Type A residual current protection

Description

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).

Main 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.

Applications

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.

AC power supply

External reset input for tripping

Voltage measurement circuit

Digital relay outputs

User interface

Environmental characteristics

Mechanical characteristics

Protection

Differential protection

Standards