JPS5820442B2 - Shiya disconnector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit breaker, and particularly to a movable contact device thereof.

The basic function of a circuit breaker is to protect and coordinate the electrical system whenever an abnormal situation occurs somewhere in the electrical system.

Operating voltage, continuous current, frequency, short circuit interrupting capability, and coordination of required time and current are considerations that must be considered when designing a circuit breaker.

From a management and industrial standpoint, the electrical industry is increasingly looking for circuit breakers that have superior performance in smaller containers and that also have new and superior features.

Energy storage mechanisms used in single-pole or multi-pole type circuit breakers are already well known in the industry.

The specific construction of such a mechanism is determined primarily by parameters such as the breaker rating.

Of course, many energy storage circuit breakers with closing springs do not store energy while the circuit breaker is operating.

For this reason, some circuit breakers have the disadvantage that they cannot always close instantly.

These circuit breakers, for example, do not have the open-close feature desired by the user of the circuit breaker.

Another problem with conventional circuit breakers is that of matching the spring torque curve to the circuit breaker load.

These conventional circuit breakers each utilize energization and deenergization strokes of 180 degrees.

The spring torque curve is then predetermined and normally it is not possible to match this curve with the breaker load.

Such a predetermined curve is intended to match the breaker and its associated components to the peak torque of the breaker, rather than to match the breaker load curve.

Another problem with conventional circuit breakers relates to the arrangement for connecting the movable contact to one of the plurality of fixed contacts.

These traditional connections consist of a movable contact and one fixed contact, ℃
・In other words, it was to use a laminate, that is, a laminate attached to both the fixed contact on the load side.

These braids are not necessarily desirable in that they may become loose which may interfere with normal breaker operation.

Yet another problem with conventional circuit breakers concerns the contact pressure between the movable and fixed contacts.

These contacts are subjected to large forces when carrying faulty large currents, and this force acts to pull the contacts apart; however, in the case of multiple faults, for coordination purposes, during a period of carrying large currents, the contacts are closed. It is necessary to leave it alone.

This time is said to be the short-time rating of the circuit breaker.

One method used to keep the contacts closed during this time is to use a large spring force to force the movable contact against the fixed contact.

The use of spring force is not recommended because it increases the cost of the breaker, increases the complexity of the operating mechanism, and requires more force to reset the breaker.

Another method is to use movable current-carrying conductors as fixed conductors, and these movable current-carrying conductors are placed against the connecting conductors in a magnetically repulsive manner to assist the contact force.

However, this method requires a separate location for the breaker;
Also, an extra length of current-carrying conductor is required.

According to the present invention, a more desirable circuit breaker is obtained that includes a fixed conductor and a movable contact that acts on the fixed conductor between open and closed positions.

When this movable contact is in the closed position, it makes a particularly strong electrical connection with the fixed conductor and allows current to flow therethrough.

A drive is provided for moving the movable contact between open and closed positions.

In the drawings, in particular in FIG. 1, a circuit breaker according to the invention is shown.

Although this description refers to molded case energy storage circuit breakers, it applies equally to general circuit breakers, contactors, switching switches, relays, and disconnectors.

The barrier 10 has a support 12 consisting of a mounting 14, side walls 16 and a frame 18.

First and second fixed conductors 20, 22 are provided within the support 12.

The second fixed conductor 22 is connected to the incoming conductor, while the first fixed conductor 20 is connected to a load (not shown).

The movable contactor 24 electrically connects the two fixed conductors 20 and 22.

The movable contact 24 includes a movable contact 26, a movable arc contact 28, a contact holder 30, and a holder 64 for contact and spring.
It consists of

The movable contact 26 and the arcing contact 28 are pivotally supported by the fixed conductor 20 and are in an open or closed position relative to the fixed conductor 22.

In the description of this invention, the term "open" is used with respect to contact position to indicate that the movable contact 26 and arcing contact 28 are in a position away from the fixed conductor 22, whereas the term "closed" is used to refer to the movable contact position. It is shown that the contact 26 and the arc contact 28 are in contact with both the fixed conductors 22 and 20.

The movable contact 26 and the arc contact 28 are attached to and held by a contact holder 30 and a holder 64 consisting of a contact and a spring.

