockwise under the manual condition; when the handle of the operating mechanism 3 rotates anticlockwise, the reset piece 23 is pushed to rotate clockwise around the reset piece rotating shaft 23-1 through the reset transmission piece 23-2, and in the process of rotating the reset piece 23, the reset piece 23 pushes the rocker 22 to rotate anticlockwise, so that the rocker 22 rotates from the right end to the left end of the fan-shaped opening; when the rocker 22 rotates counterclockwise, on one hand, the rocker 22 pushes the magnetic flux core 16-3 of the magnetic flux unit 16 to move backward, and then to retract inward toward the magnetic flux housing 16-2 until the magnetic flux core 16-3 reaches the reset position; on the other hand, when the rocker 22 rotates anticlockwise, the mechanism push rod 24 is separated from the mechanism push rod 24, and the mechanism push rod 24 rotates clockwise under the torsion action of the push rod torsion spring 24-5, so that the free tripping position rotates to the rebuckling position, and reset after tripping is realized.

Second kind: the leakage protection tripping operation mode comprises the following steps:

step 2, when the electric leakage detection module detects that the main circuit has electric leakage fault, the electric leakage detection module triggers an actuating mechanism to act, the actuating mechanism pushes the electric leakage push rod 15 to move forwards, and the electric leakage push rod 15 moves forwards to reach the limit position due to the limit function of the electric leakage push rod mounting groove 15-1; wherein, in the process of the forward movement of the electric leakage push rod 15, the top end of the electric leakage push rod 15 pushes the air blowing push rod 25 to rotate clockwise around the air blowing push rod shaft 25-1; when the air-blowing push rod 25 rotates clockwise, the top end pushing mechanism push rod 24 of the air-blowing push rod 25 rotates anticlockwise around the push rod rotating shaft 24-1; when the mechanism push rod 24 rotates anticlockwise, the limiting action on the operating mechanism 3 is released, and the operating mechanism 3 is released, so that the operating mechanism 3 rotates from the closing position to the free tripping position under the action of the pulling force of the operating mechanism spring, namely: the operating mechanism 3 drives the moving contact 4-3 of the phase system 4 to rotate around the axis through the connecting shaft 4-4, so that the first moving contact 4-3-1 of the moving contact 4-3 leaves the upper fixed contact 4-1, and the second moving contact 4-3-2 of the moving contact 4-3 leaves the lower fixed contact 4-2, thereby realizing the trip and brake separation;

Third kind: a remote manipulation method, comprising:

The master controller is a remote controller, when the remote control switch-on is needed, the master controller enables the first built-in relay to be closed through a remote instruction, and when the first built-in relay is closed, the electric operating mechanism 21 is electrically started; the electric operating mechanism 21 drives the operating mechanism 3 to rotate so as to realize closing;

When the remote control brake release is needed, the master controller enables the second built-in relay to be closed through a remote instruction, and when the second built-in relay is closed, the shunt release 20 is attracted; when the shunt release 20 is sucked, the shunt release drives the brake-separating traction rod of the circuit breaker to act, so that the operating mechanism 3 is driven to rotate, and the brake separation of the circuit breaker is realized.

The intelligent molded case circuit breaker provided by the invention has a double-breakpoint structure, adopts a modularized design, and is divided into a thermomagnetic type and an intelligent type, wherein the two types of release can be exchanged conveniently, the intelligent type release has a communication function, intelligent man-machine interconnection can be realized, the intelligent type release transformer adopts a double-coil structure, the current measurement precision is high, the communication switching-on and switching-off operation of the circuit breaker is realized by adding other accessories, and the leakage protection module can realize the leakage protection function through the leakage push rod.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.

