Protection and Control
WGBU-70
Residual current relay
Code: P16012
Usefull diam.(mm): 70
IΔn (A): 0,03 … 3 A
Delay: 0,02…1 s
Mounting: Panel background
Overview
The WGBU Series is a compact residual current protection system. It is composed of a toroidal transformer with a built-in residual current relay.
Key Features
- Multi-range electronic relay — Adjustable sensitivity from 0.03 to 3 A.
- Adjustable trigger delay — Adjustable trigger delay from 0.02 to 1 s.
- Type A differential protection — High-immunity Type A relay with high-frequency current filtering.
- True RMS monitoring — Monitoring of residual current using true RMS (TRMS) measurement.
- Grid connection indication — LED indicator for grid connection status.
- Pre-alarm and trigger indication — LED flashes every 2 s for leakage between 25 and 50%, every 1 s for 50–75%, and every 0.5 s for leakage exceeding 75% of the selected sensitivity.
- Residual current trip indication — Permanently lit LED indicates activation of residual current protection.
Technical Specifications
AC power supply
| Nominal voltage | 110/230 V ~ ±20% |
|---|---|
| Frequency | 50/60 Hz |
AC power supply, insulation
| Test voltage (kV) | 2,5 kV ~ |
|---|
Digital relay outputs
| Nominal voltage | 250 V ~ |
|---|---|
| Nominal current | 6 A ~ |
| Resistive load (max.) | 250 Vac / 8 Aac |
Other digital relay outputs
| Electrical life | 2 × 10⁵ |
|---|---|
| Insulation voltage | 250 V ~ |
Environmental characteristics
| Working temperature | -10 … +50 °C |
|---|---|
| Protection class | IP20 (terminals), IP41 (rear panel) |
Mechanical characteristics
| Fastening | DIN rail |
|---|---|
| Weight (kg) | 0,375 |
| Size (width × height × depth) | 196 × 110 × 46 mm |
Protection
| Circuit breaker type | Contactor or circuit breaker + trigger coil |
|---|---|
| LED indication | Power supply voltage / Earth leakage tripping / Prealarm |
| Measure | True root mean square (TRMS) |
Differential protection
| Transformer | Built-in, WG series |
|---|---|
| Type | Type A ultra-immunised |
| Sensitivity (I∆n), A | 0,03 … 3 (selectable) |
| Delay time (t∆) | 0.02 … 5 s (selectable) |
Standards
| Standards | IEC 1008, IEC 255-5, UNE 801-2, UNE 801-3, UNE 801-4, UNE 60730-1 |
|---|
Applications
The WGBU series offers a reliable residual current protection, with simpler cabling and savings in the assembly time. In addition, installation is very simple, thanks to its compact dimensions.
Need more detailed information?
View the official product documentation,
manuals and technical resources.
