CN114184951B - Breaker spring operating mechanism simulation system - Google Patents
Breaker spring operating mechanism simulation system Download PDFInfo
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- CN114184951B CN114184951B CN202111523524.5A CN202111523524A CN114184951B CN 114184951 B CN114184951 B CN 114184951B CN 202111523524 A CN202111523524 A CN 202111523524A CN 114184951 B CN114184951 B CN 114184951B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a circuit breaker spring operating mechanism simulation system, which comprises a first power end, a second power end, an energy storage timing loop, a switching-on/off control loop, a switching-off operation loop, a switching-on operation loop and a current-voltage breaking control loop which are connected in parallel between the first power end and the second power end, wherein the switching-on/off control loop is connected with the first power end in parallel; the loops are respectively provided with a relay coil and contacts of the relay, and mutual control is realized between the loops through actions of the relay. Compared with the prior integrated circuit-based mode, the invention adopts the relay to realize the control logic and has the advantages of low cost, strong anti-interference capability, high reliability, good adaptation capability and the like.
Description
Technical Field
The invention relates to a simulation system for simulating the action of a spring operating mechanism of a circuit breaker.
Background
In order to promote the high-quality development of the power grid, standardized custom equipment is listed in a line of key development, any type of standardized terminal can be directly matched with the standardized pole-mounted circuit breaker of the same type, and secondary equipment manufacturers have requirements for the visualization of the performance and function detection results in factories and on site of the standardized pole-mounted circuit breaker.
More and more secondary fusion complete equipment is paved on site to realize fault judgment and fault cutting, and data in the terminal can facilitate operation and maintenance personnel to carry out fault analysis, so that the method has important significance for optimization of subsequent lines. Thus, comprehensive detection of intelligent power distribution terminal functionality becomes particularly important.
The operating mechanism of the currently used circuit breaker mainly comprises a spring operating mechanism and a permanent magnet mechanism. The time required for opening and closing the permanent magnet mechanism is smaller than that of the spring operating mechanism, but the magnetic circuit inductance L is changed greatly in the closing process to generate back electromotive force, so that the increase of current of a closing coil is restrained, the restraining effect is enhanced along with the increase of closing speed, the number of permanent magnet switches is small, and the safety problem of the energy storage capacitor of the permanent magnet mechanism is not incorporated into a standardized design at present. The 7 standardized pole-mounted circuit breaker packages that have been published all use spring operated mechanisms, primarily to enhance the reliability of the circuit breaker. Therefore, most of the current use in China is a breaker based on a spring operating mechanism.
Devices for partially simulating circuit breakers are known in the prior art. However, most simulation devices are based on integrated electronic components, and the simulation function is realized by means of a chip to realize breaking logic. Such devices are costly, unsuitable for mass use, and have poor tamper resistance and are difficult to repair if a fault occurs.
Disclosure of Invention
The invention provides a breaker spring operating mechanism simulation system, which aims to: the cost of the simulation system is reduced, and the anti-interference capability, the reliability and the adaptation capability matched with various power distribution terminals are improved.
The technical scheme of the invention is as follows:
the circuit breaker spring operating mechanism simulation system comprises a first power end, a second power end, an energy storage timing loop, a switching-on/off control loop, a switching-off operation loop, a switching-on operation loop and a current and voltage breaking control loop which are connected in parallel between the first power end and the second power end;
each loop is respectively provided with a relay coil and a contact of the relay, and mutual control is realized between the loops through actions of the relay;
the energy storage timing loop is used for simulating the energy storage action of the circuit breaker and sending an energy storage completion signal to the closing operation loop;
the opening operation loop and the closing operation loop are respectively used for sending an opening operation signal and a closing operation signal to the opening and closing control loop;
the switching-on/off control loop is used for simulating the position signal change of the circuit breaker according to the switching-on operation signal and the switching-off operation signal, and sending the position signal to the switching-on operation loop, the switching-off operation loop and the current-voltage switching-off control loop;
the current-voltage breaking control loop is used for controlling breaking of external feeder terminal voltage and a current source according to the position signal.
