CN211456660U - Multi-power output circuit breaker control protection device - Google Patents
Multi-power output circuit breaker control protection device Download PDFInfo
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- CN211456660U CN211456660U CN202020474541.9U CN202020474541U CN211456660U CN 211456660 U CN211456660 U CN 211456660U CN 202020474541 U CN202020474541 U CN 202020474541U CN 211456660 U CN211456660 U CN 211456660U
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Abstract
The utility model relates to a many power output circuit breaker control protection device, include: the direct current power supply circuit comprises a plurality of power supply electronic circuits connected in parallel and used for outputting direct currents with a plurality of voltage levels, a first input end of the direct current power supply circuit is connected with one end of an alternating current power supply input end, a second input end of the direct current power supply circuit is connected with the other end of the alternating current power supply input end, and a first output end of the direct current power supply circuit is connected with a switching-on and switching-off common contact of the circuit breaker; one end of the closing switch is connected with the second output end of the direct current power supply loop, and the other end of the closing switch is connected with a closing contact of the circuit breaker; one end of the opening switch is connected with the second output end of the direct current supply loop, and the other end of the opening switch is connected with the opening contact of the breaker. Therefore, the output power supplies in various forms are provided by arranging a plurality of parallel-connected power supply electronic circuits, and the debugging requirements of different circuit breakers can be met.
Description
Technical Field
The utility model relates to a circuit breaker protection technical field especially relates to a many power output circuit breaker control protection device.
Background
In urban rail transit traction power supply system, the circuit breaker is in the high-voltage live state, if direct to the operation of circuit breaker body, will bring certain potential safety hazard to operating personnel, consequently can realize the divide-shut brake of remote control circuit breaker through setting up control protection system usually to when the circuit breaker breaks down or abnormal state, send alarm signal by control protection system and inform relevant personnel or directly cut off the trouble region, thereby protect circuit breaker and personnel's safety, reduce the loss that the trouble brought.
The control protection system is generally powered by an alternating current power supply or a direct current power supply, the alternating current power supply is easy to supply, but the system can quit operation after power failure and cannot protect the circuit breaker any more; the direct current power supply needs to be realized by an alternating current-direct current inverter, but can be supplied by a storage battery after power failure to protect the circuit breaker, and is relatively stable. The specific selection of the control protection power supply form is set by a designer according to specific conditions.
Under the normal condition, urban rail transit pulls power supply system and can set up the power screen and supply power for control protection system, but at the debugging stage before equipment power transmission, formal power often has not been inserted yet, lead to control protection system unable to launch, and the access of formal power is all relatively back, in order to satisfy on-the-spot debugging requirement, need temporarily external access AC380V power to guarantee control protection system's normal power supply, and control protection system has certain requirement to the input power, often find needs, suitable interim power needs very big energy, can influence the debugging progress, and even power transmission time. Therefore, how to find a suitable temporary power supply to satisfy the debugging stage before the formal power supply is powered on is a problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a many power output circuit breaker control protection device can provide the output power of multiple form, satisfies the debugging requirement of different circuit breakers.
A multi-power output circuit breaker control protection device comprises: a direct current power supply loop, a closing switch and an opening switch, wherein,
the direct current power supply loop comprises a plurality of power supply loops connected in parallel and used for outputting direct currents with a plurality of voltage levels, a first input end of the direct current power supply loop is connected with one end of an alternating current power supply input end, a second input end of the direct current power supply loop is connected with the other end of the alternating current power supply input end, and a first output end of the direct current power supply loop is connected with a switching-on and switching-off common contact of the circuit breaker;
one end of the closing switch is connected with the second output end of the direct current power supply loop, and the other end of the closing switch is connected with a closing contact of the circuit breaker;
one end of the opening switch is connected with the second output end of the direct current supply loop, and the other end of the opening switch is connected with the opening contact of the breaker.
