CN202260153U - Low voltage distribution two-input one-connect electrical interlock system - Google Patents

Low voltage distribution two-input one-connect electrical interlock system Download PDF

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Publication number
CN202260153U
CN202260153U CN2011203923123U CN201120392312U CN202260153U CN 202260153 U CN202260153 U CN 202260153U CN 2011203923123 U CN2011203923123 U CN 2011203923123U CN 201120392312 U CN201120392312 U CN 201120392312U CN 202260153 U CN202260153 U CN 202260153U
Authority
CN
China
Prior art keywords
cabinet
loop
normally closed
incoming line
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011203923123U
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Chinese (zh)
Inventor
梁双成
陈吉军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUBEI CHANGJIANG ELECTRIC CO Ltd
Original Assignee
HUBEI CHANGJIANG ELECTRIC CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUBEI CHANGJIANG ELECTRIC CO Ltd filed Critical HUBEI CHANGJIANG ELECTRIC CO Ltd
Priority to CN2011203923123U priority Critical patent/CN202260153U/en
Application granted granted Critical
Publication of CN202260153U publication Critical patent/CN202260153U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a low voltage distribution two-input one-connect electrical interlock system which includes two low voltage incoming wire cabinets and a bus connection cabinet. Each incoming wire cabinet includes a breaker and a control circuit, and the bus connection cabinet also includes a breaker and the control circuit. Through canceling an intermediate relay and changing a voltage monitoring sampling signal in a secondary control circuit of the connection cabinet, the low voltage distribution two-input one-connect electrical interlock system uses the direct connection of auxiliary contacts which are assembled on the breakers to realize the electrical interlocking, so the structure is simple, the safety hidden trouble of parallel operation of two transformers in a power network caused by a fault of the intermediate relay can be eliminated, and the reliability is improved.

