CN106940390B - Insulation detection switching device of direct current system - Google Patents
Insulation detection switching device of direct current system Download PDFInfo
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- CN106940390B CN106940390B CN201710079203.8A CN201710079203A CN106940390B CN 106940390 B CN106940390 B CN 106940390B CN 201710079203 A CN201710079203 A CN 201710079203A CN 106940390 B CN106940390 B CN 106940390B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention relates to the technical field of insulation monitoring devices of direct current systems of transformer substations, in particular to an insulation detection switching device of a direct current system, which comprises a shell, an insulation detection relay, an intermediate relay and a wiring terminal board. The invention has reasonable and compact structure and convenient use, can complete the basic functions of the existing direct current insulation detector, realize short-time replacement of the direct current insulation detector, simultaneously send alarm signals to the on-site alarm device and the remote measurement and control device, shorten the power failure time caused by the abnormality of the direct current system, ensure the normal operation of the direct current system of the transformer substation and improve the electricity reliability.
Description
Technical Field
The invention relates to the technical field of insulation monitoring devices of direct current systems of substations, in particular to an insulation detection switching device of a direct current system.
Background
The substation direct current system refers to a system for providing direct current power supply for signal equipment, protection, automatic devices, accident lighting and breaker opening and closing operation devices in a substation. The direct current system of the transformer substation is connected with relay protection, a signal device, an automatic device, a terminal box of an indoor distribution device, an operating mechanism and the like, so that the direct current system is complex, the ground fault is more likely to happen, if the direct current system is grounded at the positive electrode, a tripping coil of an electromagnetic operating mechanism is usually connected with a negative electrode power supply, if the circuits are grounded again or are in poor insulation, a protection misoperation is caused, if the negative electrode of the direct current system is grounded at the negative electrode, if a point of grounding happens in the circuits, the tripping circuit or the switching circuit is likely to be short-circuited, the protection circuit or the circuit breaker is refused, the relay is burnt, the fuse is fused, and the like, the influence on the safe operation and the power supply reliability of the whole power system and the power grid equipment is great, and even large-area power failure is caused, and great economic loss is caused. Therefore, the dc system needs to be provided with an insulation monitoring device to monitor the insulation condition to the ground.
The insulation monitoring device of the existing transformer substation direct current system is usually a direct current insulation detector, and can be respectively connected with an on-site alarm device and a measurement and control device to realize on-site alarm and remote measurement and control alarm. The direct current insulation detector is used as an integrated power supply system and a core part of the direct current power supply system, the normal operation of the whole direct current system in a transformer substation can be influenced by the occurrence of abnormality or device faults, for example, the drifting of direct current voltage caused by the faults of a balance resistance bridge module is unstable, the direct current grounding faults cannot be reported when the insulation detection module breaks down, and the like.
Disclosure of Invention
The invention provides an insulation detection switching device of a direct current system, which overcomes the defects of the prior art and can effectively solve the problems of long power failure time, low reliability and potential safety hazard of primary equipment of a direct current system of a transformer substation in an unprotected state due to longer arrival period or repair period of spare parts after the direct current insulation detector of a power supply unit in the existing remote area fails.
The technical scheme of the invention is realized by the following measures: the utility model provides a direct current system insulation detects switching device, which comprises a housin, insulation detection relay, intermediate relay and binding post board fixed mounting are in the casing, insulation detection relay front side is located the casing front end, the binding post board is located casing left side end or right side end or rear side end, insulation detection relay includes detector binding post and detector signal terminal, detector binding post is connected with the binding post board electricity, detector signal terminal passes through intermediate relay and is connected with the binding post board electricity, the last access contact that can be connected with direct current system positive bus, direct current system negative bus, the female row electricity of ground, the last output contact that can be connected with local alarm device, measurement and control device electricity of binding post board.
