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2019-11-18
Ren Yi Electric Encyclopedia: Causes of frequent contactors closing and disconnecting
- Time:2020-07-09 16:03
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(Summary description)Regarding the reason why the contactor is frequently closed and disconnected, the line may be longer, the impulse current is too large when starting at full load, the short circuit between phases causes the current to be too large, the power line is small, and the voltage drop of the power supply is large, and the load is too large. Wait.
Ren Yi Electric Encyclopedia: Causes of frequent contactors closing and disconnecting
(Summary description)Regarding the reason why the contactor is frequently closed and disconnected, the line may be longer, the impulse current is too large when starting at full load, the short circuit between phases causes the current to be too large, the power line is small, and the voltage drop of the power supply is large, and the load is too large. Wait.
- Categories:Industry News
- Author:Ren Yi
- Origin:http://www.scrydq.com
- Time of issue:2020-07-09 16:03
- Views:
Information
Ren Yi official website updated on July 9
Regarding the reason why the contactor is frequently closed and disconnected, the line may be longer, the impulse current is too large when starting at full load, the short circuit between phases causes the current to be too large, the power line is small, and the voltage drop of the power supply is large, and the load is too large. Wait.
Causes of frequent contactor closing and disconnection
Reason: The line may be longer, the impulse current is too large when starting at full load, and the line voltage drop is also large. Just increase the wire section.
The short circuit between phases causes the current to be too large, and the power line is small, which causes the voltage drop of the power supply to be large. When the contactor acts like a contactor, the cross-sectional area of the wire is small, so the resistance value is large. The contactor is closed.
If the load is too large, the starting voltage will drop too much, and the coil will keep insufficient voltage and trip. After the trip, the voltage is restored and it is closed again. Repeat this.
Solution: Change the starting mode of the load, or reduce the load at high speed.
Sichuan Renyi Electric Co., Ltd. is registered under the name of Ren Yi, a senior technician for substation maintenance, and uses scientific research, knowledge innovation, publicity, promotion, and teaching that the temperature of electrical contacts (connectors) is lower than the temperature of its conductors (wires). The theory and technology of "thermal electrical contacts" produces and sells registered trademark electrical equipment that does not heat electrical contacts (joints), as a whole with patented products.
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