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
- The sensitivity can be adjusted to 0.03 ... 3 A
- 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:
- Grid connection LED
- 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