Based on this product's specifications, here are some alternatives and similar models
FF phase loss and asymmetry relay CZF-B 10A 1NO 4s 55V
Summary description:
FF CZF-B is a phase loss and phase asymmetry protection relay designed for monitoring three-phase supplies. It features a single normally open contact (1NO), rated switching current 10 A, operating delay 4 seconds and a nominal voltage parameter 55 V. Suitable for protecting motors and equipment from phase loss, phase reversal or imbalance in industrial and building electrical installations.