As a further improvement of the simulation system: the first power end is connected with an anode CN+ of the energy storage power supply, and the second power end is connected with a cathode CN-of the energy storage power supply;
the simulation system comprises an energy storage time relay KT1, a relay KA2, a relay KA3 and a relay KA4;
in the energy storage timing loop, a normally closed contact KA2-1 of a relay KA2 and a normally closed contact KA3-1 of a relay KA3 are connected in parallel and then connected in series with a coil of an energy storage time relay KT 1;
in the switching control loop, a coil of a relay KA2 is connected in series with a normally open contact KA1-4 of a relay KA1 and then connected in parallel with a coil of the relay KA1, then connected in series with a normally open contact KA3-2 of a relay KA3 and a normally open contact KA1-1 of the relay KA1 which are connected in parallel, and then connected in series with a normally closed contact KA4-1 of a relay KA4;
the switching-off operation loop comprises a switching-off normally open button SB1, normally open contacts KA1-2 of a relay KA1 and coils of a relay KA4 which are sequentially connected in series along a first power end to a second power end;
the switching-on operation loop comprises a switching-on normally open button SB2, a normally open contact KT1-1 of an energy storage time relay KT1, a normally closed contact KA2-2 of a relay KA2 and a coil of a relay KA3 which are sequentially connected in series along a first power end to a second power end.
As a further improvement of the simulation system: the current and voltage breaking control loop comprises a coil of a current breaking relay KA5 and a coil of a voltage breaking relay KA6 which are connected in parallel, and normally open contacts KA2-4 of a relay KA2 connected in series with the two relays after being connected in parallel;
the contact KA5-1 of the current breaking relay KA5 is used for switching connection states among an IA source side, an IA terminal side and an In source side, when a coil of the current breaking relay KA5 is In power failure, the contact KA5-1 is used for communicating the IA source side with the In source side, and when the coil of the current breaking relay KA5 is In power failure, the contact KA5-1 is used for communicating the IA source side with the IA terminal side;
the contact KA6-1 of the voltage breaking relay KA6 is used for switching the connection state between the UA source side and the UA terminal side, when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 disconnects the UA source side and the UA terminal side, and when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 communicates the UA source side with the UA terminal.
As a further improvement of the simulation system: the switching indicating bit module comprises a remote signaling public terminal YXCOM, a non-energy storage terminal WCN, a switching terminal FW and a switching terminal HW, and further comprises a contact KT1-2 of an energy storage time relay KT1 and a contact KA2-3 of a relay KA 2;
when the timing of the energy storage time relay is finished, the contacts KT1-2 disconnect the remote signaling public terminal YXCOM from the non-energy storage terminal WCN, otherwise, the two terminals are in a conducting state;
when the coil of the relay KA2 is powered on, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position combining terminal HW, and when the coil of the relay KA2 is powered off, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position dividing terminal FW.
As a further improvement of the simulation system: the second power end is also connected with a negative end HZ-of a closing signal and a negative end FZ-of a separating signal; the node between the normally open button SB1 and the normally open contact KA1-2 is also connected with the positive end FZ+ of the opening signal; the node between the normally open button SB2 and the normally open contact KT1-1 is also connected to the positive end HZ+ of the closing signal.
As a further improvement of the simulation system: the switching-off operation loop further comprises a switching-off loop disconnection normally closed button SB3 connected with the coil of the relay KA4 in series; the switching-on operation loop further comprises a switching-on loop disconnection normally-closed button SB4 connected with the coil of the relay KA3 in series.
As a further improvement of the simulation system: the energy storage timing loop further comprises an energy storage coil L which is connected with the energy storage time relay KT1 in parallel.
As a further improvement of the simulation system: the energy storage display circuit comprises an indicator lamp HL connected in series 1 And a normally open contact KT1-2 of the energy storage time relay KT 1.