In one embodiment, the dc power supply circuit includes a first power supply sub-circuit including a first switch, a first relay, and a first rectification circuit, and a second power supply sub-circuit including a second switch, a second relay, and a second rectification circuit, wherein,
the first input end of the direct current power supply loop is connected with the first input end of the first rectifying circuit through a first switch and a first normally open contact of a first relay which are connected in parallel, a coil of the first relay and a first normally closed contact of a second relay in sequence, the second input end of the first rectifying circuit is connected with the second input end of the direct current power supply loop, the first output end of the first rectifying circuit is connected with the first output end of the direct current power supply loop through a second normally open contact of the first relay and a second normally closed contact of the second relay in sequence, and the second output end of the first rectifying circuit is connected with the second output end of the direct current power supply loop through a third normally open contact of the first relay and a third normally closed contact of the second relay in sequence;
the first input end of the direct current power supply loop sequentially passes through a second switch and a first normally open contact of a second relay which are connected in parallel, a coil of the second relay, a first normally closed contact of the first relay is connected with a first input end of a second rectifying circuit, a second input end of the second rectifying circuit is connected with a second input end of the direct current power supply loop, a first output end of the second rectifying circuit sequentially passes through a second normally open contact of the second relay, a second normally closed contact of the first relay is connected with a first output end of the direct current power supply loop, a second output end of the second rectifying circuit sequentially passes through a third normally open contact of the second relay, and a third normally closed contact of the first relay is connected with a second output end of the direct current power supply loop.
In one embodiment, the protection device further comprises a power switch, the power switch comprises a first sub-switch and a second sub-switch,
one end of the first sub-switch is connected with the first output end of the direct current power supply loop, and the other end of the first sub-switch is connected with the opening and closing common contact of the circuit breaker;
one end of the second sub-switch is connected with the second output end of the direct current supply loop, and the other end of the second sub-switch is respectively connected with one end of the closing switch and one end of the opening switch.
In one embodiment, the protection device further comprises a dc voltmeter connected in parallel between the first output terminal of the dc supply loop and the second output terminal of the dc supply loop.
In one embodiment, the protection device further includes a delay control loop, a first input end of the delay control loop is connected to one end of the input end of the ac power supply, a second input end of the delay control loop is connected to the other end of the input end of the ac power supply, and an output end of the delay control loop is connected to a switch cabinet closing loop corresponding to the circuit breaker, a switch cabinet tripping loop corresponding to the circuit breaker, and a switch cabinet tripping loop corresponding to a previous-stage circuit breaker of the circuit breaker.
In one embodiment, the delay control loop includes a third switch, a third relay, a first time relay, a second time relay, and a third time relay, wherein,
the first input end of the delay control loop is connected with the second input end of the delay control loop through a third switch and a first normally open contact of a third relay, a coil of the third relay, a coil of a first time relay and a delay normally closed contact of a second time relay which are connected in parallel in sequence, and the coil of the first time relay and the delay normally closed contact of the second time relay are connected in series and then are connected with the coil of the second time relay and the coil of the third time relay in parallel;
the switch cabinet closing circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact of first time relay, and the switch cabinet tripping circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact of second time relay, and the switch cabinet tripping circuit that last one-level circuit breaker that the circuit breaker was connected at the both ends of the time delay normally open contact of third time relay corresponds links to each other respectively.
In one embodiment, the protection device further comprises an ac supply circuit comprising a fourth switch and a fourth relay, wherein,
and a second normally open contact of the fourth relay is connected in series between one end of the input end of the alternating current power supply and the first input end of the delay control loop.
In one embodiment, the normally closed contact of the fourth relay is connected in series between one end of the input end of the alternating current power supply and the first input end of the direct current power supply loop.
In one embodiment, the protection device further comprises a fifth switch, one end of the fifth switch is connected with one end of the input end of the alternating current power supply, and the other end of the fifth switch is connected with the first normally open contact of the fourth relay, the second normally open contact of the fourth relay and the normally closed contact of the fourth relay.
In one embodiment, the protection device further comprises an alternating current voltmeter, and the alternating current voltmeter is connected in series with the third normally-open contact of the fourth relay between one end of the alternating current power supply input end and the other end of the alternating current power supply input end.
The control protection device of the multi-power-supply output circuit breaker comprises a direct-current power supply loop, a closing switch and a breaking switch, wherein the direct-current power supply loop comprises a plurality of power supply electronic loops which are connected in parallel and used for outputting direct currents with a plurality of voltage levels; one end of the closing switch is connected with the second output end of the direct current power supply loop, and the other end of the closing switch is connected with a closing contact of the circuit breaker; one end of the opening switch is connected with the second output end of the direct current power supply loop, and the other end of the opening switch is connected with the opening contact of the circuit breaker. Therefore, the output power supplies in various forms are provided by arranging a plurality of parallel-connected power supply electronic circuits, and the debugging requirements of different circuit breakers can be met.
