R-K Electronics, Inc. Protection Relays & Systems ZVS-120A-F1C

The ZVR/S series is a zero speed switch for motor protection, detecting loss of rotational speed by monitoring current via a shunt or direct signal. It mounts on DIN rail or surface and uses a plug-in terminal block. This unit operates from 24 to 240 VAC, has a fixed 1-second time delay and 35mV sensitivity, and features a single-pole double-throw (SPDT) output rated at 10 A. The unit accepts up to 600 VAC or DC on its signal input, with an AC sensitivity of 38mV at ≤6Hz and 380mV at ≥60Hz, and hysteresis of 5% of set point. Operating temperature ranges from 0°C to 65°C, with storage from -40°C to 85°C. The case is vertical, weighing 8 oz, and fits within 5.875 inches in length for DIN rail mounting or 5.313 inches for surface mounting.