What should I do if the air switch trips?
The problem analysis of the air switch tripping
The power supply system automatically The voltage loss release of the air switch is an electromagnet, the armature will be released under the drive of the spring at the moment of power loss, and then the tripping mechanism will be driven to act, and the air switch will complete the tripping operation. When there is lightning in the high-voltage power distribution system, if the voltage-loss release can delay for a few seconds before starting, the power supply system can maintain normal power supply after the high-voltage system voltage instantly returns to normal, thereby significantly reducing the impact of lightning on the production of light hydrocarbon units. Impact. In order to prevent the release of the armature of the voltage-loss release in the high-voltage system, the following three technical solutions are proposed after analysis:
① Bind the armature of the electromagnetic voltage-loss release to prevent it from releasing, so that It can achieve the purpose that the air switch will not trip during lightning, but when the system is permanently powered off, the air switch will not be able to act, losing the meaning of existence, so it is not advisable;
②Using the UPS system to depress After repeated tests, the method of supplying power to the release is not advisable due to the complicated wiring of the equipment, poor reliability, and inability to stably realize the delayed start; An energy storage capacitor is connected in parallel with the coil. When the system voltage is too low, the capacitor automatically releases electric energy to the coil of the voltage loss release to maintain the pull-in state for a certain period of time. After the discharge of the energy storage capacitor is completed, the voltage loss release When the button loses power, the air switch automatically completes the delayed take-off operation. Its transformation method is similar to the AC start and DC silent operation of the AC contactor, the wiring method is simple, and the reliability is high after the test, so it is adopted.
What should I do if the air switch trips?
First, determine whether the tripped air switch is the main switch in the home distribution box or the branch outlet switch. If the main switch does not trip, but only the shunt switch trips, it means that there is a problem with the wiring of the power supply line of the high-power electrical appliance, that is, multiple high-power electrical appliances are connected to the same shunt switch. In this case, adjust the high-power electrical appliance circuit to a light load (It is recommended to use a separate shunt switch for high-power electrical appliances); if the shunt switch does not trip and the main switch trips, calculate whether the sum of the power of the household appliances exceeds the approved power supply capacity (you can call 95598 and pass the customer number. Check the approved power supply capacity), and check whether the total switching capacity matches the approved power supply capacity. If the sum of the power of the household appliances exceeds the approved power supply capacity, reduce the number of household appliances (especially high-power household appliances) used at the same time, and apply to the power supply company for an increase in the power consumption; if the sum of the power of the household appliances does not exceed the approved power supply capacity, However, if the total switch capacity is less than the approved power supply capacity, the main switch that matches the approved power supply capacity needs to be replaced. At the same time, it should be reminded that the starting current of some high-power electrical appliances is relatively large, and the influence of the starting current should be considered when calculating the power.