Description

A kind of low-voltage distribution two inlet wires one mother joins the electrical interlock system
Technical field
The utility model relates to low-voltage distribution inlet wire control technology field; More particularly; Relate in particular to a kind of low-voltage distribution two inlet wires one female electrical interlock system that joins, can be used for the electrical interlock of the circuit breaker, isolating switch etc. of power plant, electric substation, switchyard or similar site.
Background technology
At present; Low-voltage distribution field two inlet wires, the one female schemes that adopt more; Subsequent use each other two low pressure incoming line cabinets and a bus are got in touch with between the cabinet; Be the logical relation that adopts " three close two ", i.e. the circuit breaker of low pressure incoming line cabinet and bus contact cabinet can only allow wherein any two breaker closings in running.Fig. 1,2,3,4 provides in a kind of prior art two inlet wires one female sketch map that joins the electrical interlock system, Fig. 2 be AA11 incoming line cabinet (circuit breaker Q F11), Fig. 3 for AA12 get in touch with cabinet (circuit breaker Q F12) and Fig. 4 be AA13 incoming line cabinet (circuit breaker Q F13) totally 3 circuit breakers interlock each other.In the electrical interlock system of AA12 contact cabinet, an auxiliary relay is installed, control divide-shut brake through relay monitoring breaker upper and lower side voltage signal.Because the relay coil capacity is less, after long-time the use, heating accident occurs easily and interlocking was lost efficacy, cause 3 circuit breakers to close a floodgate simultaneously, cause existing in the electrical network potential safety hazard of two parallel operation of transformers.
The utility model content
The purpose of the utility model is the deficiency to above-mentioned prior art, provides a kind of safe and reliable low-voltage distribution two inlet wires one mother to join the electrical interlock system, eliminates the potential safety hazard of two parallel operation of transformers in the electrical network that brings because of the auxiliary relay fault.
For realizing above-mentioned purpose; Low-voltage distribution two inlet wires one female electrical interlock system that joins that the utility model provided; Comprise two low pressure incoming line cabinets and a bus contact cabinet; Each incoming line cabinet includes circuit breaker and control loop with getting in touch with in the cabinet; Said control loop comprises energy storage motor loop, faulty indication loop, closes a floodgate and indicate loop, separating brake indication loop, making electromagnet loop, shunted exciter tripping loop, undervoltage tripping loop, intelligent controller loop; One group of normally closed auxiliary contact of circuit breaker in one group of normally closed auxiliary contact that the electrical interlock system of said incoming line cabinet comprises circuit breaker in another incoming line cabinet and the contact cabinet, after above-mentioned two groups of normally closed auxiliary contact parallel connections, an end is through the upper end U power line connection mutually in fuse and this incoming line cabinet; The other end connects the control loop in this incoming line cabinet; The electrical interlock system of said contact cabinet comprises one group of normally closed auxiliary contact of circuit breaker in each incoming line cabinet, an end of above-mentioned one group of normally closed auxiliary contact through fuse and the lower end U1 of this contact in cabinet mutually power line connect, another end of organizing normally closed auxiliary contact is through the upper end U power line connection mutually in another fuse and this contact cabinet; The other end parallel connection of above-mentioned two groups of normally closed auxiliary contacts, parallel connection back connect the control loop in this contact cabinet.
The utility model low-voltage distribution two inlet wires one female electrical interlock system that joins is through the auxiliary relay in the cancellation prior art median generatrix contact cabinet electrical interlock system; And voltage monitoring sampled signal in the change contact cabinet secondary control loop; All utilize the direct wiring of auxiliary contact of circuit breaker self assembling to realize electrical interlock; Simple in structure, can eliminate the potential safety hazard of two parallel operation of transformers in the electrical network that brings because of the auxiliary relay fault, improve reliability.
Description of drawings
Fig. 1 is main power circuit electrical structure sketch map;
Fig. 2 is the electrical structure sketch map of AA11 incoming line cabinet;
Fig. 3 is the electrical structure sketch map of AA12 contact cabinet in the prior art;
Fig. 4 is the electrical structure sketch map of AA13 incoming line cabinet;
Fig. 5 is the electrical structure sketch map of AA12 contact cabinet among the utility model embodiment.
Embodiment
Below in conjunction with the embodiment in the accompanying drawing the utility model is done further to specify, but do not constitute any restriction the utility model.
Consult Fig. 1,2,4, shown in 5; The utility model low-voltage distribution two inlet wires one female electrical interlock system that joins; Comprise two low pressure incoming line cabinet AA11, AA13 and a bus contact cabinet AA12; Each incoming line cabinet includes circuit breaker (circuit breaker Q F11, QF13 in AA11, the AA13 incoming line cabinet, the circuit breaker Q F12 in the AA12 contact cabinet) and control loop with getting in touch with in the cabinet.The control loop of each incoming line cabinet and contact cabinet includes energy storage motor loop, faulty indication loop, closes a floodgate and indicate loop, separating brake indication loop, making electromagnet loop, shunted exciter tripping loop, undervoltage tripping loop, intelligent controller loop.
In Fig. 2; The electrical interlock system of incoming line cabinet AA11 comprises one group of normally closed auxiliary contact of circuit breaker Q F12 and one group of normally closed auxiliary contact of circuit breaker Q F13; After above-mentioned two groups of normally closed auxiliary contact parallel connections; One end through the upper end U in fuse and this incoming line cabinet mutually power line connect the control loop in this incoming line cabinet of other end connection.As circuit breaker Q F12, when QF13 closes a floodgate, its normally closed auxiliary contact separately breaks off simultaneously, and the making electromagnet of circuit breaker Q F11 can't be switched on, and circuit breaker Q F11 just can not satisfy the combined floodgate condition, thereby can't close a floodgate.The operating principle of incoming line cabinet AA13 is identical with incoming line cabinet AA11, no longer repeats here.
As shown in Figure 5, the electrical interlock system of the utility model contact cabinet AA12 compares with the electrical interlock system of prior art contact cabinet, has cancelled auxiliary relay, all utilizes the direct wiring of auxiliary contact of circuit breaker self assembling.Concrete wiring is: an end of one group of normally closed auxiliary contact of circuit breaker Q F11 is through the lower end U1 power line connection mutually in fuse and this contact cabinet; One end of one group of normally closed auxiliary contact of circuit breaker Q F13 is got in touch with the upper end U power line connection mutually in cabinet through another fuse and this; The other end of the above-mentioned normally closed auxiliary contact of circuit breaker Q F11 is parallelly connected with the other end of the above-mentioned normally closed auxiliary contact of circuit breaker Q F13, and the parallel connection back connects the control loop in this contact cabinet.As circuit breaker Q F11, when QF13 closes a floodgate, its normally closed auxiliary contact separately breaks off simultaneously, and the making electromagnet among the circuit breaker Q F12 can't be switched on, and circuit breaker Q F12 just can not satisfy the combined floodgate condition, thereby can't close a floodgate.

