R-K Electronics, Inc. Protection Relays & Systems ZVS-120A-F2A

The ZVR/S series is a zero speed switch designed for motor protection by detecting loss of current. It mounts on DIN rail or surfaces and uses a plug-in terminal block. The ZVS-120A-F2A variant operates on 100-120VAC with a fixed 1-second time delay and 35mV sensitivity, delivering two normally open (2NO) contacts. It accepts an overvoltage up to 600VAC or DC on its sensing terminals and handles output ratings of up to 10A at 240VAC. The device operates from 0°C to 65°C and stores from -40°C to 85°C. Hysteresis is 5% of the set point, typical. The sensing frequency range is DC to 400 Hz with 60 Hz rejection of 10 times DC sensitivity at the most sensitive setting.