The following are further optimizations and/or improvements to the above-described inventive solution:
the access contact may include an anode bus contact, a cathode bus contact and a ground contact, where the anode bus contact may be electrically connected to an anode bus of the dc system, the cathode bus contact may be electrically connected to a cathode bus of the dc system, and the ground contact may be electrically connected to a ground bus; the output contact may include an overrun voltage alarm first contact, an overrun voltage alarm second contact, an insulation alarm first contact, an insulation alarm second contact, an in-situ alarm first contact and an in-situ alarm second contact, the overrun voltage alarm first contact and the overrun voltage alarm second contact may be electrically connected to an overrun voltage signal terminal of the measurement and control device, the insulation alarm first contact and the insulation alarm second contact may be electrically connected to an insulation signal terminal of the measurement and control device, and the in-situ alarm first contact and the in-situ alarm second contact may be electrically connected to the in-situ alarm device.
The following are further optimizations and/or improvements to the above-described inventive solution:
the insulation detection relay can comprise an overvoltage/undervoltage alarm normally open contact and an insulation alarm normally open contact, wherein the detector wiring terminal comprises an anode wiring terminal, a cathode wiring terminal and a grounding electrode terminal, the detector signal terminal comprises an overvoltage/undervoltage contact first terminal, an overvoltage/undervoltage contact second terminal, an insulation contact first terminal and an insulation contact second terminal, the overvoltage/undervoltage alarm normally open contact can be closed when the bus voltage exceeds a preset overvoltage value or is lower than a preset undervoltage value, the insulation alarm normally open contact can be closed when the insulation resistance to ground is reduced, the anode wiring terminal is electrically connected with an anode bus contact, the cathode wiring terminal is electrically connected with a cathode bus contact, and the grounding electrode terminal is electrically connected with a grounding contact; the relay comprises a first negative electrode terminal of the relay, a second negative electrode terminal of the relay, a first positive electrode terminal of the relay, a second positive electrode terminal of the relay, a first coil of the relay, a second coil of the relay, a first normally open contact of the relay, a second normally open contact of the relay, a third normally open contact of the relay, a fourth normally open contact of the relay, a first connecting terminal of the relay, a second connecting terminal of the relay, a third connecting terminal of the relay, a fourth connecting terminal of the relay, a fifth connecting terminal of the relay, a sixth connecting terminal of the relay, a seventh connecting terminal of the relay, and an eighth connecting terminal of the relay, wherein the first connecting terminal of the relay and the second connecting terminal of the relay are respectively and electrically connected with two ends of the first normally open contact of the relay, the third connecting terminal of the relay, the fourth connecting terminal of the relay are respectively and electrically connected with two ends of the third normally open contact of the relay, and the first coil of the relay, the first normally open contact of the relay, the first coil of the relay, the second normally open contact of the relay, and the first normally open contact of the relay, the first coil of the relay and the second normally open contact of the relay are respectively; the positive electrode wiring terminal is electrically connected with the first insulating contact terminal, the first undervoltage contact terminal, the first relay wiring terminal and the fifth relay wiring terminal respectively, the negative electrode wiring terminal is electrically connected with the first negative electrode terminal of the relay, the second negative electrode terminal of the relay and the second local alarm contact respectively, the first local alarm contact is electrically connected with the second relay wiring terminal and the sixth relay wiring terminal respectively, the second undervoltage contact terminal is electrically connected with the first positive electrode terminal of the relay, the second insulating contact terminal is electrically connected with the second positive electrode terminal of the relay, the third relay wiring terminal is electrically connected with the first junction of the overvoltage alarm, the fourth relay wiring terminal is electrically connected with the second junction of the overvoltage alarm, the seventh relay wiring terminal is electrically connected with the first junction of the insulating alarm, and the eighth relay wiring terminal is electrically connected with the second junction of the insulating alarm.
The following are further optimizations and/or improvements to the above-described inventive solution:
the wiring terminal board can be electrically connected with the positive bus of the direct current system and the negative bus of the direct current system through the air switch, and the positive bus contact of the wiring terminal board is electrically connected with the positive bus of the direct current system through the air switch and the negative bus contact is electrically connected with the negative bus of the direct current system through the air switch.
The following are further optimizations and/or improvements to the above-described inventive solution:
the wiring terminal board can be electrically connected with an on-site alarm device, the on-site alarm device is an on-site whistle, a first wiring terminal of the on-site whistle is electrically connected with an on-site alarm first contact of the wiring terminal board, and a second wiring terminal of the on-site whistle is electrically connected with an on-site alarm second contact.
