ABB – CM-IWN.5 – Insulation Monitoring Relay 0–400 VAC/600 VDC (1SVR650660R0400)

The ABB CM‑IWN. (Order Code SVRR) is a multifunction insulation resistance monitoring relay designed for unearthed (IT) AC/DC systems up to  VAC or  VDC. Compliant with IEC ‑, it provides configurable thresholds for pre-warning and shutdown, offering reliable protection for photovoltaic systems, industrial controls, and electrical safety applications.

Key Specifications:

• Model / Part Number: CM‑IWN. / SVRR  

• System Voltage: – VAC / – VDC (expandable to  VAC /  VDC with coupling unit CM‑IVN)  

• Supply Voltage: – VAC/DC  

• Insulation Thresholds:

  • R (shutdown): adjustable – kΩ (in  kΩ steps)

  • R (pre-warning): – kΩ ( kΩ steps)

• Configurable Output Relays: × C/O or × C/O  

• Size:  mm DIN-rail width – half-module  

• LED Indicators: Power (green), fault (red), relay status (yellow)  

• Functions: Test/reset button, interrupted-wire detection, selectable auto/manual reset  

• Safety Standard: IEC/EN ‑