Schneider 56273 RH99P Residual Current Protection Relay

Basic Info

• Model No.: 56273 (RH99P, Vigirex series)
• Type: Panel-mounted earth leakage / residual current protection relay
• Auxiliary supply: 220–240 VAC 50/60 Hz (also supports 400 Hz)
• Protection class: Type A, compatible with TT, TN‑S, IT earthing systems

Core Technical Parameters

1. Adjustable leakage sensitivity
    
   9 selectable thresholds: 30 mA ~ 30 A, covers human safety protection and equipment fire prevention
2. Adjustable tripping time delay
    
   9 settings from instantaneous up to 4.5 s, supports selective coordination of multi-level distribution circuits
3. Max monitored system voltage: Up to 1000 VAC
4. Reset mode: Local manual reset after fault trip; supports remote reset & remote test function
5. Matching accessory: Must work with Schneider toroid current transformers (RH‑A / RH‑TOA series) to detect earth fault current

Key Functions

• Personal safety protection against direct/indirect electric shock
• Fire hazard prevention caused by insulation leakage aging
• Motor & electrical equipment earth fault protection
• Built-in Test button for regular circuit inspection; Fault indicator light for leakage alarm status
• Sealable setting dial to avoid unauthorized parameter tampering

Mechanical & Environmental

• Mounting: Front panel flush installation (4-module size)
• Front protection grade: IP40
• Vibration resistant, stable for industrial workshop environments

Application Scenarios

• Factory low/medium voltage distribution cabinets
• Pump, fan, compressor motor control circuits
• Commercial building power distribution systems
• Mining, chemical, manufacturing industrial power supply loops