The WRU-100A is a residual current relay with a built-in 25 mm transformer, forming a single assembly. Type A ultra-immunised, with high-frequency current filtering. True RMS measurement (TRMS).
Key Features
Measured at true RMS (TRMS).
Keyboard programming menu lock.
RGB backlit display.
Ultra-immunized type A differential protection.
High immunity against transients.
Filtering of harmonics and high-frequency currents.
Trigger adjustment between 80 and 100% of IΔn.
Inverse Trigger Curve.
RS-485 communications.
Technical Specifications
AC power supply
WRU-100A AC power supply
Nominal voltage
110 … 230 V ~
Frequency
50 … 60 Hz
Consumption
4 … 6.5 VA
Installation category
CAT III 300 V
External reset input for tripping
WRU-100A External reset input for tripping
Type
Voltage 110 … 230 V ~
Voltage measurement circuit
WRU-100A Voltage measurement circuit
Input impedance
94 kΩ
Digital relay outputs
WRU-100A Digital relay outputs
Nominal voltage
250 V ~
User interface
WRU-100A User interface
Display type
Custom LCD (negative)
LED
2
Keyboard
3 pushbuttons
Environmental characteristics
WRU-100A Environmental characteristics
Working temperature
-10 … +50 °C
Storage temperature
-20 … +70 °C
Relative humidity (without condensation)
5 … 95%
Protection class
IP40
Mechanical characteristics
WRU-100A Mechanical characteristics
Envelope
Self-extinguishing V0 plastic
Fastening
DIN 46277 (EN 50022)
Weight (kg)
0,25
Size (width × height × depth)
70 × 118 × 74 mm
Protection
WRU-100A Protection
LED indication
Voltage presence / Earth leakage tripping / Prealarm
Measure
True root mean square (TRMS)
Differential protection
WRU-100A Differential protection
Transformer
Built-in
Type
Type A ultra-immunised
Sensitivity (I∆n), A
30 mA / 100 mA / 200 mA / 300 mA / 500 mA / 750 mA / 1 A / 1,5 A / 2 A / 3 A / 5 A / 10 A / 30 A
The WRU-100A is designed to offer intelligent and advanced differential protection in electrical installations.
Thanks to its ultra-immunized type A technology, it provides high security for people and helps to guarantee continuity of supply, minimizing unwanted shots and the possible associated economic losses.
The display of the instantaneous leakage value on the display, together with the pre-alarm indications, allows you to know the status of the protected lines at all times and facilitates more efficient preventive maintenance.
In addition, its RS-485 communications, together with PowerStudio software, allow for real-time centralized monitoring and recording of historical data for further analysis.
Need more detailed information?
View the official product documentation, manuals and technical resources.
