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Home Blog User guide: Charging stations differential switch

differential switch

3372 Vues Posté sur: 10/07/2020
Posté par: Antoine

What is a differential switch and what is its role?

A differential switch is a circuit breaker present in electrical panels and which automatically cuts the supply of an electrical circuit in the event of a current leak. It ensures the safety of persons located close to the devices by protecting them against an electric shock which has arisen, for example, following the contact of a stripped current wire .

How does it work?

The differential switch continuously measures and compares the intensity of the incoming current (by the phase terminal) and that of the outgoing current (by the neutral terminal) an electrical circuit. These two values ​​must be equal. A difference between the two intensities means that the circuit has a current leak. When the difference is greater than the switch's (sensitivity) threshold, the switch interrupts the flow of current in the circuit, thereby protecting people against electric shock or electric shock. While it is true that the differential switch protects people from the risks associated with electrification, it does not detect overloads or short circuits. It must then be installed with a circuit breaker . The latter detects and prevents an overvoltage, overload or short-circuit damaging your electrical installation, your devices. The circuit breaker therefore mainly protects the equipment and the building. The differential switch does not have the same functions as a circuit breaker. These two devices are therefore complementary.

What is the advantage of using a differential switch on the domestic line of a charging station?

The use of a differential switch on the domestic line of a charging station guarantees safety by protecting you from electric shocks linked to a possible malfunction of a device while the circuit breaker protects the battery of the electric vehicle, but also the domestic installation against possible overcharges and overcurrents.

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