Industrial earth leakage protection Transformer with built-in earth leakage relay Description The WGBU Series is a compact earth leakage protection system. It is composed of a toroidal transformer with a built-in earth leakage relay. }} Multi-range electronic relay yy sensitivity can be adjusted to 0.03 ... 3 A The yy Trigger delay of 0.02 ... 1 ws, adjustable }} Type A relay with high frequency current filtering and high immunity. Monitoring in true root mean square (TRMS). }} LED indicators: yy Grid connection LED yy Pre-alarm and trigger LED: 1 flash every 2 s, leak between 25 and 50 % of the sensitivity selected; 1 flash every 1 s, leak between 50 and 75 % of the sensitivity selected; 1 flash every 0.5 s, leak exceeding 75 % of the sensitivity selected; permanently lit, trigger of the earth leakage protection. Features Earth leakage True root mean square (TRMS) Earth leakage transformer With built-in buttons, T & R Associated circuit breaker Contact or Circuit breaker + trigger coil • Power supply voltage • Trip due to leakage • Pre-alarm Remote Control (inputs) External Test Option Circuit breaker control Through an NO/NC switched relay, depending on the connection with the circuit breaker Features Auxiliary power supply Output contacts Operating temperature Construction features Fixing Application The WGBU series offers a reliable earth leakage protection, with simpler cabling and savings in the assembly time. In addition, installation is very simple, thanks to its compact dimensions. IP 20 Terminals, IP 41 back panel

Industrial earth leakage protection Transformer with built-in earth leakage relay The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A.

Industrial earth leakage protection Transformer with built-in earth leakage relay Connections Shunt coil Undervoltage coil