When the knife is closed, what is the reason for ignition when pulling?

This is normal. Due to the existence of inductive electrical appliances in the line, and because the gap between the contacts is gradually reduced or increased when the knife switch is closed or connected, when the spacing is very small or seems to be connected, the voltage will break through the air to produce a discharge spark, and at the same time, in the state of the non-connection, the contact area of the contact is very small, and the passing current will produce high heat at these points, which will further enter the air in the gap to be heated by high temperature and conduct. This results in an arc light.

Therefore, the knife switch is only suitable for small power. High power requires a switch with an arc extinguishing device to open and close the circuit.

There is a spark means that your circuit ZD is connected to a load, when the switch is turned on, there is a current in the circuit through the formation of a loop Zero or live wire sparks are related to the order of contact when you close The switch that finally turns on the closed working circuit will definitely produce a spark And the larger the working current in the circuit, the greater the spark If we connect a single pole switch on the live wire and neutral wire respectively, when you turn on the live wire switch first, and then turn on the neutral switch, a spark will be generated on the neutral switch The zero wire will produce a spark on the live wire switch.

Closing with load will ignite, that is, arc pulling, the elimination method is not to bring the load when closing, and then change to a better air switch, these switches are equipped with arc extinguishing devices, will not ignition. This phenomenon will definitely occur when the transformer is directly pulled when the high-voltage side is live, because the transformer itself is also equivalent to a load, so the high-voltage outlet cabinet should be operated as much as possible, and the knife switch should be operated after the high-voltage power is disconnected.

In the process of closing, it is normal for the contact to produce sparks instantly; When the door is opened, the contact will also generate a spark at the moment of separation. That is to say, there is a load at one end of the charge, whether it is turned on or separated, it will produce sparks.

a. Disconnect the air switch and isolation switch of each branch of low pressure. b. Disconnect the low-voltage main switch. The order of power transmission is reversed from power failure.

3. Reverse operation procedures 1. Users of high-voltage dual power supply must contact the power supply bureau in advance for reverse operation, and after obtaining consent or pulling the notice of the power supply bureau, they shall carry out the operation at the specified time, and shall not reverse the gate at will without permission. 2. The reverse operation must first send the idle road, and then stop the original road, so as not to affect the user.

When the switch is closed and the gate is pulled, it will be ignited, which is generally the utility device on this power supply circuit that is using electricity. That is, the circuit pushes the brake under load.

You can check what appliances are plugged into the circuit, and you can unplug the appliances on it and there should be no such problems.

At the same time, the circuit is aging or the circuit is damp, and there may also be ignition.

When the knife switch is closed, the ignition when pulling indicates that there is a short circuit in your circuit, and you need to overhaul and eliminate the fault in the circuit before you can continue to close the switch.

In general, this is caused by the collision of zero live wires in the circuit.

Is it because there is a load closing brake? Generally, only when there is a load, the closing and pulling will start the arc, and the transformer closes the high-voltage fuse is the same, one is that the speed is fast, and the other is that the low-voltage switch at the bottom needs to be fully opened, and it cannot be loaded, so it will generally not ignite the arc!

Answer: When the knife is closed, the first is to ignite when pulling: because the load exceeds the on-off capacity. Second, the knife switch does not have an orphan elimination cover, and it cannot be pulled with load.

At the moment of closing, because the action is not fast enough, the contact point is from small to large, then the contact resistance is also from large to small, and the instantaneous resistance of contact is large, according to q=i*i*r, the electric shock will heat up, and a large amount of heat will produce sparks.

Therefore, when the current is small, the heat is small, and although there is heat, it is small, and there will be no sparks.

When the current is high, when the power of the electrical appliance is high, it is easy to spark.

When you, it means that you don't pull fast enough, and when you, when you close the gate, you won't fire.

Under normal circumstances, in this case, the wiring should be relatively virtual, and some places may be places with leakage, and there are problems with the lines.

The ignition of the switch after a while can be caused by a variety of reasons, the following are some possible situations and corresponding solutions:

1.Poor electrical contact: Check whether the terminal blocks of the knife switch are tightened and make sure that the contact is good. If there is loosening or oxidation, the wiring can be retightened or cleaned.

Overloads can cause currents to exceed the rated capacity of the switch, while short circuits can cause abnormal current increases. In this case, it is necessary to find out the cause of the overload or short circuit and take appropriate measures to solve it, such as reducing the load or eliminating the short circuit fault.

3.Knife switch quality problems: If there is a quality problem with the knife switch itself, it may lead to abnormal operation. In this case, it is advisable to replace the knife switch with a reliable and safety-compliant switch.

4.Environmental factors: The proper functioning of electrical equipment is often dependent on suitable environmental conditions.

Check whether there are any abnormal environmental factors such as temperature permeability, wax, humidity or dust that will affect the normal operation of the knife switch. The environment around the switch needs to be kept dry, clean, and protected from extreme temperatures.

5.Professional maintenance: If the above methods cannot solve the problem, it is recommended to consult a power equipment maintenance professional for further diagnosis and repair.

They can identify the root cause of the problem by checking the circuit slipper, measuring parameters such as voltage, impedance, etc., and take appropriate measures to resolve it.

1.The speed should be fast and crisp to prevent arc ablation of the gate knife.

2.It must be pulled into place, not touched.