Schneider Electric – 56170 (RH99M) – VigiPacT Residual Current Relay 0.03–30 A

The Schneider RH99M (PN 56170) is a VigiPacT series residual-current (earth-leakage) monitoring relay, designed for DIN-rail installation in low-voltage systems. It monitors protective conductor leakage via an external current transformer, providing adjustable protection from 0.03 A to 30 A, with settings for both pickup current and time delay. When leakage exceeds the set threshold, it trips and requires manual reset for safe restart.  

 Key Features & Specifications

• Part No: 56170 (RH99M, VigiPacT series)

• Leakage Setting: 0.03–30 A, 9 selectable thresholds via front-panel dial ()

• Time Delay: 0–4.5 s, with nine positions for precise setting  

• Supply Voltage: 12–24 VAC (50/60 Hz) or 12–48 VDC  

• Output Capacity: Up to 8 A switching current, with DIN-rail switching for MCCBs  

• Protection Type: Earth-leakage class A / AC, suitable for TN, TT, and IT earthing systems  

• Manual Reset: Front-button reset required after trip events  

• Power Consumption: Approx. 4 W  

• Mounting & Housing: DIN-rail IP40; W 54 × H 97 × D 74 mm; weight ~0.182 kg