As a further improvement of the simulation system: the switching control loop also comprises a position indicator lamp HL connected with the coil of the relay KA1 in parallel 2 。
Compared with the prior art, the invention has the following beneficial effects:
(1) The system is based on the relay, realizes the simulation of actions such as energy storage, closing, opening and the like of the spring operating mechanism of the circuit breaker, and has the advantages of low cost, strong anti-interference capability and high reliability compared with an integrated circuit simulation mode; the linkage problem is solved, and the multiple devices can be matched to perform line simulation, and can be used as a first-stage switch, a sectionalizing switch, a branch switch, a user demarcation switch and the like to finish the functions of fault positioning, feeder automation and the like; and can be adapted to all types of feeder terminals, such as electromagnetic, electronic, digital, etc.
(2) The action logic of the system is completely consistent with that of the circuit breaker, when the energy storage is incomplete, the system is in a brake-separating state and cannot be switched on, the energy storage is automatically carried out again after the brake is switched on, and the brake-on operation cannot be repeated unless the brake-separating operation is carried out and the energy storage is completed again, and the system can be used for quick brake-separating tests (rated operation sequence: O-t-CO-t '-CO, t=0.3 s and t' -3 min).
(3) The system solves the problem of self-locking middle oscillation in logic, specifically, if only the relay KA1 is used for controlling the state of opening and closing, after KA1 is powered on, in a period of time when self-locking is not completed, the contact point of KA1 can already cut off the electricity of the coil of the relay KA3 in a closing operation loop (namely, the contact point KA2-2 is a contact point of KA 1), at the moment, KA3-2 can cut off the electricity of the coil of KA1, so that KA1 is immediately powered off after power on, self-locking cannot be completed, and error occurs in control logic; the opening and closing control of the invention is jointly determined by the two relays KA1 and KA2, when the KA1 is powered on, only after the KA1-4 is closed (the KA1-1 is synchronously closed to complete self-locking), the contact KA2-2 of the relay KA2 can break the power of the KA3, thereby thoroughly avoiding the vibration problem of power failure immediately after the KA1 is powered on.
(4) The energy storage time can be adjusted in a self-defined way through the energy storage time relay.
(5) The switching-on and switching-off can be controlled manually through SB1 and SB2, and can also be controlled through a switching-on signal and a switching-off signal.
(6) Control loop disconnection tests can also be performed by SB3 and SB4.
(7) The power supply problem is solved, an external power supply is not needed, and various operations can be completed by utilizing the energy storage power supply and matching with the power distribution terminal.
(8) The external three-phase voltage, the zero-sequence voltage, the three-phase current, the zero-sequence current and the like can be controlled to be cut off and closed under the condition that the current source is not cut off by KA5 and KA6, and in the opening state, the voltage is in the cut-off state, the current flows back to the current source, and when the current source is closed, the current and the voltage flow to the terminal side.
Drawings
FIG. 1 is an electrical schematic diagram of the present device;
FIG. 2 is a schematic diagram of the split-close indication bit of the device;
fig. 3 is a schematic diagram of the voltage-current switching control of the device.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings:
as shown in fig. 1, the circuit breaker spring operating mechanism simulation system comprises a first power end and a second power end, wherein the first power end is connected with a positive pole CN+ of an energy storage power supply, and the second power end is connected with a negative pole CN-of the energy storage power supply.
The simulation system further comprises an energy storage timing loop, an opening and closing control loop, an opening and closing operation loop, a closing operation loop and a current and voltage breaking control loop which are connected in parallel between the first power end and the second power end.
The system is characterized in that each loop is respectively provided with a relay coil and a contact of a relay, and mutual control is realized among the loops through actions of the relay instead of realizing control logic through an integrated circuit.
Specifically, the simulation system comprises an energy storage time relay KT1, a relay KA2, a relay KA3 and a relay KA4.
Wherein:
the energy storage timing loop is used for simulating the energy storage action of the circuit breaker and sending an energy storage completion signal to the closing operation loop: the normally closed contact KA2-1 of the relay KA2 and the normally closed contact KA3-1 of the relay KA3 are connected in parallel and then connected in series with the coil of the energy storage time relay KT 1. The energy storage timing loop further comprises an energy storage coil L which is connected with the energy storage time relay KT1 in parallel.