Claims (1)

1. low-voltage distribution two inlet wires one mother joins the electrical interlock system; Comprise two low pressure incoming line cabinets and a bus contact cabinet; Each incoming line cabinet includes circuit breaker and control loop with getting in touch with in the cabinet; Said control loop comprises energy storage motor loop, faulty indication loop, closes a floodgate and indicate loop, separating brake indication loop, making electromagnet loop, shunted exciter tripping loop, undervoltage tripping loop, intelligent controller loop; The electrical interlock system of said incoming line cabinet comprises one group of normally closed auxiliary contact of circuit breaker in another incoming line cabinet and gets in touch with one group of normally closed auxiliary contact of circuit breaker in the cabinet; After above-mentioned two groups of normally closed auxiliary contact parallel connections; One end through the upper end U in fuse and this incoming line cabinet mutually power line connect, the control loop in this incoming line cabinet of other end connection, it is characterized in that: the electrical interlock system of said contact cabinet comprises one group of normally closed auxiliary contact of circuit breaker in each incoming line cabinet; One end of above-mentioned one group of normally closed auxiliary contact is got in touch with the lower end U1 power line connection mutually in cabinet through fuse and this; Another end of organizing normally closed auxiliary contact through the upper end U in another fuse and this contact cabinet mutually power line connect, the other end parallel connection of above-mentioned two groups of normally closed auxiliary contacts, this gets in touch with the control loop in cabinet the connection of parallel connection back.
CN2011203923123U 2011-10-14 2011-10-14 Low voltage distribution two-input one-connect electrical interlock system Expired - Lifetime CN202260153U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203923123U CN202260153U (en) 2011-10-14 2011-10-14 Low voltage distribution two-input one-connect electrical interlock system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203923123U CN202260153U (en) 2011-10-14 2011-10-14 Low voltage distribution two-input one-connect electrical interlock system

Publications (1)

Publication Number Publication Date
CN202260153U true CN202260153U (en) 2012-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203923123U Expired - Lifetime CN202260153U (en) 2011-10-14 2011-10-14 Low voltage distribution two-input one-connect electrical interlock system

Country Status (1)

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CN (1) CN202260153U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN104333126A (en) * 2014-10-27 2015-02-04 国家电网公司 Large hydropower engineering power supply system
CN104753169A (en) * 2015-02-06 2015-07-01 中冶华天南京电气工程技术有限公司 Breaker interlocking and interchanging circuit of dual power supply inlet wire power supply and distribution 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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN104333126A (en) * 2014-10-27 2015-02-04 国家电网公司 Large hydropower engineering power supply system
CN104753169A (en) * 2015-02-06 2015-07-01 中冶华天南京电气工程技术有限公司 Breaker interlocking and interchanging circuit of dual power supply inlet wire power supply and distribution 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

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Granted publication date: 20120530