Drawings
Fig. 1 is a schematic diagram of a control protection device of a multi-power output circuit breaker in a first embodiment;
fig. 2 is a schematic diagram of a control protection device of a multi-power output circuit breaker in a second embodiment;
fig. 3 is a schematic diagram of a control protection device of a multi-power output circuit breaker in a third embodiment;
fig. 4 is a schematic diagram of a control protection device of a multi-power output circuit breaker in a fourth embodiment;
fig. 5 is a schematic diagram of a control protection device of a multi-power output circuit breaker in a fifth embodiment;
fig. 6-9 are external structural views of a multi-power output circuit breaker control protection device in one embodiment.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Fig. 1 is a schematic diagram of a multi-power output circuit breaker control protection apparatus in an embodiment, and referring to fig. 1, the multi-power output circuit breaker control protection apparatus includes: the circuit comprises a direct current supply loop 10, a closing switch AH6 and a separating switch AH7, wherein the direct current supply loop 10 comprises a plurality of electronic supply loops connected in parallel and used for outputting direct currents with a plurality of voltage levels, a first input end of the direct current supply loop 10 is connected with one end A of an alternating current power supply input end, a second input end of the direct current supply loop 10 is connected with the other end N of the alternating current power supply input end, and a first output end KM-of the direct current supply loop 10 is connected with a common opening and closing contact of a circuit breaker; one end of a closing switch AH6 is connected with a second output end KM + of the direct current supply loop 10, and the other end of the closing switch AH6 is connected with a closing contact of the breaker; one end of the opening switch AH7 is connected to the second output KM + of the dc supply loop 10, and the other end of the opening switch AH7 is connected to the opening contact of the circuit breaker.
Specifically, the dc power supply circuit 10 is mainly used for providing dc power for the switching test of the circuit breaker body, and the dc power supply circuit 10 may include a plurality of power supply circuits connected in parallel to provide a plurality of different dc powers, such as 220VDC, 110VDC, etc., so as to meet the test requirements of different circuit breakers. The closing switch AH6 is mainly used for closing tests of the breaker body, can be a button switch, and the opening switch AH7 is mainly used for opening tests of the breaker body, and can also be a button switch, and the specific type is not limited here.
When the opening and closing tests are carried out, an appropriate power supply electronic loop is selected to work according to the type of the breaker to output corresponding direct current to the breaker body, then the closing switch AH6 is pressed to enable the closing switch AH6 to be located at the closing position, the closing test of the breaker body is carried out to determine whether the closing contact of the breaker is located at the correct position and whether the breaker can be normally closed, and after the test is completed, the closing switch AH6 is pressed again to enable the closing switch AH6 to be located at the opening position. Next, the opening switch AH7 is pressed to be in the closed position, so as to perform an opening test of the circuit breaker body, so as to determine whether the opening contact of the circuit breaker is in the correct position and whether the circuit breaker can be normally opened, and after the test is completed, the opening switch AH7 is pressed again to be in the open position.
In this embodiment, provide the output power of multiform through setting up a plurality of parallel connection's supply electronic circuit, can satisfy the divide-shut brake debugging requirement of different circuit breaker bodies, and the alternating current of input can be 220VAC, belongs to the power supply grade of conventional use, and the scene generally all has the setting, can choose for use on the spot, and prior art passes through the power screen power supply, needs 380VAC, all has certain requirement to power supply grade and capacity.
In one embodiment, with continued reference to fig. 1, the dc power supply loop 10 includes a first power supply sub-loop including a first switch AH1, a first relay, and a first rectifying circuit DY1, and a second power supply sub-loop including a second switch AH2, a second relay, and a second rectifying circuit DY 2.
The first input end of the direct-current power supply loop 10 is connected with the first input end of a first rectifying circuit DY1 through a first switch AH1 and a first normally open contact ZJ11 of a first relay, a coil ZJ1 of the first relay and a first normally closed contact ZJ2B1 of a second relay which are connected in parallel in sequence, the second input end of the first rectifying circuit DY1 is connected with the second input end of the direct-current power supply loop 10, the first output end of the first rectifying circuit DY1 is connected with the first output end KM-of the direct-current power supply loop 10 through a second normally open contact ZJ12 of the first relay and a second normally closed contact ZJ2B2 of the second relay in sequence, and the second output end of the first rectifying circuit DY1 is connected with the second output end KM + of the direct-current power supply loop 10 through a third normally open contact ZJ13 of the first relay and a third normally closed contact ZJ2B3 of the second relay in sequence.