The opening operation loop and the closing operation loop are respectively used for sending opening operation signals and closing operation signals to the opening and closing control loop: the switching-off operation loop comprises a switching-off normally open button SB1, normally open contacts KA1-2 of a relay KA1 and coils of a relay KA4 which are sequentially connected in series along a first power end to a second power end. The switching-on operation loop comprises a switching-on normally open button SB2, a normally open contact KT1-1 of an energy storage time relay KT1, a normally closed contact KA2-2 of a relay KA2 and a coil of a relay KA3 which are sequentially connected in series along a first power end to a second power end.
Further, the brake-separating operation loop further comprises a brake-separating loop disconnection normally-closed button SB3 connected with the coil of the relay KA4 in series; the switching-on operation loop further comprises a switching-on loop disconnection normally-closed button SB4 connected with the coil of the relay KA3 in series.
Further, the second power end is also connected with a negative end HZ-of a closing signal and a negative end FZ-of a separating signal. The node between the normally open button SB1 and the normally open contact KA1-2 is also connected with the positive end FZ+ of the opening signal; the node between the normally open button SB2 and the normally open contact KT1-1 is also connected to the positive end HZ+ of the closing signal. Thus, the starting of the closing and opening can be operated not only by a manual button, but also by a signal.
The switching-on/off control loop is used for simulating the position signal change of the circuit breaker according to the switching-on operation signal and the switching-off operation signal, and sending the position signal to the switching-on operation loop, the switching-off operation loop and the current-voltage switching-off control loop: the coil of the relay KA2 is connected in series with the normally open contact KA1-4 of the relay KA1, then connected in parallel with the coil of the relay KA1, then connected in series with the normally open contact KA3-2 of the relay KA3 and the normally open contact KA1-1 of the relay KA1 which are connected in parallel, and then connected in series with the normally closed contact KA4-1 of the relay KA4.
Further, the switching control loop further comprises a position indicator lamp HL connected with the coil of the relay KA1 in parallel 2 。
The current-voltage breaking control loop is used for controlling breaking of external feeder terminal voltage and a current source according to the position signal.
The current and voltage breaking control loop comprises a coil of a current breaking relay KA5 and a coil of a voltage breaking relay KA6 which are connected in parallel, and normally open contacts KA2-4 of a relay KA2 connected in series with the two relays after being connected in parallel.
As shown in fig. 2, the device further comprises a separation and combination indicating bit module, wherein the separation and combination indicating bit module comprises a remote signaling public terminal yxom, a non-energy storage terminal WCN, a separation terminal FW and a combination terminal HW, and further comprises a contact KT1-2 of an energy storage time relay KT1 and a contact KA2-3 of a relay KA 2.
When the timing of the energy storage time relay is finished, the contacts KT1-2 disconnect the remote signaling public terminal YXCOM from the non-energy storage terminal WCN, otherwise, the two terminals are in a conducting state;
when the coil of the relay KA2 is powered on, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position combining terminal HW, and when the coil of the relay KA2 is powered off, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position dividing terminal FW.
As shown In fig. 3, a contact KA5-1 of the current breaking relay KA5 is used for switching connection states among an IA source side, an IA terminal side and an In source side, when a coil of the current breaking relay KA5 is In power failure, the contact KA5-1 communicates the IA source side with the In source side, and when the coil of the current breaking relay KA5 is In power failure, the contact KA5-1 communicates the IA source side with the IA terminal side.
The contact KA6-1 of the voltage breaking relay KA6 is used for switching the connection state between the UA source side and the UA terminal side, when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 disconnects the UA source side and the UA terminal side, and when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 communicates the UA source side with the UA terminal.
The simulation system also comprises an energy storage display loop connected between the first power end and the second power end, wherein the energy storage display loop comprises an indicator lamp HL connected in series 1 And a normally open contact KT1-2 of the energy storage time relay KT 1.
The working process of the simulation system is as follows:
and 1, defaulting to a brake-off and non-energy-storage state by the system. After the connection terminal is started, CN+ and CN-supply power, and as KA2-1 is a normally closed contact, the coil of the energy storage time relay KT1 is electrified to start energy storage timing. At this time, the normally open contact KA1-2 and the normally open contact KT1-1 are both in an open state, and the opening operation circuit and the closing operation circuit are both open, and at this time, the opening button SB1 and the closing button SB2 are both not operated or terminal control is not performed.
