RELAY:TYPE: CM#ESS.1S,VOLTAGE MONITORING. ADDITIONAL TEXT; THE CM-ESS.1S IS A SINGLE-FUNCTIONAL VOLTAGE MONITORING RELAY FROM THE CM SINGLE-PHASE MONITORS RANGE. THIS MONITORING RELAY OPERATES WITH A RATED CONTROL SUPPLY VOLTAGE OF 24 – 240 V AC / DC AND HAS A 1 C/O (SPDT) OUTPUT CONTACT RATED AT 250 V / 4 A. IT PROVIDES A RMS MEASURING PRINCIPLE FOR DC AND AC VOLTAGES WITH 4 MEASURING RANGES: 3-30 V, 3-60 A, 30-300 V AND 60-600 V AND WORKS ACCORDING TO THE OPEN-CIRCUIT PRINCIPLE. THE CM-ESS.1S IS CONFIGURABLE FOR OVER- OR UNDERVOLTAGE MONITORING##CM#ESS.1S# MPN NO.: 8236623 MANUFACTURER: ABB, PART NO: 1SVR730830R0300, MODEL NO: CM#ESS.1S.