The following are further optimizations and/or improvements to the above-described inventive solution:
the wiring terminal board can be electrically connected with a measurement and control device, the measurement and control device comprises an overrun voltage signal first receiving end, an overrun voltage signal second receiving end, an insulation signal first receiving end and an insulation signal second receiving end, the overrun voltage alarm first contact of the wiring terminal board is electrically connected with the overrun voltage signal first receiving end of the measurement and control device, the overrun voltage alarm second contact is electrically connected with the overrun voltage signal second receiving end, the insulation alarm first contact is electrically connected with the insulation signal first receiving end, and the insulation alarm second contact is electrically connected with the insulation signal second receiving end.
The following are further optimizations and/or improvements to the above-described inventive solution:
the measurement and control device can be provided with a signal output device or a signal output end which can transmit signals to the monitoring center.
The invention has reasonable and compact structure and convenient use, can complete the basic functions of the existing direct current insulation detector, realize short-time replacement of the direct current insulation detector, simultaneously send alarm signals to the on-site alarm device and the remote measurement and control device, shorten the power failure time caused by the abnormality of the direct current system, ensure the normal operation of the direct current system of the transformer substation and improve the electricity reliability.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a preferred embodiment of the present invention.
The codes in the drawings are respectively: 1 is a shell, 2 is an insulation detection relay, 3 is an intermediate relay, 4 is a wiring terminal board, 5 is a DC system positive bus, 6 is a DC system negative bus, 7 is a local alarm device, 8 is a measurement and control device, 9 is an air switch, 10 is a monitoring center, G0 is a grounding contact, G1 is a positive bus contact, G2 is a negative bus contact, G3 is an over-voltage alarm first contact, G4 is an over-voltage alarm second contact, G5 is an insulation alarm first contact, G6 is an insulation alarm second contact, G7 is a local alarm first contact, G8 is a local alarm second contact, KM+ is a positive wiring terminal, KM-is a negative wiring terminal, KM0 is a ground terminal, KM11 is an over-under voltage alarm normally open contact, KM12 is an insulation alarm normally open contact, E is an over-under voltage contact first terminal, F is an over-under voltage contact second terminal, X is an insulation contact first terminal, Y is an insulating contact second terminal, A is a relay first negative terminal, B is a relay second negative terminal, C is a relay first positive terminal, D is a relay second positive terminal, KA20 is a relay first coil, KA30 is a relay second coil, KA21 is a relay first normally open contact, KA22 is a relay second normally open contact, KA33 is a relay third normally open contact, KA34 is a relay fourth normally open contact, K1 is a relay first terminal, K2 is a relay second terminal, K3 is a relay third terminal, K4 is a relay fourth terminal, K5 is a relay fifth terminal, K6 is a relay sixth terminal, K7 is a relay seventh terminal, K8 is a relay eighth terminal, M1 is an overrun signal first receiving end, M2 is an overrun signal second receiving end, m3 is the first receiving end of the insulating signal, and M4 is the second receiving end of the insulating signal.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to examples and figures:
as shown in fig. 1 and 2, the insulation detection switching device of the direct current system comprises a shell 1, an insulation detection relay 2, an intermediate relay 3 and a wiring terminal board 4, wherein the insulation detection relay 2, the intermediate relay 3 and the wiring terminal board 4 are fixedly arranged in the shell 1, the front side of the insulation detection relay 2 is positioned at the front end of the shell 1, the wiring terminal board 4 is positioned at the left side end or the right side end or the rear side end of the shell 1, the insulation detection relay 2 comprises a detector wiring terminal and a detector signal terminal, the detector wiring terminal is electrically connected with the wiring terminal board 4, the detector signal terminal is electrically connected with the wiring terminal board 4 through the intermediate relay 3, an access contact capable of being electrically connected with a positive bus 5 of the direct current system, a negative bus 6 of the direct current system and a grounding busbar is arranged on the wiring terminal board 4, and an output contact capable of being electrically connected with a local alarm device 7 and a measurement and control device 8 is arranged on the wiring terminal board 4. The insulation detection relay 2 is an existing public insulation detection relay device, and because only one insulation alarm node and only one overvoltage/undervoltage alarm node of the existing insulation detection relay respectively cannot meet the requirements of remote alarm signal transmission and on-site prompt, two pairs of nodes are expanded through the intermediate relay 3 and respectively connected to the measurement and control device 8 and the on-site alarm device 7 to perform remote alarm and on-site alarm, so that the voltage state and the positive-negative electrode ground insulation state of the direct current bus can be monitored simultaneously. According to the invention, the basic function of the existing direct current insulation detector can be completed through the insulation detection relay 2, when the direct current insulation detector has sudden device faults in the operation process and temporary spare parts are not available, short-time replacement can be realized through the invention, replacement is carried out after the spare parts arrive, the intermediate relay 3 can realize the expansion of an over-voltage and under-voltage alarm signal end and an insulation alarm signal end, and meanwhile, alarm signals are sent to the on-site alarm device 7 and the remote measurement and control device 8, so that the power failure time caused by abnormality of a direct current system can be shortened, the normal operation of the direct current system of a transformer substation is ensured, the electricity reliability is improved, the equipment in the transformer substation is protected, and the whole power grid can normally operate. The invention has the advantages of simple operation, reliable operation, good substitution effect and capability of remarkably saving the power failure cost through practical verification.