Step 2, after the energy storage is completed, the contacts KT1-1 and KT1-2 are closed, and an energy storage position indicator lamp HL 1 The on prompt is on to finish energy storage, the closing operation loop waits for closing after the closing button SB2 is pressed, and at the moment, the system is still in a separating brake state, but closing operation can be performed. The opening operation loop is still open, and the opening operation cannot be performed.
Step 3, when a closing button SB2 is pressed or a closing signal (HZ+) is applied by a terminal, a coil of a relay KA3 is powered on, a normally open contact KA3-2 is closed, a coil of a KA1 is powered on, the normally open contact KA1-1 is closed to finish self-locking, meanwhile, a KA1-4 is closed to enable the coil of the KA2 to be powered on, the system is switched to a closing state, and a closing indicator lamp HL is arranged 2 And (5) brightening.
Step 4, as the coil KA2 is powered on, the normally closed contact KA2-1 is disconnected, and the energy storage time relay KT1 is powered off; then, the normally closed contact KA2-2 is opened to disconnect the KA3 coil, at the moment, the normally closed contact KA3-1 is closed, the KT1 coil is electrified again to start energy storage timing, and an energy storage process is simulated; at this time, normally open contact KA1-2 is closed, and the opening operation circuit waits for the opening operation by pressing SB1, whereas in the closing operation circuit, since KA2-2 is opened, the closing operation cannot be performed.
And 5, when the opening button SB2 is pressed or an opening signal (FZ+) is applied from a terminal, the KA4 coil is powered on, the normally closed contact KA4-1 is disconnected, the coils KA1 and KA2 are powered off, and the system is switched to an opening state. At this time, the contact KA2-2 is closed, the contact KA1-2 is opened, the opening operation cannot be performed due to the opening of the KA1-2 in the opening operation loop, and the closing operation can be performed as long as the energy storage time relay KT1 completes timing again and the KT1-1 is closed in the closing operation loop.
The subsequent operation is cycled according to steps 2-5.
When the system is switched to a switching-off state or a switching-on state, the KA5 and KA6 coils lose/get electricity to control the on-off of external voltage and current, and meanwhile KA2-3 also controls to send out corresponding remote sensing signals. Similarly, when the state of the energy storage time relay changes, the KT1-2 also sends out corresponding remote sensing signals.
Claims (8)
1. A circuit breaker spring operated mechanism simulation system, characterized by: the energy storage timing circuit is connected in parallel between the first power supply end and the second power supply end, and comprises an opening and closing control circuit, an opening and closing operation circuit, a closing operation circuit and a current and voltage breaking control circuit;
each loop is respectively provided with a relay coil and a contact of the relay, and mutual control is realized between the loops through actions of the relay;
the energy storage timing loop is used for simulating the energy storage action of the circuit breaker and sending an energy storage completion signal to the closing operation loop;
the opening operation loop and the closing operation loop are respectively used for sending an opening operation signal and a closing operation signal to the opening and closing control loop;
the switching-on/off control loop is used for simulating the position signal change of the circuit breaker according to the switching-on operation signal and the switching-off operation signal, and sending the position signal to the switching-on operation loop, the switching-off operation loop and the current-voltage switching-off control loop;
the current and voltage breaking control loop is used for controlling breaking of external feeder terminal voltage and a current source according to the position signal;
the first power end is connected with an anode CN+ of the energy storage power supply, and the second power end is connected with a cathode CN-of the energy storage power supply;
the simulation system comprises an energy storage time relay KT1, a relay KA2, a relay KA3 and a relay KA4;
in the energy storage timing loop, a normally closed contact KA2-1 of a relay KA2 and a normally closed contact KA3-1 of a relay KA3 are connected in parallel and then connected in series with a coil of an energy storage time relay KT 1;
in the switching control loop, a coil of a relay KA2 is connected in series with a normally open contact KA1-4 of a relay KA1 and then connected in parallel with a coil of the relay KA1, then connected in series with a normally open contact KA3-2 of a relay KA3 and a normally open contact KA1-1 of the relay KA1 which are connected in parallel, and then connected in series with a normally closed contact KA4-1 of a relay KA4;
the switching-off operation loop comprises a switching-off normally open button SB1, normally open contacts KA1-2 of a relay KA1 and coils of a relay KA4 which are sequentially connected in series along a first power end to a second power end;
the switching-on operation loop comprises a switching-on normally open button SB2, a normally open contact KT1-1 of an energy storage time relay KT1, a normally closed contact KA2-2 of a relay KA2 and a coil of a relay KA3 which are sequentially connected in series along a first power end to a second power end.
