When we use the voltage stabilizer, some users, in order to protect the safety of the circuit, when using the voltage stabilizer, add a leakage protection switch to the input end of the voltage stabilizer. When the voltage stabilizer is started, the leakage protector will directly trip and use the stabilizer. The voltage stabilizer cannot work, so when we install the voltage stabilizer, we only need to connect the input line directly to the input end of the voltage stabilizer, and there is no need to add a leakage protection switch.
Why can't the voltage stabilizer input terminal be equipped with leakage protection switch?
The principle of the leakage protector is that the neutral current is zero. When using a voltage regulator, the current in the neutral line cannot be zero.
There are isolation transformers and voltage regulating transformers inside the voltage stabilizer. The transformer is equivalent to a capacitive effect when starting up. When the voltage regulator is turned on, the instantaneous charging of the transformer and the voltage regulator causes the neutral line to carry current, forming a current loop. If a leakage protector is used at the incoming line, it will act and cut off the input power, causing the voltage stabilizer to be out of power and unable to be used.
Therefore, customers please do not use a leakage protector at the input of the voltage stabilizer. If the customer insists on using it, please use a leakage protector at the output of the voltage stabilizer. To ensure the safe use of the voltage stabilizer, the voltage stabilizer must be connected to the earth.