BH-DJ-ZBH Series Residual (Leakage) Current Protective Relay uses a plastic injection casing, aluminum oxide surface panel with a transparent dust cover. Model DJ-ZBH1 is panel mount;Model DJ-ZBH2 is DIN Rail mount. 
This series of products have 4trip current settings and 2 break time settings, which can be selected by toggling the switches. It has a Test and a Reset button,as well as a Remote Reset terminal. 
This series is preferred by our customers for its good applicability and cost effectiveness.