The first input end of the direct current power supply loop 10 is connected with the first input end of a second rectifying circuit DY2 through a second switch AH2 and a first normally open contact ZJ21 of a second relay, a coil ZJ2 of the second relay, and a first normally closed contact ZJ1B1 of the first relay in parallel, the second input end of the second rectifying circuit DY2 is connected with the second input end of the direct current power supply loop 10, the first output end of the second rectifying circuit DY2 is connected with the first output end KM-of the direct current power supply loop 10 through a second normally open contact ZJ22 of the second relay, and a second normally closed contact ZJ1B2 of the first relay, and the second output end of the second rectifying circuit DY2 is connected with the second output end KM + of the direct current power supply loop 10 through a third normally open contact ZJ23 of the second relay and a third normally closed contact ZJ1B3 of the first relay in sequence.
Specifically, the first rectifying circuit DY1 is mainly used to convert ac power at the ac power input end into a first dc power such as 110V, the second rectifying circuit DY2 is mainly used to convert ac power at the ac power input end into a second dc power such as 220V, the ac power at the ac power input end may be 220V, correspondingly, the first rectifying circuit DY1 may be a rectifying circuit with an input of 220VAC and an output of 110VDC, and the second rectifying circuit DY2 may be a rectifying circuit with an input of 220VAC and an output of 220VDC, which may be specifically selected according to actual requirements. The first switch AH1 is mainly used for switching on the first power supply loop, the second switch AH2 is mainly used for switching on the second power supply loop, and the first switch AH1 and the second switch AH2 can be button switches. The first relay is mainly used for self-locking of the first power supply electronic circuit and locking of the second power supply electronic circuit, and comprises a coil, a plurality of normally open contacts and a plurality of normally closed contacts, and the second relay is mainly used for self-locking of the second power supply electronic circuit and locking of the first power supply electronic circuit and comprises a coil, a plurality of normally open contacts and a plurality of normally closed contacts.
When the opening and closing tests are carried out, when the first switch AH1 is pressed, the coil ZJ1 of the first relay is electrified, the first normally open contact ZJ11 of the first relay is closed, the first power supply circuit is self-locked, and the first rectifying circuit DY1 works and outputs first direct current. Meanwhile, the second normally open contact ZJ12 of the first relay and the third normally open contact ZJ13 of the first relay are closed, and the first direct current is transmitted to the first output end KM-and the second output end KM + of the direct current supply loop 10. Meanwhile, the first normally closed contact ZJ1B1 of the first relay, the second normally closed contact ZJ1B2 of the first relay and the third normally closed contact ZJ1B3 of the first relay are disconnected, and the second power supply circuit is disconnected to form an interlock, so that the two power supply circuits are prevented from working simultaneously.
When the second switch AH2 is pressed, the coil ZJ2 of the second relay is electrified, the first normally open contact ZJ21 of the second relay is closed, the second power supply circuit is self-locked, and the second rectifying circuit DY2 works and outputs second direct current. Meanwhile, the second normally open contact ZJ22 of the second relay and the third normally open contact ZJ23 of the second relay are closed, and the second direct current is transmitted to the first output end KM-and the second output end KM + of the direct current supply loop 10. Meanwhile, the first normally closed contact ZJ2B1 of the second relay, the second normally closed contact ZJ2B2 of the second relay and the third normally closed contact ZJ2B3 of the second relay are disconnected, the first power supply electronic circuit is disconnected, and an interlock is formed, so that the two power supply electronic circuits are prevented from working simultaneously.
In this embodiment, through setting up different confession electronic circuit to through setting up auto-lock and interlocking function, not only can provide different direct currents and give the circuit breaker body, satisfy different circuit breaker test demands, can guarantee the security and the stability of power supply moreover.
In one embodiment, referring to fig. 2, the multi-power-supply-output circuit breaker control protection device further comprises a power switch ZK, wherein the power switch ZK comprises a first sub-switch ZK1 and a second sub-switch ZK2, one end of the first sub-switch ZK1 is connected to the first output terminal KM-of the dc power supply loop 10, and the other end of the first sub-switch ZK1 is connected to the common switch-closing contact of the circuit breaker; one end of the second sub-switch ZK2 is connected to the second output terminal KM + of the dc power supply loop 10, and the other end of the second sub-switch ZK2 is connected to one end of the closing switch AH6 and one end of the opening switch AH7, respectively.
