CN201413939Y - Electrical interlocking system of inlet wire and interconnection switch for switch apparatus - Google Patents
Electrical interlocking system of inlet wire and interconnection switch for switch apparatus Download PDFInfo
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- CN201413939Y CN201413939Y CN2009201318567U CN200920131856U CN201413939Y CN 201413939 Y CN201413939 Y CN 201413939Y CN 2009201318567 U CN2009201318567 U CN 2009201318567U CN 200920131856 U CN200920131856 U CN 200920131856U CN 201413939 Y CN201413939 Y CN 201413939Y
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Abstract
An electrical interlocking system of inlet wire and interconnection switch for switch apparatus belongs to the technical field of electricity, and comprises a plurality of inlet wire switch apparatuses and at least an interconnection switch device, wherein a main switch and a control circuit are arranged in each inlet wire switch apparatus and each interconnection switch device. The electrical interlocking system changes the mode of using a normally closed contact to interlock between each original cabinets, cancels the mutual connecting lines between each switch, directly uses a relay to monitor the electricity condition of an upper and a lower loop buses of the circuit breaker of the cabinet and judge whether to close or not. The electrical interlocking system has simple structure, excellent versatility, safety and reliability.
Description
Technical field
The utility model relates to a kind of switchgear electrical system, refers to a kind of switchgear inlet wire, interconnection switch electrical interlock system especially, belongs to technical field of electricity.The electrical interlock that can be used for the circuit breaker, isolating switch etc. of power plant, electric substation, switchyard or similar site.
Background technology
Along with the raising of national life level, the increasing of power consumption equipment, power load constantly increases, and the reliability and the fail safe of electricity consumption are had higher requirement.The mode of single transformer power supply in the past can not satisfy the demands, generally having now two or above transformer powers, ordinary circumstance all requires fanout operation, for prevent unexpected side by side, can between the low-pressure side service entrance switch of each transformer and bus connection switch, interlocking be set.This interlock system comprises a plurality of service entrance switch equipment and at least one interconnection switch equipment, the inlet wire of service entrance switch equipment, the interlocking between the bus connection switch generally all are the normally closed auxiliary contacts that is connected in series related circuit breaker between service entrance switch equipment, interconnection switch facility switching mutually.Include main switch (circuit breaker or isolating switch) in each service entrance switch equipment, and control circuit; The service entrance switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, the decompression wire loop; The contact cabinet includes fuse, tank circuit, closing circuit, trip(ping) circuit, decompression coil and power supply detect the loop, wherein the closing circuit of each cabinet, trip(ping) circuit can respond the combined floodgate of main switch and trip operation and closed or disconnect, concrete connected mode is well-known to those skilled in the art, no longer describes in detail.Fig. 1,2,3,4 provides 2 transformer inlet wires of a prior art, interconnection switch electrical interlock system schematic, Fig. 2 be 1# service entrance switch equipment (main switch 1ZK), Fig. 3 for 2# service entrance switch equipment (main switch 2ZK) and Fig. 4 interconnection switch equipment (main switch 3ZK) totally 3 needs interlock each other.For guaranteeing that 2 transformers can not paired running, 1ZK, 2ZK, 3ZK3 platform main switch can only be wherein 2 close a floodgate simultaneously, 1 is in gate-dividing state in addition.Need the normally closed auxiliary contact of other 2 switches is caused the parallel connection of this switch closing circuit for satisfying every switch of this interlock requirement.As shown in Figure 2, need cause closing circuit to 2ZK and the normally closed auxiliary contact of 3ZK, i.e. " 2ZK ", " 3ZK " in the frame of broken lines such as: 1# service entrance switch equipment main switch 1ZK control loop; 2# service entrance switch equipment, interconnection switch equipment are like this equally.
There is following shortcoming in this interlocking method: 1, since the low-side switch (being the low-voltage cabinet service entrance switch) of transformer with among bus connection switch generally all can be installed in different switchgears, mutually certain distance is arranged, line is very inconvenient and connect mistake easily, also be vulnerable to extraneous destruction in the running, the security reliability of interlocking can't guarantee; 2, owing to need line mutually, before transformer puts into operation, certainly will take the time of unit in charge of construction, influence project progress; 3, under the situation of many transformers (3 or more than) power supply, because logical relation, the interlocking between is loaded down with trivial details unusually mutually, has all brought certain difficulty for design and construction; 4, the method versatility is not strong, and is all different for the system of different number transformers, the interlocking signal of low-side switch of different transformers in the same system, needs design separately.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, versatility good, safe and reliable switchgear inlet wire, interconnection switch electrical interlock system.