The insulation detection switching device of the direct current system can be further optimized or/and improved according to actual needs:
as shown in fig. 1 and 2, the access contact includes a positive bus contact G1, a negative bus contact G2, and a ground contact G0, where the positive bus contact G1 can be electrically connected to a positive bus 5 of the dc system, the negative bus contact G2 can be electrically connected to a negative bus 6 of the dc system, and the ground contact G0 can be electrically connected to a ground bus; the output contacts comprise an overrun voltage alarm first contact G3, an overrun voltage alarm second contact G4, an insulation alarm first contact G5, an insulation alarm second contact G6, an in-situ alarm first contact G7 and an in-situ alarm second contact G8, wherein the overrun voltage alarm first contact G3 and the overrun voltage alarm second contact G4 can be electrically connected with an overrun voltage signal terminal of the measurement and control device 8, the insulation alarm first contact G5 and the insulation alarm second contact G6 can be electrically connected with an insulation signal terminal of the measurement and control device 8, and the in-situ alarm first contact G7 and the in-situ alarm second contact G8 can be electrically connected with the in-situ alarm device 7.
As shown in fig. 1 and 2, the insulation detection relay 2 comprises an overvoltage/undervoltage alarm normally open contact KM11 and an insulation alarm normally open contact KM12, the detector wiring terminal comprises a positive wiring terminal km+ and a negative wiring terminal KM-, a grounding electrode terminal KM0, the detector signal terminal comprises an overvoltage/undervoltage contact first terminal E, an overvoltage/undervoltage contact second terminal F, an insulation contact first terminal X and an insulation contact second terminal Y, the overvoltage/undervoltage alarm normally open contact KM11 can be closed when the bus voltage exceeds a preset overvoltage value or is lower than a preset undervoltage value, the insulation alarm normally open contact KM12 can be closed when the insulation resistance to ground is reduced, the positive wiring terminal km+ is electrically connected with a positive bus contact G1, the negative wiring terminal KM-is electrically connected with a negative bus contact G2, and the grounding electrode terminal KM0 is electrically connected with a grounding contact G0; the relay 3 comprises a first negative terminal A, a second negative terminal B, a first positive terminal C, a second positive terminal D, a first coil KA20, a second coil KA30, a first normally open contact KA21, a second normally open contact KA22, a third normally open contact KA33, a fourth normally open contact KA34, a first connecting terminal K1, a second connecting terminal K2, a third connecting terminal K3, a fourth connecting terminal K4, a fifth connecting terminal K5, a sixth connecting terminal K6, a seventh connecting terminal K7 and an eighth connecting terminal K8, wherein the first connecting terminal K1 and the second connecting terminal K2 are respectively and electrically connected with two ends of the first normally open contact KA21, the second connecting terminal K5 and the sixth connecting terminal K6 are respectively and electrically connected with two ends of the second normally open contact KA22, the relay terminal K3, the fourth connecting terminal K5, the sixth connecting terminal K6 and the relay contact K4 are respectively and electrically connected with the relay contacts K4, the first coil K8, the second connecting terminal K3 and the second coil K33, the first connecting terminal K2 and the second connecting terminal K8 are respectively and electrically connected with the first normally open contact KA 21; the positive electrode wiring terminal KM+ is electrically connected with the first insulating contact terminal X, the first overvoltage-undervoltage contact terminal E, the first relay wiring terminal K1 and the fifth relay wiring terminal K5 respectively, the negative electrode wiring terminal KM-is electrically connected with the first relay negative electrode