Specifically, the power switch ZK is mainly used to control the output of the direct current, and may be a double-pole double-throw switch, or one or two single-pole single-throw switches, which is not limited herein. In one embodiment, the other end of the first switch ZK1 is further connected to one end of a dc load, such as the negative terminal of a dc motor power supply, and the other end of the second sub-switch ZK2 is further connected to the other end of the dc load, such as the positive terminal of the dc motor power supply, to supply power to the dc load. When the breaker is subjected to a switch-on and switch-off test, the first switch AH 1/the second switch AH2 can be pressed to enable the direct current power supply loop 10 to work and output corresponding direct current, then the power switch ZK is turned on to supply power to a direct current load, finally the switch-on switch AH6 is pressed to be located at the closed position to perform a switch-on test of the breaker, after the switch-on test is finished, the switch-on switch AH6 is pressed to be located at the open position, then the switch-off switch AH7 is pressed to be located at the closed position to perform a switch-off test of the breaker, and after the switch-off test is finished, the switch-off switch AH7 is pressed to be located at the open position, then the power switch ZK is turned off to stop supplying power to the direct current load.
In practical application, the connection between the protection device and the breaker body and the direct current load can be realized through a five-core aviation plug, as shown in fig. 2, the five-core aviation plug comprises five terminals, a first internal terminal XT21 and a fourth terminal XT24 are both connected with the other end of a first sub-switch ZK1, a second terminal XT22 is connected with the other end of a closing switch AH6, a third terminal XT23 is connected with the other end of a separating switch AH7, and a fifth terminal XT25 is connected with the other end of a second sub-switch ZK 2.
In one embodiment, with continued reference to fig. 2, the multi-power-supply-output circuit breaker control protection device further includes a dc voltage meter V1, wherein the dc voltage meter V1 is connected in parallel between the first output KM "of the dc power supply circuit 10 and the second output KM + of the dc power supply circuit 10 to provide corresponding voltage information to the operator.
In one embodiment, referring to fig. 3, the multi-power output circuit breaker control protection device further includes a delay control circuit 20, a first input end of the delay control circuit 20 is connected to one end a of the input end of the ac power supply, a second input end of the delay control circuit 20 is connected to the other end N of the input end of the ac power supply, and an output end of the delay control circuit 20 is connected to a switch cabinet closing circuit corresponding to the circuit breaker, a switch cabinet trip circuit corresponding to the circuit breaker, and a switch cabinet trip circuit corresponding to a previous-stage circuit breaker of the circuit breaker, respectively.
Specifically, after the electrified railway/subway contact network is powered on, a short-circuit test needs to be performed on a power supply line to test whether a protection device reliably acts or not, so that a fault line is correctly cut off, when the short-circuit test is performed, an operator needs to go to the site to realize short circuit through the closing operation of a circuit breaker, instantaneous large current can pass through the circuit breaker when the circuit breaker is closed, and the operator cannot leave the periphery of the circuit breaker immediately after the closing operation, so that the risk of electric shock is caused.
Therefore, the short circuit loop is switched on in a delayed mode by arranging the delay control loop 20, so that the leaving time is reserved for the operating personnel, and the risk of electric shock of the operating personnel is reduced. Meanwhile, the time delay control circuit 20 delays to switch on the switch cabinet tripping circuit corresponding to the breaker, and delays to send a tripping command to the breaker, so as to prevent the switch cabinet protection device corresponding to the breaker from losing efficacy and causing harm to the breaker and a circuit, and delays to switch on the switch cabinet tripping circuit corresponding to the previous stage breaker of the breaker, and delays to send a tripping command to the previous stage breaker, so as to prevent the circuit breaker from refusing to cause harm to the breaker and the circuit, thereby through two-stage time delay setting, under the condition that the circuit breaker cannot be tripped at the current stage, the circuit breaker jumps to the previous stage, and thus the safety of operators and equipment is ensured.
In one embodiment, as shown with continued reference to fig. 3, the delay control loop 20 includes a third switch AH3, a third relay, a first time relay, a second time relay, and a third time relay, wherein a first input terminal of the delay control loop 20 is connected to a second input terminal of the delay control loop 20 sequentially through the third switch AH3 and a first normally open contact ZJ31 of the third relay, a coil ZJ3 of the third relay, a coil SJ1 of the first time relay, and a delay normally closed contact SJ2B of the second time relay, which are connected in parallel, and after being connected in series, a coil SJ1 of the first time relay and a coil SJ2B of the second time relay are also connected in parallel to a coil SJ2 of the second time relay and a coil SJ3 of the third time relay; the switch cabinet closing circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact SJ11 of first time relay, and the switch cabinet tripping circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact SJ21 of second time relay, and the switch cabinet tripping circuit that last one-level circuit breaker that the circuit breaker was connected at the both ends of the time delay normally open contact SJ31 of third time relay corresponds links to each other respectively.
