The control loop abandons the rectifier bridge and adds the spring-loaded relay to the energy storage node

Master Electrician
11/04/2024

The control loop abandons the rectifier bridge and adds the spring-loaded relay to the energy storage node

屏幕截图 2024-11-05 105741.jpg

Master Electrician

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What should be noted when using indoor vacuum circuit breakers?
What should be noted when using indoor vacuum circuit breakers?
I. Overvoltage PreventionVacuum circuit breakers excel in interrupting performance, but high overvoltage may occur across inductors during the switching of inductive loads due to abrupt changes in loop current, which requires special attention. When switching small-capacity motors, starting currents are large, so measures like step-down starting should be adopted to limit the current.Transformers with different structures show distinct characteristics: oil-immersed transformers have high impulse
Echo
06/10/2025
The application of indoor high-voltage vacuum circuit breakers
The application of indoor high-voltage vacuum circuit breakers
In the first half of 2007, as project participants from the Electromechanical Equipment Company of Huaibei Mining Group, we carried out a technical transformation of the 10kV substation in the East Factory Area. Our primary task was to replace the original 10kV disconnector - oil - immersed circuit breaker units with ZN20 indoor high - voltage vacuum circuit breakers.Previously, the SN10 - 10 oil - immersed circuit breakers had been in operation for an extended period, leading to severe oil leak
Echo
06/09/2025
What are the common faults and corresponding solutions for indoor drawer-type high-voltage vacuum circuit breakers?
What are the common faults and corresponding solutions for indoor drawer-type high-voltage vacuum circuit breakers?
Inability to Push In or Withdraw the Draw-out CarriageThe main manifestation is difficulty in inserting the carriage, which may cause equipment damage and threaten production when severe. The causes and countermeasures are shown in Table 1.The circuit - breaker fails to close. It manifests as the closing core actuating but the circuit - breaker not closing successfully; or the closing core not actuating, which shows that the control circuit of the circuit - breaker is open - circuited or the mec
Felix Spark
06/09/2025
What are the common faults and handling methods of the operating mechanisms of 35kV and 10kV indoor vacuum circuit breakers?
What are the common faults and handling methods of the operating mechanisms of 35kV and 10kV indoor vacuum circuit breakers?
In power system operation and maintenance, we have found that 35kV and 10kV indoor vacuum circuit breakers, as core primary equipment of high-voltage switchgear, are widely used in main grid and user substations due to their high reliability and low maintenance workload. From daily inspections and live detection to routine maintenance, vacuum circuit breakers always remain our key focus, as their operational quality is directly related to the stability and reliability of the power system. This p
Felix Spark
06/09/2025
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