terminal A, the second relay negative electrode terminal B and the second in-situ alarm contact G8 respectively, the first in-situ alarm contact G7 is electrically connected with the second relay wiring terminal K2 and the sixth relay wiring terminal K6 respectively, the second overvoltage-undervoltage contact terminal F is electrically connected with the first insulating contact terminal C, the second insulating contact terminal Y is electrically connected with the second relay positive electrode terminal D, the third relay wiring terminal K3 is electrically connected with the first overvoltage alarm contact G3, the fourth relay wiring terminal K4 is electrically connected with the second overvoltage alarm contact G4, the seventh relay wiring terminal K7 is electrically connected with the first insulating alarm contact G5, and the eighth relay wiring terminal K8 is electrically connected with the second insulating alarm contact G6. When the bus voltage exceeds a preset overvoltage value or is lower than a preset undervoltage value, an overvoltage and undervoltage alarm normally open contact KM11 is closed, a positive electrode wiring terminal KM+, an overvoltage and undervoltage contact first terminal E, an overvoltage and undervoltage contact second terminal F, a relay first positive electrode terminal C, a relay first negative electrode terminal A and a negative electrode wiring terminal KM-form a closed loop, a local alarm first contact G7, a relay second wiring terminal K2, a relay first wiring terminal K1 and a positive electrode wiring terminal KM+ are electrically connected in sequence, the negative electrode wiring terminal KM-is electrically connected with a local alarm second contact G8, a local alarm device 7 can send out a local alarm signal, and meanwhile, a circuit among the local alarm first contact G3, a relay third wiring terminal K3, a relay fourth wiring terminal K4 and the local alarm second contact G4 is connected, so that an ultra-limit voltage signal can be sent to a measurement and control device 8; when the insulation resistance to ground is reduced, the insulation alarm normally open contact KM12 is closed, the positive electrode wiring terminal KM+, the insulation contact first terminal X, the insulation contact second terminal Y, the relay second positive electrode terminal D, the relay second negative electrode terminal B and the negative electrode wiring terminal KM-form a closed loop, the first on-site alarm contact G7, the relay sixth wiring terminal K6, the relay fifth wiring terminal K5 and the positive electrode wiring terminal KM+ are electrically connected in sequence, the negative electrode wiring terminal KM-is electrically connected with the second on-site alarm contact G8, the on-site alarm device 7 can send an on-site alarm signal, and meanwhile, the circuit among the first on-site alarm contact G5, the seventh wiring terminal K7 of the relay, the eighth wiring terminal K8 of the relay and the second on-site alarm contact G6 is communicated, and the insulation alarm signal can be sent to the measurement and control device 8.
As shown in fig. 1 and 2, the connection terminal board 4 is electrically connected with the positive bus 5 and the negative bus 6 of the direct current system through the air switch 9, the positive bus contact G1 of the connection terminal board 4 is electrically connected with the positive bus 5 of the direct current system through the air switch 9, and the negative bus contact G2 is electrically connected with the negative bus 6 of the direct current system through the air switch 9.
As shown in fig. 1 and 2, the wiring terminal board 4 is electrically connected with an on-site alarm device 7, the on-site alarm device 7 is an on-site whistle, a first wiring terminal of the on-site whistle is electrically connected with an on-site alarm first contact point G7 of the wiring terminal board 4, and a second wiring terminal of the on-site whistle is electrically connected with an on-site alarm second contact point G8. The on-site whistle gives out a sounding prompt to on-site personnel on duty, so that the on-site whistle is convenient to use and easy to maintain and manage.
