The ABB CM‑ESS.S (SVRR) is a reliable single-phase voltage monitoring relay for TRMS monitoring in AC/DC circuits. Compact and DIN-rail mountable, it offers four selectable measurement ranges from – V, adjustable hysteresis and delay, and two SPDT output relays to protect against over- and under-voltage conditions—perfect for power distribution and control panel safety.

Key Features:

Model: CM‑ESS.S / SVRR
Supply Voltage: – VAC/DC; low power consumption (~ mA DC, . VA AC)
Monitoring Ranges: – V, – V, – V, – V AC/DC (TRMS)
Adjustability: Threshold, hysteresis (– %), and trip delay (.– s) via front controls
Detection Modes: Configurable for over-voltage or under-voltage, plus phase loss detection
Outputs: × SPDT (change-over);  A @  VAC, both contacts available
Interface: LEDs for supply, alarm, and output status; DIP switch and pot controls
Mounting & Housing: . mm width; screw or push-in terminals; DIN rail; IP with UL V‑ plastic
Certifications: CE, UL, cUL, EAC, RoHS; voltage surge (varistor) protected

ABB – 1SVR730830R0400 – CM-ESS.2S Voltage Monitoring Relay, 24–240 VAC/DC

ABB – 1SVR730830R0400 – CM-ESS.2S Voltage Monitoring Relay, 24–240 VAC/DC