Specifically, take an example that the switch cabinet corresponding to the breaker is a 1500V dc switch cabinet, and the switch cabinet corresponding to the previous stage breaker of the breaker is a 35KV high voltage switch cabinet. The time delay normally open contact SJ11 of the first time relay is connected with a closing knob of the 1500V direct-current switch cabinet in parallel, the time delay normally open contact SJ21 of the second time relay is connected with a breaking knob of the 1500V direct-current switch cabinet in parallel, and the time delay normally open contact SJ31 of the third time relay is connected with an over-temperature tripping knob of the 35KV high-voltage switch cabinet in parallel. In practical application, the connection between the time delay normally-open contact of the time relay and the switch cabinet can be realized through a six-core aviation plug, as shown in fig. 3, the six-core aviation plug comprises six terminals, wherein a first terminal XT11 and a second terminal XT12 are correspondingly connected with two ends of a time delay normally-open contact SJ11 of the first time relay, a third terminal XT13 and a fourth terminal XT14 are correspondingly connected with two ends of a time delay normally-open contact SJ21 of the second time relay, and a fifth terminal XT15 and a sixth terminal XT16 are correspondingly connected with two ends of a time delay normally-open contact SJ31 of the third time relay.
When a short-circuit test is carried out, delay time of a first time relay, a second time relay and a third time relay is set, in principle, the delay time of the first time relay is set to be evacuation time of an operator, the delay time of the second time relay is set to be opening time of a circuit breaker, the delay time of the third time relay is set to be opening time of a previous stage of circuit breaker of the circuit breaker, and the delay time of the third time relay is the sum of the delay time of the second time relay and 0.1S. In some embodiments, the delay time of the first time relay, the second time relay and the third time relay can be 0-60 s.
After the setting is finished, the third switch AH3 is pressed to be located at the closed position, the coil ZJ3 of the third relay is electrified, the first normally open contact ZJ31 of the third relay is closed to form self-locking, the coil SJ1 of the first time relay, the coil SJ2 of the second time relay and the coil SJ3 of the third time relay are electrified, and all the time relays sequentially act according to the set delay time. The time delay normally open contact SJ11 of the first time relay is closed firstly, so that a 1500V direct-current switch cabinet closing loop is switched on, a closing command is sent to the breaker, and the breaker is closed; after the circuit breaker completes the closing, a time-delay normally-open contact SJ21 of the second time relay is closed to enable a switching-off loop of the 1500V direct-current switch cabinet to be connected, a switching-off command is sent to the circuit breaker, the circuit breaker is switched off, and meanwhile, a time-delay normally-closed contact SJ2B of the second time relay is disconnected to stop sending a closing command to the circuit breaker; and a time-delay normally-open contact SJ31 of the third time relay is closed, so that an overtemperature tripping loop of the 35KV high-voltage switch cabinet is switched on, a switching-off command is sent to a previous-stage circuit breaker of the circuit breaker, and the previous-stage circuit breaker of the circuit breaker is switched off.
In the embodiment, by arranging the delay control loop, after the delay output is set for a place with a delay requirement, sufficient leaving time can be reserved for an operator, the risk of electric shock of the operator is reduced, and meanwhile, by the two-stage delay switching-off arrangement, the upper-stage switch can be tripped under the condition that the switching-off of the current stage cannot be carried out, so that the safety of the operator, equipment and a circuit in the short-circuit test process is ensured.
In one embodiment, referring to fig. 4, the multi-power-supply-output circuit breaker control protection device further includes an ac power supply circuit 30, and the ac power supply circuit 30 includes a fourth switch AH4 and a fourth relay, wherein the fourth switch AH4 and a first normally-open contact ZJ41 of the fourth relay are connected in parallel and then connected in series with a coil ZJ4 of the fourth relay between one end a of the ac power supply input end and the other end N of the ac power supply input end, and a second normally-open contact ZJ42 of the fourth relay is connected in series between one end a of the ac power supply input end and the first input end of the delay control circuit 20.
Specifically, the ac power supply circuit 30 is mainly used for power supply control of the delay control circuit 20, and as shown in fig. 4, when a short circuit test is performed, the fourth switch AH4 may be pressed to be located at a closed position, the coil ZJ4 of the fourth relay is powered on, the first normally open contact ZJ41 of the fourth relay is closed to form self-locking, meanwhile, the second normally open contact ZJ42 of the fourth relay is closed, the first input end of the delay control circuit 20 is connected to one end a of the ac power supply input end, and ac power is supplied to the delay control circuit 20.
In one embodiment, the normally closed contact ZJ4B of the fourth relay is connected in series between the end a of the ac power input end and the first input end of the dc power supply circuit 10 to form an interlock, so as to ensure that no dc power is supplied to the circuit breaker body during the short circuit test, thereby ensuring the safety of the test.