Claims (4)

1. An intelligent molded case circuit breaker, comprising: the intelligent tripping device comprises an upper cover (1), a middle cover (2), an operating mechanism (3), a phase system (4), a base (5) and an intelligent tripping device (6);

The phase system (4) is formed by assembling three or four independent poles, and each independent pole comprises an upper fixed contact (4-1), a lower fixed contact (4-2) and a moving contact (4-3); the movable contact (4-3) of the phase system (4) is connected with the operating mechanism (3) through a connecting shaft (4-4), and the phase system (4) and the operating mechanism (3) are combined and then placed into the base (5) for fixation; the intelligent release (6) is placed in the base (5) and is connected with the phase system (4); after the upper cover (1) is buckled to the middle cover (2), the upper cover and the middle cover are buckled to the base (5) together;

The movable contact (4-3) is of a cylindrical structure, the connecting shaft (4-4) is arranged at the center of the movable contact (4-3), and the operating mechanism (3) drives the movable contact (4-3) of the phase system (4) to rotate around the axis through the connecting shaft (4-4); two opposite ends of the movable contact (4-3) respectively form a first movable contact (4-3-1) and a second movable contact (4-3-2); the connecting line of the first movable contact (4-3-1) and the second movable contact (4-3-2) passes through the connecting shaft (4-4); when the movable contact (4-3) rotates to a closing position, at the moment, the first movable contact (4-3-1) and the second movable contact (4-3-2) are both in a horizontal state, the first movable contact (4-3-1) is contacted with the upper fixed contact (4-1) positioned at the upper right, and meanwhile, the second movable contact (4-3-2) is contacted with the lower fixed contact (4-2) positioned at the lower left, so that closing is realized;

When the operating mechanism (3) moves from a closing position to a free tripping position, the operating mechanism (3) drives the moving contact (4-3) of the phase system (4) to reversely rotate around the axis through the connecting shaft (4-4), so that a first moving contact (4-3-1) of the moving contact (4-3) leaves the upper fixed contact (4-1), and a second moving contact (4-3-2) of the moving contact (4-3) leaves the lower fixed contact (4-2), thereby realizing opening;

The intelligent release (6) comprises a release cover (9), an intelligent release circuit board (17), a release base (10), a connecting row (11), a power supply transformer (12), a measuring transformer (13), a magnetic flux unit (16) and a release transmission reset unit; the connecting row (11) is connected in series in the main circuit, the power supply transformer (12) and the measurement transformer (13) are of annular structures, and after the power supply transformer (12) and the measurement transformer (13) are sleeved into the connecting row (11) in sequence, the power supply transformer (12) and the measurement transformer (13) are buckled together; the connecting row (11) is assembled in the release base (10), and the intelligent release circuit board (17) and the magnetic flux unit (16) are also assembled on the release base (10); the output ends of the power supply transformer (12) and the measurement transformer (13) are connected to the input end of the intelligent tripping circuit board (17); the output end of the intelligent tripping circuit board (17) is connected with the magnetic flux unit (16);

Wherein the magnetic flux unit (16) comprises: a magnetic flux mounting seat (16-1), a magnetic flux housing (16-2), a magnetic flux core (16-3) and a magnetic flux executing piece; the magnetic flux mounting seat (16-1) is provided with a clamping groove matched with the magnetic flux shell (16-2); the magnetic flux shell (16-2) is clamped into the clamping groove, so that the magnetic flux shell (16-2) is fixed; -mounting the magnetic flux actuator inside the magnetic flux housing (16-2); one end of the magnetic flux core (16-3) extends into the magnetic flux housing (16-2) and is connected with the magnetic flux executing piece; the other end of the magnetic flux core (16-3) is positioned outside the magnetic flux housing (16-2); the magnetic flux iron core (16-3) is used for performing linear telescopic motion under the drive of the magnetic flux executing piece; the outer end face head of the magnetic flux iron core (16-3) is integrally formed with a magnetic flux iron core cap (16-4), the magnetic flux iron core cap (16-4) is a round surface, and the diameter of the magnetic flux iron core cap (16-4) is larger than that of the magnetic flux iron core (16-3);

the trip transmission reset unit includes: a rocker (22), a reset piece (23) and a mechanism push rod (24); a rocker mounting groove (22-1) is fixedly arranged on the middle cover (2), and the rocker mounting groove (22-1) is provided with a fan-shaped opening; a rocker rotating shaft (22-2) is fixedly arranged at the bottom of the rocker mounting groove (22-1), the bottom end of the rocker (22) is clamped on the rocker rotating shaft (22-2), so that the rocker (22) can rotate in the range of the fan-shaped opening, and the fan-shaped opening limits the rotation range of the rocker (22);