Inside the circuit breaker 10, there is an operating mechanism 32. toggle device 34;
There is also an arc chute 36 which serves to extinguish the arc that occurs when movable contact 26 and arcing contact 28 change from a closed position to an open position.

A current transformer 38 is used to monitor the current through the fixed conductor 20.

Referring now to FIG. 12, details of the movable contact 26 are shown.

The movable contact 26 is made of a good electrical conductor, such as copper or aluminum, and has a contact surface 40 that mates with a similar contact surface 42 (FIG. 1) of the fixed conductor 22 whenever the movable contact 26 is in the closed position. have

The movable contact 26 is connected to a circular cut-out section 44 on the opposite side of this contact surface 400 and from this circular cut-out section 44 to the movable contact 2
6.

There is a large miso opening 48 at one end of this groove 46.

The movable contact 26 also includes a recess 50 at the end opposite the contact surface 400.

The movable contact 260 circular cutout section 44 is sized to fit into the circular section 52, (FIG. 11) that is part of the fixed conductor 20.

Circular cutout section 44 and groove 46 can be used to tighten around circular section 52 to pivot support for movable contact 26 while in electrical contact with fixed conductor 20.

As shown in FIG. 11, the arc contact 28 is connected to the movable contact 2.
6 to form an arc contact surface 54 which contacts a contact surface 56 (FIG. 1) also provided on the fixed conductor 22.

The arc contactor 28 and the movable contact 26 are attached to and held by a contact holder 30.

A pin 58 passes through the large groove 48 of the movable contact 26 and extends outward to be attached to the contact holder 30.

The contact holder 30 is attached to a contact and spring holder 64 by screws 60, 62 (FIG. 10).

The contact holder 30 is pivotally connected to the end of the circular section 52 by a pin 53.

The contact and spring retainers 64 are usually made of mochared plastic.

By connecting the movable contacts 26 to the contact holder 30 in this manner, each of the plurality of movable contacts 26 can rotate slightly freely.

When the movable contact 26 is in the closed position, the contact surface 40 and the contact surface 4
In order to maintain the contact pressure with 2, the recess 5 of the movable contact 26
A spring 66 is provided in the 0 and attached to the contact and spring holder 64 (FIG. 1) (FIG. 10).

The purpose of this spring 66 is to help increase the contact pressure between the movable contact 26 and the fixed conductor 22 in order to make the breaker able to withstand large currents that resist forces acting to pull the movable contact 26 away from the fixed conductor 22. The magnetic repulsion device 59 and the magnetic attraction device 65 (FIGS. 17 and 1) cooperate in the circuit breaker 10, as will be described below.

As shown in FIGS. 17 to 20, the magnetic repulsion device 59 includes a repellent body 61 which is in the shape of a rod and is provided near the movable contact 260 attached to the contact holder 30 made of stainless steel.
This repellent body 61 is attached to the mounting base 14.

The magnetic repellent 61 is made of a good conductor such as copper or aluminum.

The theory of operation of the magnetic repellent 61 will be better understood from FIGS. 15 and 16.

As can be seen from FIGS. 15 and 16, the magnetic repulsion body 61
is provided near the movable contact 260.

However, for the sake of explanation, the current flows through the movable contact 26 from left to right in FIG. 15, and flows out of the paper as shown in FIG. 16.

The direction of this current is indicated by the arrow in Fig. 15, and the direction of this current is indicated by the arrow in Fig. 16.
It is indicated by.

In FIG. 16, this current creates a magnetic field around the movable contact 26 in a clockwise direction.

This magnetic field induces eddy currents in the magnetic repellent body 62.

However, as shown in FIG. 15, this eddy current is in the opposite direction to the current passing through the movable contact near the movable contact.

That is, in FIG. 15, the direction is clockwise.

This eddy current in the opposite direction flows between the movable contact 26 and the magnetic repulsion body 61.
A magnetic repulsive force is generated between the two.

This magnetic repulsive force acts on the movable contact 26 such that the movable contact 26 experiences contact pressure against the fixed contact 22 whenever current is flowing through the movable contact 26.

