The safety switch is one of the types of electrical protection switches that are used to protect people and equipment in an electrical system. The safety switch, which is offered in several different types (the types will be mentioned in the following), is one of the safest protection switches for detecting and interrupting the current of electric leakage, as well as preventing shock caused by indirect contact with electricity. is.

Types of life-saving keys

Types of life-saving switches based on the type of electricity consumed are as follows:

• Three-phase life-saving switch
• One-phase life-saving switch

The way this switch works is that it interrupts the circuit by comparing the difference between the forward current and the return current if there is a difference between the forward current and the return current. In simpler words, this switch measures the input current to the device and the output current from it. Normally, the value of the forward current is equal to the return current. But if there is a difference, this current difference can be due to the connection between any of the phase wires or electrical parts of the circuit with the body, which is called current leakage. If there is a current leakage, the safety switch detects this current leakage and cuts off the circuit. This amount of small leakage currents are not detected by the miniature switch and cause fire in the building or electrocution for the user. The life-saving switches act quickly in a fraction of a second in the event of a leakage current and cut off the circuit.

The safety switch is also called differential current switch, residual current switch and differential current switch.

Life-saving switches are produced in three types: electromagnetic, electronic and combined models, which are classified according to the type of disconnection function.