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Loop and method for converting operating state of alternating current contactor by contact switch contact

A technology of AC contactor and contact switch, applied in the direction of circuits, relays, electrical components, etc., can solve problems such as tripping, interference, and affecting system stability, and achieve economical operation, significance, and power supply continuity. Effect

Inactive Publication Date: 2017-05-31
STATE GRID SHANDONG ELECTRIC POWER CO QINGZHOU POWER SUPPLY CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the user's contact switch breaks the contactor coil, it will generate arc and overvoltage, which will seriously affect the life of the contactor coil, and will also generate strong interference, which will affect the stability of the system
In severe cases, it will cause the contactor to act and trip, which greatly affects the continuity of power supply on the customer side and induces complaints from users on electricity service. Through in-depth analysis, fault conversion and anti-overvoltage functions are added to the contactor control circuit. Reliable, stable and economical operation of power grid is of great significance

Method used

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  • Loop and method for converting operating state of alternating current contactor by contact switch contact
  • Loop and method for converting operating state of alternating current contactor by contact switch contact

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , 2 As shown, the circuit for switching the operating state of the AC contactor by using the contact switch contacts includes an AC power supply, the output side of the AC power supply is connected to a power-on button K, and the output terminal of the AC power supply is connected in parallel with a control circuit. and other electronic circuits, the parallel circuit of the control loop and the other electronic circuits and the power-on button K are connected in series at both ends of the AC power supply;

[0024] The absorption and suppression circuit can convert overvoltage and arc into electromagnetic attraction which is beneficial to the smooth conversion process, ensures the stability of each component of the circuit, ensures the continuous operation of the contactor, and ensures that the continuity of production is not affected.

[0025] The control loop includes the first contact switch contact, the fuse 2, the contactor coil KM and the second c...

Embodiment 2

[0033] A method for switching the operating state of an AC contactor by using a contact switch contact, including the following states,

[0034] Running state 1. Press the power-on button K, the first switch contacts the reset contact F1 of the first switch, the second switch contacts the reset contact F2 of the second switch, and AC power is applied to The contactor coil KM is connected to AC start the contactor coil KM.

[0035] Running state 2: After the AC contactor is started, when the fault protection circuit detects that the logic level of key nodes of other electronic circuits is normal, it feeds back to the fault conversion circuit, and the fault conversion circuit drives the contact switch to act and maintains the action contacts D1 and D2. Make the contactor switch to DC low voltage holding state.

[0036] Operation state 3. When the DC power supply of the contactor coil is running, other electronic circuits are faulty, and the coil voltage detection circuit detect...

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Abstract

The invention provides a loop and a method for converting an operating state of an alternating current contactor by a contact switch contact. The loop comprises an AC power supply, wherein the output side of the AC power supply is connected with a power-on button; a control loop and other electronic circuits are arranged at the output end of the AC power supply in parallel; and a parallel circuit of the control loop and other electronic circuits is connected with the power-on button in series at the two ends of the AC power supply. By virtue of the technical scheme, the beneficial effects as follows are achieved: a conversion circuit is formed by matching of a the contact switch and a power electronic element; alternating current and direct current operating ways are switched in time in a module fault condition; fault conversion and overvoltage resistance functions are added in the control loop of the contactor, so that power supply continuity of the contactor is ensured; and the loop and the method are of great significance to the reliable, stead and economical operation of a power distribution network.

Description

technical field [0001] The invention relates to the technical field of operating state control of an AC contactor, in particular to a circuit and a method for switching the operating state of an AC contactor by using a contact switch contact. Background technique [0002] With the increasing load of urban and rural power grids, the number of ring network cabinets and switching stations, user-side special transformers and switchgears continue to increase, and a large number of contactors are put into operation. When the user's contact switch breaks the contactor coil, arcs and overvoltages will be generated, which will seriously affect the life of the contactor coil, and will also generate strong interference, affecting system stability. In severe cases, it will cause the contactor to act and trip, which greatly affects the continuity of power supply on the customer side and induces complaints from users on electricity service. Through in-depth analysis, fault conversion and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00
CPCH01H47/002
Inventor 季爱英高薇赵继城张国林类金刘伟赵海刘国俊闫伟范军英马文晔彭笑陈晖李玉红李红磊查明新王延涛紫萍刘梅王志红王莉
Owner STATE GRID SHANDONG ELECTRIC POWER CO QINGZHOU POWER SUPPLY CO
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