Using a 4STD series flux concentrators allows the operating range of Type A/F (TDC series) and Type B (TDB series) earth leakage sensors to be extended, up to 6000A line current. This avoids sensor saturation and nuissance tripping of the relay.
4STD160 - Flux concentrator for TDC160/TDB160 sensor
4STD210 - Flux concentrator for TDC210/TDB210 sensor