The technical scheme that its technical problem that solves the utility model adopts is: change the mode with the normally closed contact interlocking between original each cabinet, cancel the line of each switch between mutually, directly by relay to this cabinet breaker up and down the charged situation of primary circuit bus monitor to conclude whether can close a floodgate.
The utility model includes a plurality of service entrance switch equipment and at least one interconnection switch equipment, includes main switch (circuit breaker or isolating switch) in each service entrance switch equipment and the interconnection switch equipment, and control circuit; The service entrance switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, the decompression wire loop; The interconnection switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, decompression coil and power supply detect the loop, the closing circuit of each switchgear wherein, trip(ping) circuit can respond the combined floodgate of master switch and trip operation and closed or disconnect, it is characterized in that: also include a power supply in each service entrance switch equipment and detect the loop, this power supply detects one group of normally closed auxiliary contact that the loop comprises an auxiliary relay and main switch, the normally closed auxiliary contact series connection of auxiliary relay coil and main switch, the two ends of this series circuit connect the two-phase power line of the power line leading-out terminal of main switch respectively by fuse, and one group of normally-closed contact of this auxiliary relay is connected with the decompression coil of this switchgear decompression wire loop; Include first auxiliary relay and second auxiliary relay in the interconnection switch equipment, one group of normally-closed contact of first auxiliary relay and one group of normally-closed contact parallel connection of second auxiliary relay, the switches set after this parallel connection is connected with the closing coil in this switchgear closing circuit; The interconnection switch equipment decompression coil and the second auxiliary relay coils from parallel connection of coils, the two ends of this two bridging coil are connected with two groups of normally opened contacts of first auxiliary relay and an end of two groups of normally-closed contacts respectively, the other end of the above-mentioned normally opened contact of first auxiliary relay and the first auxiliary relay coils from parallel connection of coils, this parallel circuits is connected by the two-phase power line of the main switch leading-out terminal in fuse and the controlled service entrance switch equipment, and the other end of above-mentioned two groups of normally-closed contacts of first auxiliary relay is connected by the two-phase power line of the main switch end of incoming cables in fuse and the controlled service entrance switch equipment respectively.
The beneficial effects of the utility model are: simple in structure, versatility good, safe and reliable.1, because relay is directly installed, improved the reliability and the fail safe of control system in self cabinet.2,, shortened time of unit in charge of construction and the switchgear debug time that dispatches from the factory greatly because each switch does not need line between mutually.3, because relay circuit has been installed when having dispatched from the factory in complete factory, and unnecessary field connection has been avoided on-the-spot wrong line or has been missed the problem of line.4, method highly versatile for different transformer-supplied modes, all can use, and unnecessary design separately again.
Description of drawings
The utility model will be further described below in conjunction with accompanying drawing.
Fig. 1 is main power circuit electrical structure schematic diagram.
Fig. 2 is the 1# service entrance switch equipment electrical structure schematic diagram of prior art.
Fig. 3 is the 2# service entrance switch equipment electrical structure schematic diagram of prior art.
Fig. 4 is the interconnection switch equipment electrical structure schematic diagram of prior art.
Fig. 5 is the electrical structure schematic diagram of 1# service entrance switch equipment among the utility model embodiment.
Fig. 6 is the electrical structure schematic diagram of 2# service entrance switch equipment among the utility model embodiment.
Fig. 7 is the electrical structure schematic diagram of interconnection switch equipment among the utility model embodiment.
