ABB – 1SVR450081R0000 (CM‑KRN) – Contact Protection/Monitoring Relay 220–240VAC

The ABB CM‑KRN contact protection relay (P/N 1SVR450081R0000) safeguards and monitors the integrity of control contacts by detecting excessive bounce or open‑circuit resistance. Once the monitored contact engages within the set time, a clean, stabilized relay output is provided. This relay is ideal for applications where reliable contact closure is essential, such as in motor starters, interlock circuits, and safety systems.

 Key Features

• Model / P/N: 1SVR450081R0000 (CM‑KRN)  

• Function: Monitors switch‑on/off contact resistance and applies on‑delay timing; provides 2 change‑over (DPDT) relay outputs  

• Supply Voltage: 220 – 240 VAC, 50/60 Hz  

• Control Range (Monitored Resistance): 6–10 kΩ or 15–20 kΩ selectable  

• Timing Delay: Adjustable ON‑delay from 0.05 to 30 s  

• Relay Outputs: DPDT contacts rated 250 VAC / 4 A (AC‑15)  

• Operating Range: –25 °C to +65 °C; screw‑clamp terminals; IP20 protection; 45 × 78 × 100 mm