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

The ABB CM‑ESS.2S (1SVR730830R0400) 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 3–600 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.2S / 1SVR730830R0400  

• Supply Voltage: 24–240 VAC/DC; low power consumption (~30 mA DC, 2.6 VA AC)  

• Monitoring Ranges: 3–30 V, 6–60 V, 30–300 V, 60–600 V AC/DC (TRMS)  

• Adjustability: Threshold, hysteresis (3–30 %), and trip delay (0.1–30 s) via front controls  

• Detection Modes: Configurable for over-voltage or under-voltage, plus phase loss detection  

• Outputs: 2 × SPDT (change-over); 4 A @ 250 VAC, both contacts available  

• Interface: LEDs for supply, alarm, and output status; DIP switch and pot controls  

• Mounting & Housing: 22.5 mm width; screw or push-in terminals; DIN rail; IP50 with UL94 V‑0 plastic  

• Certifications: CE, UL, cUL, EAC, RoHS; voltage surge (varistor) protected