As is well known to experts in this field, the larger the current passing through the movable contact 26, the thicker the eddy current induced in the magnetic repulsion body 61, and the larger the magnetic repulsion force becomes. The contact force between the contact point 26 and the fixed conductor 22 also increases.

Therefore, when the magnetic repellent 61 is used in this manner, the contact force between the movable contact 26 and the fixed conductor 22 increases in proportion to the amount of current passing through the movable contact 26.

Next, referring to FIG. 17, the magnetic repulsion body 61 is a single rod extending near all the movable contacts 26 and arc contacts 28, and these movable contacts and arc contacts are a contact holder 30 and a holder 6 for contacts and springs.
4 are shown held in each case.

To create a return path for the eddy current, if necessary, add a magnetic repellent 6.
One extension body 63 may be provided near the contact holder 30 (and on both sides of the contact 260) as shown in FIGS. 18 and 20.

It is shown in FIG. 19 that the magnetic repulsion device 59 is made up of a plurality of magnetic repulsion bodies 61.

These individual magnetic repellents 61 are placed near their respective movable contacts 26 or arcing contacts 28.

According to one method of using these plurality of magnetic repellents 61, the magnetic repulsion device 59 is connected to each movable contact 2.
6 and the arc contact 28.

Another advantage of this stacking is that it helps overcome the effect of three-phase interaction on the current distribution of the magnetic repellent 61. Yet another example of overcoming the effect of three-phase interaction is as follows. In the case of the rectangle shown in FIG.
It has a plurality of fins 201 extending between.

1, a magnetic attraction device 65 is shown which is used to increase the contact pressure between the movable contact 26 and the fixed conductor 22 whenever the movable contact 26 is in the closed position.

The magnetic attraction device 65 consists of a bar or attraction block 67 of soft magnetic material, such as iron, and is mounted on the mount 14 of the circuit breaker 10 near the movable contact 26.

This rod 67 is in such a position that the attractive force between the movable contact 26 and this rod 67 causes the movable contact 26 to exert a strong contact force against the fixed conductor 22. It is caused by a current in the movable contact 26 which sets up a magnetic field around which it extends.

Due to the properties of this soft magnetic material, this magnetic field acts to create an attractive force between the movable contact 26 and the rod 67 without causing eddy currents to flow through the magnetic attraction device 65 as in the magnetic repulsion device 59.

This attractive force acts to move the movable contact 26 towards the rod 67 (but cannot reach the rod 67 because of the fixed conductor 22).

However, for this reason, a high contact pressure between the movable contact 26 and the fixed conductor 22 is desirable as it helps withstand the large currents flowing between the fixed conductor 22 and the movable contact 26.

The same holds true for the magnetic repulsion device 59; as the current passing through the movable contact 26 increases, the repulsive force between the magnetic repulsion body 61 and the movable contact 26 increases, and this repulsive force is proportional to the increase in the current passing through the movable contact 26. .

11, the movable contact 260 circular cutout section 44 and groove 46 act to increase the contact pressure against the circular section 52 whenever the movable contact 26 is in the closed position.

That is, the movable contact 26, in particular the contact surface 40, is connected to the fixed conductor 2.
2, the current flowing from the fixed conductor 22 to the fixed conductor 20 is transferred to the two parallel conductive members 45.
47 (FIG. 12) through the circular section 52 of the fixed conductor 20.
flows to

Due to the current in these conductive members 45 and 47, these conductive members 45 and 47 act to attract each other.

This suction force will increase the contact pressure against the circular section 52.

If necessary, the current through the movable contact 26 is small;
or during the absence of the conductive member 4 against the circular section 52.
5,470 A contact spring arrangement 49 may be connected to the conductive member 45.47 to increase the contact pressure.

As is well known to experts in this field, multiple movable contacts 2
6 is normally provided on each contact holder 30, contact and spring holder 64.

These movable contacts are the same as those mentioned before,
Fixed conductor 200 is pivotally connected to circular section 52 .

Since the pin 58 extends through the similar large openings 48 of all the movable contacts 26, the movable contacts 2
Whenever 6 changes position from open to closed or from closed to open, all of the movable contacts 26 move together.