In one embodiment, referring to fig. 5, the multi-power-supply-output-circuit-breaker-control protection device further includes a fifth switch AH5, one end of the fifth switch AH5 is connected to one end a of the ac power supply input terminal, and the other end of the fifth switch AH5 is connected to the first normally-open contact ZJ41 of the fourth relay, the second normally-open contact ZJ42 of the fourth relay, and the normally-closed contact ZJ4B of the fourth relay. The fifth switch AH5 acts as a master switch and may be a push button switch, and when the fifth switch AH5 is depressed to the off position, all circuits are de-energized, providing an emergency stop.
In one embodiment, with continued reference to fig. 5, the multi-power-supply-output circuit breaker control protection device further includes an ac voltmeter V2, and the ac voltmeter V2 and the third normally-open contact ZJ43 of the fourth relay are connected in series between the one end a of the ac power input terminal and the other end N of the ac power input terminal to provide corresponding voltage information to the operator.
In one embodiment, the multiple power output circuit breaker control protection device further includes a housing 40, each of the above components is disposed in the housing 40, and the housing 40 is provided with a mounting hole for mounting the corresponding component in the mounting hole, which is shown in fig. 6 and will not be described in detail herein. Further, referring to fig. 7-9, the multi-power-supply-output circuit breaker control protection device further includes a fan 50, a handle 60 and a support frame 70, wherein the fan 50 is used for dissipating heat of the whole protection device, the handle 60 is convenient for a user to carry, and the support frame 70 is used for supporting the whole protection device to a certain angle, so as to facilitate an operator to operate and observe the device.
It should be noted that, when the present application is described in detail, a circuit breaker of an urban rail transit traction power supply system is mainly taken as an example for description, and an operation panel and a voltage class are also set by taking the urban rail transit traction power supply system as an example. Aiming at the time delay design of the short circuit test, the corresponding setting is only required to be changed according to the power input and output requirements of different systems.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A multi-power output circuit breaker control protection device is characterized by comprising: a direct current power supply loop, a closing switch and an opening switch, wherein,
the direct current power supply circuit comprises a plurality of power supply circuits connected in parallel and used for outputting direct currents with a plurality of voltage levels, a first input end of the direct current power supply circuit is connected with one end of an input end of an alternating current power supply, a second input end of the direct current power supply circuit is connected with the other end of the input end of the alternating current power supply, and a first output end of the direct current power supply circuit is connected with a switching-on and switching-off common contact of the circuit breaker;
one end of the closing switch is connected with the second output end of the direct current power supply loop, and the other end of the closing switch is connected with a closing contact of the circuit breaker;
one end of the opening switch is connected with the second output end of the direct current supply loop, and the other end of the opening switch is connected with the opening contact of the breaker.
2. The multi power supply output circuit breaker control protection device according to claim 1, wherein the DC power supply circuit includes a first power supply sub-circuit including a first switch, a first relay and a first rectifying circuit, and a second power supply sub-circuit including a second switch, a second relay and a second rectifying circuit, wherein,
the first input end of the direct current power supply loop is connected with the first input end of the first rectifying circuit through the first switch and the first normally open contact of the first relay, the coil of the first relay and the first normally closed contact of the second relay which are connected in parallel in sequence, the second input end of the first rectifying circuit is connected with the second input end of the direct current power supply loop, the first output end of the first rectifying circuit is connected with the first output end of the direct current power supply loop through the second normally open contact of the first relay and the second normally closed contact of the second relay in sequence, and the second output end of the first rectifying circuit is connected with the second output end of the direct current power supply loop through the third normally open contact of the first relay and the third normally closed contact of the second relay in sequence;
the first input end of the direct current power supply loop is connected with the first input end of the second rectifying circuit through the second switch, the first normally open contact of the second relay, the coil of the second relay and the first normally closed contact of the first relay which are connected in parallel in sequence, the second input end of the second rectifying circuit is connected with the second input end of the direct current power supply loop, the first output end of the second rectifying circuit is connected with the first output end of the direct current power supply loop through the second normally open contact of the second relay and the second normally closed contact of the first relay in sequence, and the second output end of the second rectifying circuit is connected with the second output end of the direct current power supply loop through the third normally open contact of the second relay and the third normally closed contact of the first relay in sequence.
