Protection and Control
WRU-10
Residual current relay
Code: P14035
Useful diam.(mm): 28
IΔn (A): 0,03 … 3 A | 0,03 …30 A
Power supply (Vac): 230 Vac
Delay: 0,02 … 10 s, INS, SEL
Overview
Electronic residual current protection relay with built-in 28 mm transformer, forming a single unit. Super-immunised type-A, with high-frequency current filtering and high immunity. True root mean square (TRMS) measurement.
Key Features
- Display with LEDs and display:
- Residual current protection parameters.
- Protection trip current.
- Protection status messages, etc.
- Unit with three programmable contact output relays, one switched and two single. The main relay is for the protection associated with the contact or trigger relay of the circuit breaker while the two others are for the prealarm.
- It also has a voltage-free input for external tripping and rearming.
- Assembly on DIN 46277 rail (EN 50022), 3 modules.
- Connection by pluggable terminal strips.
Technical Specifications
AC power supply
| Nominal voltage | 230 V ~ ±30% |
|---|---|
| Frequency | 50/60 Hz |
| Consumption | 4,5 VA |
External reset input for tripping
| Type | Voltage-free, not insulated |
|---|
Digital relay outputs
| Nominal voltage | 230 V ~ |
|---|---|
| Nominal current | 0,25 A ~ |
| Nominal load | 62,5 VA |
Other digital relay outputs
| Nominal voltage | 250 V ~ |
|---|---|
| Nominal current | 5 A ~ |
| Nominal load | 1250 VA |
Environmental characteristics
| Working temperature | -20 … +70 °C |
|---|---|
| Relative humidity (without condensation) | 95% |
| Protection class | IP20 |
Mechanical characteristics
| Fastening | DIN 46277 (EN 50022) |
|---|---|
| Weight (kg) | 0,19 |
| Size (width × height × depth) | 52.5 × 85 × 75 mm |
Protection
| LED indication | Voltage presence / Earth leakage tripping / Prealarm |
|---|---|
| Measure | True root mean square (TRMS) |
Differential protection
| Type | Type A ultra-immunised |
|---|---|
| Sensitivity (I∆n), A | 0,03 … 3 / 5-10-30 (Setup) |
| Delay time (t∆) | Direct setting: 0.02 … 1 s / Programmable: 3-5-10 s / Inverse curve: Instantaneous or selective |
Standards
| Standards | IEC 60755, IEC 60947-2-M, UL 1053 |
|---|---|
| Certifications | CE, UL LISTED Certification |
| Electrical safety, Maximum height (m) | 2000 |
Electrical safety
| Insulation | Double-insulated electric shock protection class II (IEC 61010-1) |
|---|
Applications
WRU-10 relays enable smart differential protection. Their design features guarantee maximum security and electrical service continuity, avoiding unwanted tripping.
Viewing the instantaneous leakage value on the display, together with the prealarm indicators, makes it possible to obtain information on the status of lines to be protected, and to perform adequate preventive maintenance.
Need more detailed information?
View the official product documentation,
manuals and technical resources.