Also shown in FIG. 10, there is a armrest 68 extending between the individual contacts and the spring retainer 640.

Each of the three poles is connected to the movable contact 26 by this arm 68.
, the arc contactor 28 can be reliably moved at the same time as the operating mechanism 32 moves to the open or closed position.

As shown in FIG. 13, arm 68 extends into contact and spring retainer 640 lower 0. As shown in FIG.

A pin 72 extends through the lower part 4 of the contact and spring holder 640 and the lower part of the arm 68 to prevent the arm 68 from slipping out of the contact and spring holder 64.

This armrest 68 also has a push rod 78.

This push rod 78 has an opening 80 through which the armrest 68 passes today.

Push rod 78 has a tapered end 82 and a shoulder 84.

The push rod 18, to be more specific, the end 82 is the mounting base 1
A spring 88 is provided around the push rod 78, extending into the opening 86 in the push rod 78 (FIG. 2).

These springs 88 act to exert a force against the shoulder 84 of the push rod 78, biasing the armrest 68 and movable contact 26 to the open position.

To close movable contact 26, arm 68 must be moved to compress push rod 78 or spring 88.

This movement is effected by an operating mechanism 32 and a toggle device 34.

2-4, toggle device 34 and operating mechanism 32 are shown.

The toggle device 34 includes a first link 90, a second link 92, and a toggle lever 94.

The first link 90 includes a pair of spaced apart first link elements 9
6.98, each of which has 100 grooves.

The first link elements 96, 98 and grooves 100 engage the arms 68 intermediate the three contact and spring retainers 64 so that the arms 68 are engaged when the first link 90 is moved to the toggle position. Gives the movement.

a first link element 96 between the contact and the spring holder 64;
The position of 98 reduces the deflection of arm 68 due to large force during short circuit current.

When the groove 100 is used to connect the armrest 68, the operating mechanism 32
can be easily removed from armrest 68.

Although the three-pole circuit breaker shown in FIG. 2 has been described, the foregoing also applies to the four-pole circuit breaker shown in FIG. 14.

In this quadrupole breaker, the first link elements 96, 98 are arranged between the inner contacts and spring holders 186, 188 and the outer contacts and spring holders 187, 189.

The second link 92 includes a pair of spaced apart second link elements 1
02,104, each with a pivot point of 10
3 to the first link element 96°98.

The toggle lever 94 consists of a pair of spaced apart toggle lever elements 106 and 108, which are attached to the pivot axis 10.
7 to the second link elements 102, 104;
Additionally, the toggle lever elements 106 and 108 also have a pivot point 1.
It is pivotally connected to the side wall 16 at 10 .

The drive pins 112, 114 are connected to the second link element 102°10.
4 and arranged on a line.

Drive pins 112, 114 pass through in-line ports 116, 118 in side wall 16 near driven plates 120, 122.

The operating mechanism 32 includes a pair of spaced cams 126.
It consists of a drive shaft 124 that rotates around a shaft 125 on which a shaft 128 is attached.

These cams 126 , 128 are shaped to rotate together with the drive shaft 124 and to apply a constant load to the rotating device 129 .

This rotating device 129, such as a handle, is attached to the drive shaft 124 and imparts rotation thereto.

The operating mechanism 32 also includes driven plates 120, 122 secured together by driven plate connectors 130 (FIG. 3).

The cam roller 132 is fixed to the driven plates 120 and 122, and as will be described later, the cam roller 132 is fixed to the driven plates 120 and 122 in the biased position.
22.

The driving pawls 134 and 136 are also connected to each driven plate 120,
122, which is near the drive pins 112,114.

Drive pawls 134, 136 are pivotally connected to driven plates 120, 122 by pins 138, 140, and springs 14
It receives 2,144 forces.

The driven plates 122, 120 are connected to the connecting rod 1 extending between them.
46 and is pivotally connected to the connecting rod 146 by a spring device 148.

The spring device 148 is also pivotally connected to the support 12 by a connecting rod 150.

If desired, display device 152 (FIG. 2) cooperates within circuit breaker 10 to display movable contacts 26, arcing contacts 28,
The position of spring device 148 may also be indicated.

