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L'édito de Vincent BedouinElectrical circuits protection
Electrical circuits protection
Against overcurrents and short-circuits
Two types of device are used to protect circuits against current overloads and short-circuits: the fuse switch-disconnector and the circuit breaker.
They cut off power in the event of a fault on the circuit.
Protection against prolonged overvoltages
These devices, increasingly used in street lighting for added safety and maintenance support they provide, detect any problem with “phase/phase” connection or any neutral break synonymous with temporary or prolonged voltages of 400V or more.
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FUSE SWITCH DISCONNECTOR
The simplest device for protecting circuits.
Works with a calibrated fuse cartridge.
As the neutral remains connected, the switch has to be opened manually to cut off power completely.
Also available in D0 or Neozed version (excluding isolation).
Advantages
High breaking capacity, compactness, price.
Both poles are mechanically cut off.
Simple to reset.
The defective circuit is easy to identify
VARISTORS
A varistor, used with a fuse switch disconnector, guarantees protection and easy detection of prolonged overvoltages.
CIRCUIT BREAKER
In the event of an overcurrent or short circuit, the circuit breaker automatically breaks the circuit.