3. The multi power supply output circuit breaker control protection device according to claim 2, wherein the protection device further comprises a power switch including a first sub-switch and a second sub-switch,
one end of the first sub-switch is connected with a first output end of the direct current power supply loop, and the other end of the first sub-switch is connected with a switching-on and switching-off common contact of the circuit breaker;
one end of the second sub-switch is connected with the second output end of the direct current power supply loop, and the other end of the second sub-switch is connected with one end of the closing switch and one end of the opening switch respectively.
4. A multi-power-supply-output-circuit-breaker-control protection device according to claim 1, characterized in that it further comprises a dc voltmeter connected in parallel between the first output of the dc supply loop and the second output of the dc supply loop.
5. The control protection device for the multi-power-supply output circuit breaker according to claim 1, further comprising a delay control circuit, wherein a first input end of the delay control circuit is connected with one end of the input end of the alternating current power supply, a second input end of the delay control circuit is connected with the other end of the input end of the alternating current power supply, and an output end of the delay control circuit is connected with a switch cabinet closing circuit corresponding to the circuit breaker, a switch cabinet tripping circuit corresponding to the circuit breaker and a switch cabinet tripping circuit corresponding to a previous-stage circuit breaker of the circuit breaker respectively.
6. The multi power supply output circuit breaker control protection device of claim 5, wherein the delay control loop includes a third switch, a third relay, a first time relay, a second time relay, and a third time relay, wherein,
the first input end of the delay control loop is connected with the second input end of the delay control loop through the third switch and the first normally open contact of the third relay, the coil of the first time relay and the delay normally closed contact of the second time relay which are connected in parallel in sequence, and the coil of the first time relay and the delay normally closed contact of the second time relay are connected in series and then are connected with the coil of the second time relay and the coil of the third time relay in parallel;
the switch cabinet tripping circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact of first time relay, the switch cabinet combined floodgate return circuit that the circuit breaker corresponds is connected at the both ends of the time delay normally open contact of second time relay, the switch cabinet tripping circuit that last level circuit breaker of circuit breaker corresponds is connected at the both ends of the time delay normally open contact of third time relay respectively links to each other.
7. The multi power supply output circuit breaker control protection device according to claim 5, further comprising an AC supply loop including a fourth switch and a fourth relay, wherein,
and the fourth switch is connected with a first normally open contact of the fourth relay in parallel and then is connected with a coil of the fourth relay in series between one end of the input end of the alternating current power supply and the other end of the input end of the alternating current power supply, and a second normally open contact of the fourth relay is connected in series between one end of the input end of the alternating current power supply and the first input end of the time delay control loop.
8. A multi-power-supply-output-circuit-breaker-control-protection device according to claim 7, wherein the normally-closed contact of the fourth relay is connected in series between one end of the ac power supply input terminal and the first input terminal of the dc power supply loop.
9. A multi-power-supply-output-circuit-breaker-controlled protection device according to claim 8, further comprising a fifth switch, one end of which is connected to one end of the ac power supply input terminal, and the other end of which is connected to the first normally open contact of the fourth relay, the second normally open contact of the fourth relay, and the normally closed contact of the fourth relay.
10. A multi power supply output circuit breaker control protection device according to claim 7, further comprising an ac voltmeter connected in series with the third normally open contact of the fourth relay between one end of the ac power supply input and the other end of the ac power supply input.
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| CN202020474541.9U CN211456660U (en) | 2020-04-02 | 2020-04-02 | Multi-power output circuit breaker control protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331504A (en) * | 2020-10-26 | 2021-02-05 | 中车南京浦镇车辆有限公司 | Rail vehicle generating line circuit breaker control circuit |
| CN115877201A (en) * | 2023-03-09 | 2023-03-31 | 广东正超电气有限公司 | Break-in test power supply vehicle of switch cabinet breaker |
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2020
- 2020-04-02 CN CN202020474541.9U patent/CN211456660U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331504A (en) * | 2020-10-26 | 2021-02-05 | 中车南京浦镇车辆有限公司 | Rail vehicle generating line circuit breaker control circuit |
| WO2022088260A1 (en) * | 2020-10-26 | 2022-05-05 | 中车南京浦镇车辆有限公司 | Rail vehicle bus bar circuit breaker control circuit |
| CN112331504B (en) * | 2020-10-26 | 2023-08-25 | 中车南京浦镇车辆有限公司 | Control circuit of bus breaker of railway vehicle |
| US11807133B2 (en) | 2020-10-26 | 2023-11-07 | Crrc Nanjing Puzhen Co., Ltd. | Bus breaker control circuit for railway vehicle |
| CN115877201A (en) * | 2023-03-09 | 2023-03-31 | 广东正超电气有限公司 | Break-in test power supply vehicle of switch cabinet breaker |
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