The operation of this circuit breaker can be better understood with reference to FIGS. 3 through 9.

4 through 9 sequentially illustrate the movement of various parts as the breaker 10 changes position from a spring deenergized open contact to a spring biased closed contact.

In FIG. 4, spring 148 is deenergized and movable contact 26 is in the open position.

Fixed conductors 20, 22, movable contacts 26, arc contacts 28
are not shown in FIGS. 4 to 9, but the arm 68 to which they are connected is shown, and it can be seen that the position of the arm 68 represents the position of the movable contact 26 with respect to the fixed conductor 22. Will.

First, the drive shaft 124 is rotated clockwise by the rotating device 129 (FIG. 2).

As the drive shaft 124 rotates, the cam roller 132 engaged with the drive shaft is pushed outward a distance equal to the larger diameter portion of the cam.

FIG. 5 shows the position of each component when cam 126 has rotated approximately 180 degrees about axis 125 from its initial position.

As can be seen in FIG. 5, cam roller 132 has moved outward relative to its initial position.

This movement of cam roller 132 causes driven plate 120 to rotate about its pivot axis 107.

Further, the driving pawl 134 is the same (rotates) together with the driven plate 120.

(The foregoing and subsequent explanations of the movement of the various parts will be given only in elevation.

It is assumed that most cooperating parts in a circuit breaker have corresponding parts on the opposite side of the circuit breaker.

This description does not intend to cover these corresponding parts, which work the same way except in special cases.

) FIG. 6 shows the position of the parts as the cam 126 rotates further.

Cam roller 132 moves past end point 151 of cam 126 and comes into contact with flat surface 153 of latch member 154.

Driven plate 120 rotates to its maximum extent about its pivot axis 107 and spring 148 is strongly biased.

The drive pawl 134 has moved to a position close to the drive pin 112.

Latch member 154 has its second plane 156 wrapped around the curved portion of D-latch 158 .

In this position, spring 148 is biased and latch member 15
4, the driven plate 120 will rotate counterclockwise.

When the cam roller 132 moves during the counterclockwise rotation of the driven plate 120, the first ten surface 153 of the latch member 154 is in the movement path of the cam roller 132.

Therefore, as long as the first plane 153 of the latch member 154 is on this path, the cam roller 132 and the driven plate 120 fixed thereto cannot move counterclockwise.

The action of second surface 156 against D-latch 158 holds latch member 154 in position within the path of cam roller 132.

The latch member 154 is pivotally connected to the drive shaft 124 (FIGS. 2 and 3) but is free to move.
It is under the force of a spring 160 (FIG. 4).

The force of the cam roller 132 acts on the first plane 153, but D-
Without launch 158, latch member 154 would be rotated clockwise around drive shaft 124 by this force, disengaging cam roller 132 and deenergizing spring 148.

Therefore, the D-latch 158 acts to stop the clockwise movement of the plane 1560 that moves the first plane 153 out of the path of movement of the cam roller 132 as the driven plate 120 rotates.

To release latch member 154, release device 162 (FIG. 4)
Press to cause the D-latch 158 to rotate clockwise.

This clockwise rotation disengages the latch member 154 from the second plane 156, allowing the latch member 154 to rotate clockwise so that the first plane 153 is aligned with the cam roller 1.
This released condition, which results in movement away from the path of 32, is shown in FIG. rotate around.

Rotation of driven plate 120 moves cam roller 132 to the position of the smallest diameter portion of cam 126 .

At the same time, the rotation of the driven plate 120 causes the drive pawl 134 to act to press the drive pin 112.

By pressing the drive pin 112, the drive pin 112
and the second link element 102 to which it is connected is moved to the right as shown.

This movement moves the second link element 102 and the first link element 96 together with the toggle lever element 106 to the toggle position.

This movement to the toggle position causes the shoulder 84 (
Arm 68 is moved which compresses spring 88 (FIG. 13) against spring 88 (FIG. 2), and movable contact 26 is moved to a closed position in electrical contact with fixed conductor 22, as shown in FIG.

Movable contact 26 remains in the closed position because toggle device 34 (FIG. 4) is in the toggle position.