The mechanism push rod (24) comprises a push rod rotating shaft (24-1), a push rod connecting piece (24-2), a push rod transverse shaft (24-3), a push rod lug (24-4) and a push rod torsion spring (24-5); the push rod connecting piece (24-2), the push rod cross shaft (24-3) and the push rod convex block (24-4) are of an integrated structure, and the push rod convex block (24-4) is fixed on the push rod cross shaft (24-3); the bottom of the push rod connecting piece (24-2) is fixed on the push rod cross shaft (24-3), the top of the push rod connecting piece (24-2) is mounted on the push rod rotating shaft (24-1), the push rod torsion spring (24-5) is used for applying a pulling force to the mechanism push rod (24) in a closing direction, and when no external force acts, the mechanism push rod (24) rotates to a closing position under the pulling force of the push rod torsion spring (24-5);

The reset piece (23) is arranged on the base (5) through a reset piece rotating shaft (23-1); the operating mechanism (3) is provided with an operating mechanism rotating shaft (3-1); the reset transmission piece (23-2) is rotatably arranged on the operating mechanism rotating shaft (3-1), and the reset transmission piece (23-2) is fixed with the operating mechanism (3); when the operating mechanism (3) rotates anticlockwise under the manual condition, the reset piece (23) is pushed to move by the reset transmission piece (23-2);

The bottom of the release base (10) is provided with an exhaust channel (10-1) communicated with the spray arc opening, the front end of the exhaust channel (10-1) is an air inlet, the rear end of the exhaust channel is an air outlet, and the side part of the exhaust channel (10-1) is of a closed structure;

The system also comprises a leakage protection module; the electric leakage protection module comprises an electric leakage push rod (15) and an air blowing push rod (25);

the electric leakage push rod (15) is assembled in an electric leakage push rod mounting groove (15-1) of the release base (10); the electric leakage push rod (15) can move forwards or backwards along the electric leakage push rod mounting groove (15-1); the air blowing push rod (25) is rotatably connected around an air blowing push rod shaft (25-1); the air blowing push rod (25) is arranged between the electric leakage push rod (15) and the mechanism push rod (24).

2. The intelligent molded case circuit breaker according to claim 1, further comprising a shunt release (20) and an electrically operated mechanism (21);

The electric operating mechanism (21) is connected in series with a first built-in relay; when the first built-in relay is closed, the electric operating mechanism (21) is electrically started; the electric operating mechanism (21) drives the operating mechanism (3) to rotate so as to realize switching-on;

the shunt release (20) is connected in series with a second built-in relay; when the second built-in relay is closed, the shunt release (20) is sucked, and the shunt release (20) drives a brake separating traction rod of the circuit breaker to act when being sucked, so that the brake separating of the circuit breaker is realized;

the first built-in relay and the second built-in relay are integrated in the intelligent release (6).

3. A method of operating an intelligent molded case circuit breaker as recited in claim 2, comprising the following three modes of operation:

first kind: the overcurrent trip operation mode comprises the following steps:

The connection row (11) of the intelligent release (6) is connected in series in the main circuit, and the connection row (11) passes through the current in the main circuit;

when working current passes through the main circuit, the power supply transformer (12) induces voltage and provides the voltage for the intelligent tripping circuit board (17), so that the intelligent tripping circuit board (17) is electrified;

after the intelligent tripping circuit board (17) is powered on, the current value detected by the measuring transformer (13) and passing through the connecting row (11) is received, the intelligent tripping circuit board (17) judges whether the current value exceeds a set specified value, and if so, the intelligent tripping circuit board (17) triggers the intelligent tripping device (6) to act, so that an overcurrent tripping protection function is realized;

second kind: the leakage protection tripping operation mode comprises the following steps:

Step 2, when the electric leakage detection module detects that the main circuit has electric leakage faults, the electric leakage detection module triggers an executing mechanism to act, the executing mechanism pushes an electric leakage push rod (15) to move forwards, and the electric leakage push rod (15) moves forwards to reach the limit position due to the limit effect of an electric leakage push rod mounting groove (15-1); wherein, in the process of the forward movement of the electric leakage push rod (15), the top end of the electric leakage push rod (15) pushes the air blowing push rod (25) to rotate clockwise around the air blowing push rod shaft (25-1); when the air blowing push rod (25) rotates clockwise, the push rod (24) of the top pushing mechanism of the air blowing push rod (25) rotates anticlockwise around the push rod rotating shaft (24-1); when the mechanism push rod (24) rotates anticlockwise, the limiting function on the operating mechanism (3) is released, and the operating mechanism (3) is released, so that the operating mechanism (3) rotates from a closing position to a free tripping position under the action of the tension of an operating mechanism spring, namely: the operating mechanism (3) drives the moving contact (4-3) of the phase system (4) to rotate around the axis through the connecting shaft (4-4), so that the first moving contact (4-3-1) of the moving contact (4-3) is separated from the upper fixed contact (4-1), and the second moving contact (4-3-2) of the moving contact (4-3) is separated from the lower fixed contact (4-2), thereby realizing the trip and opening;

Third kind: a remote manipulation method, comprising:

The master controller is a remote controller, when a remote control switch-on is needed, the master controller enables the first built-in relay to be closed through a remote instruction, and when the first built-in relay is closed, the electric operating mechanism (21) is electrically started; the electric operating mechanism (21) drives the operating mechanism (3) to rotate so as to realize closing;

When the remote control brake opening is needed, the master controller enables the second built-in relay to be closed through a remote instruction, and when the second built-in relay is closed, the shunt release (20) is attracted; and when the shunt release (20) is sucked, the shunt release drives a brake separating traction rod of the circuit breaker to act, so that the operating mechanism (3) is driven to rotate, and the brake separation of the circuit breaker is realized.

4. The operating method of an intelligent molded case circuit breaker according to claim 3, wherein in the overcurrent trip operating mode, the intelligent trip circuit board (17) triggers the intelligent trip (6) to act, thereby realizing the overcurrent trip protection function, and specifically comprising the following steps:

Step 1, an intelligent tripping circuit board (17) sends a voltage signal to a magnetic flux unit (16) to trigger the action of the intelligent tripping circuit board, a magnetic flux iron core (16-3) of the magnetic flux unit (16) moves forwards, a magnetic flux iron core cap (16-4) of the magnetic flux iron core (16-3) contacts and pushes a rocker (22) to rotate clockwise, and the rocker (22) is enabled to rotate from the left end to the right end of the fan-shaped opening;

During the clockwise rotation of the rocker (22), the push rod (24) of the pushing mechanism overcomes the force of the push rod torsion spring (24-5) and rotates anticlockwise around the push rod rotating shaft (24-1); when the mechanism push rod (24) rotates anticlockwise, the limiting effect on the operating mechanism (3) is released, so that the operating mechanism (3) rotates from a closing position to a free tripping position under the action of the tension of an operating mechanism spring, and free tripping is realized;

Step 2, when reset after release, the handle of the operating mechanism (3) rotates anticlockwise under the manual condition; when the handle of the operating mechanism (3) rotates anticlockwise, the reset piece (23) is pushed to rotate clockwise around the reset piece rotating shaft (23-1) through the reset transmission piece (23-2), and in the rotating process of the reset piece (23), the reset piece (23) pushes the rocker (22) to rotate anticlockwise, so that the rocker (22) rotates from the right end to the left end of the fan-shaped opening; when the rocker (22) rotates anticlockwise, on one hand, the rocker (22) pushes the magnetic flux iron core (16-3) of the magnetic flux unit (16) to move backwards, and then the magnetic flux iron core (16-3) is contracted inwards to the magnetic flux shell (16-2) until the magnetic flux iron core (16-3) reaches a reset position; on the other hand, when the rocker (22) rotates anticlockwise, the mechanism push rod (24) is separated, and the mechanism push rod (24) rotates clockwise under the torsion action of the push rod torsion spring (24-5) to realize reset after release.