A range of selectable earth leakage protection units housed in steel enclosures. The FDB21 is ideal for the protection of personnel working on installations which require interruptible RCD protection by design e.g. cold stores, unmanned radio stations, TV applications etc.

Complete with overload and short circuit protection, the FDB21 is fitted with an on/off switch enabling the RCD protection to be switched on or off as required by your application.

It should be noted that for fire protection, the overload and short circuit protection is maintained even when the RCD is switched off.

A Neon lamp indicates when the RCD is switched off.