Once toggle device 34 is in the toggle position, it remains there unless toggle lever 94 (FIG. 4) is removed.

As can be seen from this explanation, in this case, the first drive pawl 134
is in its initial position but near drive pin 1120.

The first link 90 and the second link 92 are restricted in their movement by a restriction bolt 164 as they move to the toggle position.

This bolt 164 prevents the two links from bending backwards and out of the toggle position.

(In this specification, the term "toggle position" is intended to include not only the position when the first and second links are in the correct position, but also the position when they are slightly overtoggled.

) In this position, the breaker is in a state in which the spring 148 is deenergized and the movable contact 26 is closed.

Next, FIG. 8 shows that while the movable contact 26 is closed, the spring 148
is energized and stores energy to perform a continuous operation of open → close → open.

FIG. 8 shows that the cam 126 is rotated approximately 180 degrees and the driven plate 1
20 is turned around its pivot axis 107 to partially bias spring 148, as in FIG.

Further, the driving pawl 134 rotates together with the driven plate.

FIG. 9 shows this condition, with spring 148 fully biased and movable contact 26 closed. Drive pawl 134 is in the position of FIG. 6 except that drive pin 112 is no longer in contact with the drive pawl. It's the same.

The latch member 154, particularly its first plane 153, is in the path of the cam roller 132 to stop rotation of the driven plate 120.

Second surface 156 is held in position by D-launch 158 as previously described.

It will be seen that in this position, the breaker mechanism is capable of continuous open->close->open operation.

When the toggle latch trip device 166 (FIG. 4) is tripped, the toggle lever 94 can no longer be in the toggle position between the first link 90 and the second link 92 and is moved slightly counterclockwise. (When this toggle lever 94 moves counterclockwise, the second link 92 moves clockwise,
The first link 90 rotates around a connecting shaft with the toggle lever 94, and is moved counterclockwise by the second link 92.

With such a toggle movement, the push rod 78 (Fig. 13)
Spring 88 (Figure 2) Arm arm 68 that was pushing against VC
(The force is relaxed and the armature 68 and contact 26 move to the open position due to the relaxation of the spring 88.

At this time, the positions of the parts are as shown in FIG.

To immediately close the movable contact 26, the latch member 154 is released, which causes rotation of the driven plate 120 as described above, and the first drive pawl 134 contacts the drive pin 112, causing the drive pin 112 to Movement occurs with the secured second link element 102 returning again to the toggle position.

The state at this time is the position of the parts shown in FIG.

At that time, the toggle latch trip device 166 (FIG. 4)
The breaker can be immediately recirculated by removing the breaker, which is the position of the parts shown in FIG.

Therefore, it will be appreciated that this mechanism is capable of rapid open->close->open continuous operation.

In the embodiment described herein, the positions of the various parts are determined to provide inexpensive and simple operation.

The operating shaft 124 to the operating mechanism 32 is rotated approximately 360°.

However, this output torque occurs over a small angular range, thereby providing a large mechanical advantage.

As can be seen from the explanation of the continuous operation above, the output torque is 9
Occurs in an angle range of 0° or less.

This provides a mechanical advantage of more than four times.

For compactness and maximum efficiency, the axis that pivots the second link 92 to the toggle lever 94 coincides with the axis of rotation of the driven plates 120, 122 (FIGS. 2 and 3); It is a separate axis.

Another mechanical advantage is the construction of the toggle latch trip device 166 when it is desired to trip the toggle device 34 from the toggle position.

Toggle latch trip device 166 is shown in FIGS. 3 and 4.

The toggle latch trip device 166 consists of a latch member trip lever 168, two D-latches 170 and 172, a catch 174, springs 176 and 178, and a detent pin 180.

To trip the toggle device 34, the trip lever 168 is pushed.

When this trip lever 168 is pressed, the D-latch 170
0 Clockwise rotation occurs.

A latch 174 that was attached to the D-latch 170 and was forced to rotate clockwise by a spring 176.
can move clockwise.

When this Kagegane 174 moves clockwise, the Kagegane 17
A corresponding clockwise movement of the D-latch 172 to which the shaft 179 of 4 is fixed occurs.