2. The circuit breaker spring operated mechanism simulation system of claim 1 wherein: the current and voltage breaking control loop comprises a coil of a current breaking relay KA5 and a coil of a voltage breaking relay KA6 which are connected in parallel, and normally open contacts KA2-4 of a relay KA2 connected in series with the two relays after being connected in parallel;
the contact KA5-1 of the current breaking relay KA5 is used for switching connection states among an IA source side, an IA terminal side and an In source side, when a coil of the current breaking relay KA5 is In power failure, the contact KA5-1 is used for communicating the IA source side with the In source side, and when the coil of the current breaking relay KA5 is In power failure, the contact KA5-1 is used for communicating the IA source side with the IA terminal side;
the contact KA6-1 of the voltage breaking relay KA6 is used for switching the connection state between the UA source side and the UA terminal side, when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 disconnects the UA source side and the UA terminal side, and when the coil of the voltage breaking relay KA6 is in power failure, the contact KA6-1 communicates the UA source side with the UA terminal.
3. The circuit breaker spring operated mechanism simulation system of claim 1 wherein: the switching indicating bit module comprises a remote signaling public terminal YXCOM, a non-energy storage terminal WCN, a switching terminal FW and a switching terminal HW, and further comprises a contact KT1-2 of an energy storage time relay KT1 and a contact KA2-3 of a relay KA 2;
when the timing of the energy storage time relay is finished, the contacts KT1-2 disconnect the remote signaling public terminal YXCOM from the non-energy storage terminal WCN, otherwise, the two terminals are in a conducting state;
when the coil of the relay KA2 is powered on, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position combining terminal HW, and when the coil of the relay KA2 is powered off, the contact KA2-3 communicates the remote signaling public terminal YXCOM with the position dividing terminal FW.
4. The circuit breaker spring operated mechanism simulation system of claim 1 wherein: the second power end is also connected with a negative end HZ-of a closing signal and a negative end FZ-of a separating signal; the node between the normally open button SB1 and the normally open contact KA1-2 is also connected with the positive end FZ+ of the opening signal; the node between the normally open button SB2 and the normally open contact KT1-1 is also connected to the positive end HZ+ of the closing signal.
5. The circuit breaker spring operated mechanism simulation system of claim 1 wherein: the switching-off operation loop further comprises a switching-off loop disconnection normally closed button SB3 connected with the coil of the relay KA4 in series; the switching-on operation loop further comprises a switching-on loop disconnection normally-closed button SB4 connected with the coil of the relay KA3 in series.
6. The circuit breaker spring operated mechanism simulation system of any of claims 1 to 5 wherein: the energy storage timing loop further comprises an energy storage coil L which is connected with the energy storage time relay KT1 in parallel.
7. The circuit breaker spring operated mechanism simulation system of any of claims 1 to 5 wherein: the energy storage display circuit comprises an indicator lamp HL connected in series 1 And a normally open contact KT1-2 of the energy storage time relay KT 1.
8. The circuit breaker spring operated mechanism simulation system of any of claims 1 to 5 wherein: the switching control loop also comprises a position indicator lamp HL connected with the coil of the relay KA1 in parallel 2 。
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| CN204101652U (en) * | 2014-08-08 | 2015-01-14 | 国家电网公司 | Portable power brake test device |
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| CN203365563U (en) * | 2013-05-24 | 2013-12-25 | 国家电网公司 | Intelligent simulated circuit breaker |
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