Surge Protective Devices (SPD) are used to protect the electrical installation, which consists of the consumer unit, wiring and accessories, from electrical power surges known as transient overvoltage.
It protects electrical installations against direct lightning strokes. It can discharge the back-current from lightning spreading from the earth.
Surge protection devices that can discharge partial lightning current
DP MCB - Double Pole Miniature Circuit Breaker
SP MCB - Single Pole Miniature Circuit Breaker
RCCB - Residual Current Circuit Breaker
SPD - Surge Protection Device
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