Symbol among the figure and standard symbol and sign English, that Digital ID is electric specialty do not describe in detail.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
Referring to accompanying drawing 1,5,6,7, be switchgear inlet wire, the interconnection switch electrical interlock system schematic of two transformers in the utility model non-limiting examples, comprise a plurality of (2) service entrance switch equipment (1# service entrance switch equipment, 2# service entrance switch equipment) and at least one interconnection switch equipment, include main switch (1ZK in the 1# service entrance switch equipment, the 3ZK in the interconnection switch equipment) and control circuit in each service entrance switch equipment (for example 1# service entrance switch equipment) and the interconnection switch equipment; The service entrance switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, the decompression wire loop; The interconnection switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, decompression coil and power supply detect the loop, the closing circuit of each switchgear wherein, trip(ping) circuit can respond main switch (1ZK, 2ZK or 3ZK) combined floodgate and trip operation and closed or disconnect, it is characterized in that: each service entrance switch equipment (1# service entrance switch equipment, 2# service entrance switch equipment) also include a power supply in and detect the loop, this power supply detects one group of normally closed auxiliary contact that loop comprises an auxiliary relay and main switch (in the 1# service entrance switch equipment in 1OF or the 2# service entrance switch equipment 2OF), normally closed auxiliary contact (1OF or the 2OF) series connection of auxiliary relay coil (1KA or 2KA) and main switch, the two ends of this series circuit meet the two-phase power line (3L1 of the power line leading-out terminal of main switch respectively by fuse, 3L3), one of this auxiliary relay group of normally-closed contact (1KA-1 or 2KA-1) is connected with the decompression coil (1MN or 2MN) of this cabinet decompression wire loop; Also include first auxiliary relay and second auxiliary relay in the contact cabinet, one group of normally-closed contact (3KA2-20) parallel connection of the one group of normally-closed contact (3KA1-10) of first auxiliary relay and second auxiliary relay, the switches set after this parallel connection is connected with the closing coil (3XF) in this cabinet closing circuit; Contact cabinet decompression coil (3MN) is in parallel with the second auxiliary relay coil (3KA2), the two ends of this two bridging coil respectively with two groups of normally opened contact (3KA1-21 of first auxiliary relay, 3KA1-22) with two groups of normally-closed contact (3KA1-11, end 3KA1-12) connects, above-mentioned normally opened contact (the 3KA1-21 of first auxiliary relay, other end 3KA1-22) is in parallel with the first auxiliary relay coil (3KA1), this parallel circuits is connected by the two-phase power line of the main switch leading-out terminal in fuse and the controlled incoming line cabinet, above-mentioned normally-closed contact (the 3KA1-11 of first auxiliary relay, other end 3KA1-12) is by the two-phase power line (3L1 of the main switch end of incoming cables in fuse and the controlled incoming line cabinet, 3L3) connect the above-mentioned normally opened contact (3KA1-21 of first auxiliary relay, other end 3KA1-22) is by the two-phase power line (4L1 of the main switch leading-out terminal in fuse and the controlled incoming line cabinet, 4L3) connect.
1# service entrance switch equipment is installed auxiliary relay 1KA at main switch 1ZK leading-out terminal, is whether be used for detecting main switch 1ZK leading-out terminal primary circuit bus 3L1,3L3 charged.If primary circuit bus 3L1,3L3 is charged then 1KA gets electronic work, the normally closed auxiliary contact 1KA-1 of 1KA disconnects, thereby makes the under-voltage coil 1MN of main switch 1ZK dead electricity guarantee that main switch 1ZK can not close a floodgate; If primary circuit bus 3L1,3L3 are not charged, then main switch 1ZK can realize closing a floodgate by switch knob 1HA.2# incoming line cabinet operating principle is identical with the 1# incoming line cabinet.
The contact cabinet is installed auxiliary relay 3KA1 and 3KA2 at main switch 3ZK respectively into and out of line end, and whether be used for detecting main switch 3ZK charged into and out of line end primary circuit bus 3L1,3L3 and 4L1,4L3.If into and out of line end all charged then 3KA1,3KA2 all electronic work, 3KA1,3KA2 normally closed contact 3KA1-11,3KA2-12 disconnect, and main switch 3ZK closing circuit is disconnected guarantee that main switch 3ZK can not close a floodgate; If main switch 3ZK has only an end charged into and out of line end, then main switch 3ZK decompression coil 3MN gets electricly, and closing circuit can realize close a floodgate by switch knob 3HA; If all not charged into and out of line end, then main switch 3ZK decompression coil losing electricity main switch 3ZK can not close a floodgate.