As shown in fig. 1 and 2, the terminal board 4 is electrically connected with a measurement and control device 8, the measurement and control device 8 includes an overrun voltage signal first receiving end M1, an overrun voltage signal second receiving end M2, an insulation signal first receiving end M3 and an insulation signal second receiving end M4, the overrun voltage alarm first contact G3 of the terminal board 4 is electrically connected with the overrun voltage signal first receiving end M1 of the measurement and control device 8, the overrun voltage alarm second contact G4 is electrically connected with the overrun voltage signal second receiving end M2, the insulation alarm first contact G5 is electrically connected with the insulation signal first receiving end M3, and the insulation alarm second contact G6 is electrically connected with the insulation signal second receiving end M4. In actual use, the loop needs to be checked first to prevent the loop from being short-circuited or grounded, the capacity of the air switch 9 needs to be matched properly to prevent the override trip of the air switch of the upper-level main power supply, and the action voltage of the intermediate relay 3 needs to be tested before use.
As shown in fig. 1 and 2, the measurement and control device 8 is provided with a signal output device or a signal output terminal which can transmit signals to the monitoring center 10. The measurement and control device 8 transmits signals to the remote monitoring center 10, so that centralized management and remote monitoring are conveniently realized.
The technical characteristics form the optimal embodiment of the invention, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (4)
1. The insulation detection switching device for the direct current system is characterized by comprising a shell, an insulation detection relay, an intermediate relay and a wiring terminal board, wherein the insulation detection relay, the intermediate relay and the wiring terminal board are fixedly arranged in the shell, the front side of the insulation detection relay is positioned at the front end of the shell, the wiring terminal board is positioned at the left side end or the right side end or the rear side end of the shell, the insulation detection relay comprises a detector wiring terminal and a detector signal terminal, the detector wiring terminal is electrically connected with the wiring terminal board, the detector signal terminal is electrically connected with the wiring terminal board through the intermediate relay, an access contact capable of being electrically connected with a positive electrode bus of the direct current system, a negative electrode bus of the direct current system and a grounding busbar is arranged on the wiring terminal board, an output contact capable of being electrically connected with a local alarm device and a measurement and control device is arranged on the wiring terminal board, the access contact comprises a positive electrode bus contact, a negative electrode bus contact and a grounding contact, the positive electrode bus contact can be electrically connected with the positive electrode bus of the direct current system, and the negative electrode bus can be electrically connected with the grounding contact; the output contact comprises an overrun voltage alarm first contact, an overrun voltage alarm second contact, an insulation alarm first contact, an insulation alarm second contact, a local alarm first contact and a local alarm second contact, wherein the overrun voltage alarm first contact and the overrun voltage alarm second contact can be electrically connected with an overrun voltage signal terminal of the measurement and control device, the insulation alarm first contact and the insulation alarm second contact can be electrically connected with an insulation signal terminal of the measurement and control device, the local alarm first contact and the local alarm second contact can be electrically connected with the local alarm device, the insulation detection relay comprises an overrun voltage alarm normally open contact and an insulation alarm normally open contact, the detector wiring terminal comprises an anode wiring terminal, a cathode wiring terminal and a grounding terminal, the detector signal terminal comprises an overrun voltage contact first terminal, an overrun voltage contact second terminal, an insulation contact first terminal and an insulation contact second terminal, the overrun voltage alarm normally open contact can be closed when the bus voltage exceeds a preset overvoltage value or is lower than a preset undervoltage value, the insulation normally open contact can be closed when the insulation resistance drops, the anode wiring terminal is connected with the cathode wiring terminal and the grounding terminal, and the grounding terminal is electrically connected with the bus; the relay comprises a first negative electrode terminal of the relay, a second negative electrode terminal of the relay, a first positive electrode terminal of the relay, a second positive electrode terminal of the relay, a first coil of the relay, a second coil of the relay, a first normally open contact of the relay, a second normally open contact of the relay, a third normally open contact of the relay, a fourth normally open contact of the relay, a first connecting terminal of the relay, a second connecting terminal of the relay, a third connecting terminal of the relay, a fourth connecting terminal of the relay, a fifth connecting terminal of the