R-K Electronics, Inc. Protection Relays & Systems ZVR-240A-AAB

The ZVR series is a zero speed switch designed for motor protection by detecting loss of rotational speed through current sensing. It mounts on DIN rail or surface and uses a plug-in terminal block. The part supports AC supply voltages of 208-240 VAC, with a sense range of 35 mV to 430 mV AC/DC and a maximum input voltage of 600 V AC or DC. It features adjustable sensitivity and time delay (0.5-40 seconds), a fixed 1-second delay option, and SPDT output contacts (1 NO, 1 NC). Hysteresis is 5% of the set point, and it operates from 0°C to 65°C with storage from -40°C to 85°C. The unit draws 2 W and has a maximum V-A rating of 180 VA. It is packaged in a vertical case weighing 8 oz., with dimensions of 5.875 in. for DIN rail mounting and 5.313 in. for surface mounting.