This movement of the D-latch 172 causes the latch lever 94 (third
), i.e. plane 1 where the D-latch 172 was originally located.
82 moves so that its plane 184 rests on D-latch 172.

Therefore, the toggle lever 94 can be moved counterclockwise to untoggle the toggle device 34.

When toggle device 34 is removed and movable contact 26 is in the open position, spring 178 returns toggle lever 94 to that position;
Plane 182 rests on D-launch 172.

A detent pin 180 is used to retain the toggle lever 94 in its correct position to prevent the toggle lever 94 from rotating too far clockwise.

The mechanical advantage of this trip mechanism is that the clockwise rotation of D-latch 172 that trips toggle lever 94 is very small compared to the large rotation of latch trip lever 168.

As seen in FIGS. 3 and 4, D-latches 170 and 1
58 is attached to each of the two levers.

Levers 183 and 190 are attached to D-latch 158 and levers 168 and 192 are attached to D-latch 170.

These levers 190 and 192 trip the breaker;
Used to allow electromechanical or remote control of spring deenergization.

Shunt array disconnector 193 for electromechanical magnetic flux transmission (Fig. 3)
is attached to the frame 194 (Fig. 4), and the current transformer 38 (first
When an overcurrent condition occurs, the shunt train disconnector 193 operates to rotate the lever 192 clockwise to trip the toggle lever 94 and open the contact device 24.

An electric solenoid device is located near the lever 190 (in the frame 194), so pressing a switch (not shown) from a distance causes the lever to rotate 1900 times, causing rotation of the D-launch 158 and deenergization of the spring 148. The breaker closes.

According to the device of this invention, by pivotally connecting the movable contact to the fixed conductor, as the current passing through the movable contact increases, a large coupling force can be obtained with respect to the pivot shaft. If one end of each is connected to only one fixed conductor, a circuit breaker can be obtained which also has a compact effect.

[Brief explanation of drawings]

FIG. 1 is an elevational view showing a cross section of a breaker according to the present invention, FIG. 2 is an end view of the breaker including the longitudinal section of FIG. 1,
3 is a plan view of the mechanism shown in FIG. 4, FIG. 4 is a detailed sectional view of the shear breaker operating mechanism with the spring deenergized and the contacts in the open position, and FIG. a drawing of the operating mechanism of FIG. 4 when the spring is biased and the contacts are in the open position; FIG. 6 is a drawing related to FIGS. 4 and 5 when the spring is biased and the contacts are in the open position; Figure 7 is a drawing related to Figures 4, 5, and 6 when the spring is deenergized and the contacts are in the closed position, and Figure 8 is a drawing when the spring is biased to some extent and the contacts are in the closed position. Drawings related to Figures 4, 5, 6, and 7 at a certain time,
Figure 9 is a diagram related to Figures 4, 3, 6, 7, and 8 when the spring is energized and the contacts are in the closed position, and Figure 10 is the contact when energized. A plan view of the device, FIG. 11 is a side sectional view of the conductive device, and FIG. 12 is a detailed view of the movable contact.
Figure 3 is a side view of the arm arm device, Figure 14 is a modified drawing of the multi-pole contact device, Figure 15 is a schematic diagram showing the state in which magnetic repulsion is generated, and Figure 16 is a diagram showing the generation of magnetic repulsion. 17 is an end view of the movable contact and magnetic repulsion body, FIG. 18 is a modified drawing of the one in FIG. 17, FIG. 19 is a modified drawing of the same as in FIG. 17, and FIG. This is a modified drawing of. In these drawings, the same reference numerals indicate corresponding parts: first fixed conductor...curve 2o, second fixed conductor...22, movable contact curve 24, groove. ...Track 46, Pivot connecting device/Track 44 and 52, Operation mechanism...32°

Claims (1)

[Claims] 1 first and second spaced stationary conductors extending elongately for operation between an open position and a closed device with respect to said stationary conductors; a movable contact for passing current between conductors; an elongated groove provided in the movable contact and extending from one end thereof; provided on both sides of the groove at one end of the movable contact;
A breaker comprising a device for pivotally connecting one end of the movable contact and the first fixed conductor, and a device for moving the movable contact between an open position and a closed position.