relay, a sixth connecting terminal of the relay, a seventh connecting terminal of the relay, and an eighth connecting terminal of the relay, wherein the first connecting terminal of the relay and the second connecting terminal of the relay are respectively and electrically connected with two ends of the first normally open contact of the relay, the third connecting terminal of the relay, the fourth connecting terminal of the relay are respectively and electrically connected with two ends of the third normally open contact of the relay, and the first coil of the relay, the first normally open contact of the relay, the first coil of the relay, the second normally open contact of the relay, and the first normally open contact of the relay, the first coil of the relay and the second normally open contact of the relay are respectively; the positive electrode wiring terminal is electrically connected with the first insulating contact terminal, the first undervoltage contact terminal, the first relay wiring terminal and the fifth relay wiring terminal respectively, the negative electrode wiring terminal is electrically connected with the first negative electrode terminal of the relay, the second negative electrode terminal of the relay and the second local alarm contact respectively, the first local alarm contact is electrically connected with the second relay wiring terminal and the sixth relay wiring terminal respectively, the second undervoltage contact terminal is electrically connected with the first positive electrode terminal of the relay, the second insulating contact terminal is electrically connected with the second positive electrode terminal of the relay, the third relay wiring terminal is electrically connected with the first junction of the overvoltage alarm, the fourth relay wiring terminal is electrically connected with the second junction of the overvoltage alarm, the seventh relay wiring terminal is electrically connected with the first junction of the insulating alarm, and the eighth relay wiring terminal is electrically connected with the second junction of the insulating alarm.
2. The direct current system insulation detection switching device according to claim 1, wherein the wiring terminal board is electrically connected with a direct current system positive bus and a direct current system negative bus through an air switch, and a positive bus contact of the wiring terminal board is electrically connected with the direct current system positive bus through the air switch and a negative bus contact is electrically connected with the direct current system negative bus through the air switch; or/and the wiring terminal board is electrically connected with an on-site alarm device, the on-site alarm device is an on-site whistle, a first wiring terminal of the on-site whistle is electrically connected with an on-site alarm first contact of the wiring terminal board, and a second wiring terminal of the on-site whistle is electrically connected with an on-site alarm second contact.
3. The insulation detection switching device of a direct current system according to claim 1 or 2, wherein the wiring terminal board is electrically connected with a measurement and control device, the measurement and control device comprises an overrun voltage signal first receiving end, an overrun voltage signal second receiving end, an insulation signal first receiving end and an insulation signal second receiving end, an overrun voltage alarm first contact of the wiring terminal board is electrically connected with the overrun voltage signal first receiving end of the measurement and control device, the overrun voltage alarm second contact is electrically connected with the overrun voltage signal second receiving end, the insulation alarm first contact is electrically connected with the insulation signal first receiving end, and the insulation alarm second contact is electrically connected with the insulation signal second receiving end.
4. A direct current system insulation detection switching device according to claim 3, wherein the measurement and control device is provided with a signal output device or a signal output end capable of transmitting signals to a monitoring center.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710079203.8A CN106940390B (en) | 2017-02-14 | 2017-02-14 | Insulation detection switching device of direct current system |
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|---|---|---|---|
| CN201710079203.8A CN106940390B (en) | 2017-02-14 | 2017-02-14 | Insulation detection switching device of direct current system |
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| CN106940390A CN106940390A (en) | 2017-07-11 |
| CN106940390B true CN106940390B (en) | 2023-08-08 |
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| CN202189122U (en) * | 2011-08-30 | 2012-04-11 | 温州电力建设有限公司 | Protective relaying operation panel tester |
| CN202383217U (en) * | 2011-12-26 | 2012-08-15 | 石家庄供电公司 | Integrated test bench of transformer |
| CN103500906A (en) * | 2013-08-15 | 2014-01-08 | 国网吉林省电力有限公司长春供电公司 | Remote control type power supply changeover device |
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| CN104237645A (en) * | 2014-09-04 | 2014-12-24 | 上海慕安电气有限公司 | Online monitoring system and method for insulation state of substation DC system |
| CN104701821A (en) * | 2015-03-20 | 2015-06-10 | 山东钢铁股份有限公司 | SF6 circuit breaker monitoring system |
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| CN106940390A (en) | 2017-07-11 |
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