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The main functions of the Vigirex Relays :
Vigirex relays measure the earth-leakage current in an electrical installation via their associated toroids. Vigirex relays may be used for:
A - Residual-current protection (RH10, RH21, RH99)
B- Earth-leakage monitoring (RMH or RH99)
C- Residual-current protection and earth-leakage monitoring (RH197P, RHUs and RHU).