Claims (1)
1, a kind of switchgear inlet wire, interconnection switch electrical interlock system include a plurality of service entrance switch equipment and at least one interconnection switch equipment, include main switch and control circuit in each service entrance switch equipment and the interconnection switch equipment; The service entrance switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, the decompression wire loop; The interconnection switch equipment control circuit includes fuse, tank circuit, closing circuit, trip(ping) circuit, decompression coil and power supply detect the loop, the closing circuit of each switchgear wherein, trip(ping) circuit can respond the combined floodgate of master switch and trip operation and closed or disconnect, it is characterized in that: also include a power supply in each service entrance switch equipment and detect the loop, this power supply detects one group of normally closed auxiliary contact that the loop comprises an auxiliary relay and main switch, the normally closed auxiliary contact series connection of auxiliary relay coil and main switch, the two ends of this series circuit connect the two-phase power line of the power line leading-out terminal of main switch respectively by fuse, and one group of normally-closed contact of this auxiliary relay is connected with the decompression coil of this switchgear decompression wire loop; Include first auxiliary relay and second auxiliary relay in the interconnection switch equipment, one group of normally-closed contact of first auxiliary relay and one group of normally-closed contact parallel connection of second auxiliary relay, the switches set after this parallel connection is connected with the closing coil in this switchgear closing circuit; The interconnection switch equipment decompression coil and the second auxiliary relay coils from parallel connection of coils, the two ends of this two bridging coil are connected with two groups of normally opened contacts of first auxiliary relay and an end of two groups of normally-closed contacts respectively, the other end of the above-mentioned normally opened contact of first auxiliary relay and the first auxiliary relay coils from parallel connection of coils, this parallel circuits is connected by the two-phase power line of the main switch leading-out terminal in fuse and the controlled service entrance switch equipment, and the other end of above-mentioned two groups of normally-closed contacts of first auxiliary relay is connected by the two-phase power line of the main switch end of incoming cables in fuse and the controlled service entrance switch equipment respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201318567U CN201413939Y (en) | 2009-05-18 | 2009-05-18 | Electrical interlocking system of inlet wire and interconnection switch for switch apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201318567U CN201413939Y (en) | 2009-05-18 | 2009-05-18 | Electrical interlocking system of inlet wire and interconnection switch for switch apparatus |
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| Publication Number | Publication Date |
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| CN201413939Y true CN201413939Y (en) | 2010-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201318567U Expired - Fee Related CN201413939Y (en) | 2009-05-18 | 2009-05-18 | Electrical interlocking system of inlet wire and interconnection switch for switch apparatus |
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| CN (1) | CN201413939Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005776A (en) * | 2010-10-29 | 2011-04-06 | 中国原子能科学研究院 | Electric interlocking circuit and implementation method thereof |
| CN102637222A (en) * | 2012-03-13 | 2012-08-15 | 中国海洋石油总公司 | Method for simulating interconnection of turbine unit and grid system |
| CN102842956A (en) * | 2012-09-28 | 2012-12-26 | 山东电力集团公司枣庄供电公司 | Loop security automatic controlling system capable of resisting 30-degree angle error |
| CN102891440A (en) * | 2012-08-15 | 2013-01-23 | 徐州新电高科电气有限公司 | Lock-type low-voltage cabinet |
| CN105006881A (en) * | 2015-07-06 | 2015-10-28 | 山东鲁亿通智能电气股份有限公司 | Automatic put and automatic recovery control system |
| CN105490254A (en) * | 2014-09-19 | 2016-04-13 | 无锡阿比利德电力科技有限公司 | Contact cabinet for low-voltage system with two sections of inlet wires |
| CN110095665A (en) * | 2018-01-31 | 2019-08-06 | 上海二十冶建设有限公司 | Pass through the test method in the electrical system circuit that the bus that interconnection switch connects is constituted |
| CN108447713B (en) * | 2018-05-18 | 2023-09-29 | 浙江临高电气实业有限公司 | Lock of mechanical interlocking device, mechanical interlocking device and power supply system |
-
2009
- 2009-05-18 CN CN2009201318567U patent/CN201413939Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005776A (en) * | 2010-10-29 | 2011-04-06 | 中国原子能科学研究院 | Electric interlocking circuit and implementation method thereof |
| CN102637222A (en) * | 2012-03-13 | 2012-08-15 | 中国海洋石油总公司 | Method for simulating interconnection of turbine unit and grid system |
| CN102891440A (en) * | 2012-08-15 | 2013-01-23 | 徐州新电高科电气有限公司 | Lock-type low-voltage cabinet |
| CN102842956A (en) * | 2012-09-28 | 2012-12-26 | 山东电力集团公司枣庄供电公司 | Loop security automatic controlling system capable of resisting 30-degree angle error |
| CN105490254A (en) * | 2014-09-19 | 2016-04-13 | 无锡阿比利德电力科技有限公司 | Contact cabinet for low-voltage system with two sections of inlet wires |
| CN105006881A (en) * | 2015-07-06 | 2015-10-28 | 山东鲁亿通智能电气股份有限公司 | Automatic put and automatic recovery control system |
| CN105006881B (en) * | 2015-07-06 | 2018-11-09 | 山东鲁亿通智能电气股份有限公司 | One kind hauling oneself willingly into runback control system |
| CN110095665A (en) * | 2018-01-31 | 2019-08-06 | 上海二十冶建设有限公司 | Pass through the test method in the electrical system circuit that the bus that interconnection switch connects is constituted |
| CN110095665B (en) * | 2018-01-31 | 2021-10-01 | 上海二十冶建设有限公司 | Method for testing an electrical system circuit formed by busbars connected by tie switches |
| CN108447713B (en) * | 2018-05-18 | 2023-09-29 | 浙江临高电气实业有限公司 | Lock of mechanical interlocking device, mechanical interlocking device and power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20120518 |