Differential Relay Type A Ultra-immune Circutor WRU-10

The Circutor WRU-10 differential relay, reference P14035, is an advanced device designed to protect electrical installations by detecting earth leakage currents, preventing potential damage and enhancing operational safety. This type A ultra-immune differential relay is ideal for environments where the continuity of electrical service is essential, as it features a high immunity system that filters high-frequency currents, preventing untimely trips and ensuring reliable and efficient protection.

Compact and functional design:
The WRU-10 is characterised by its compact design, with only 3 modules wide and installation on a DIN rail (DIN 46277, EN 50022), making it easy to integrate into existing electrical panels without taking up too much space. It incorporates a differential transformer in its 28 mm structure, forming a single unit with the relay. This allows for quick and easy installation without the need for additional transformers.

Advanced display and control:
The device is equipped with a display and LEDs that allow you to see the status of the differential protection, including the leakage current, pre-alarm messages and the protection status. The ability to visualise the instantaneous leakage value on the display provides a clear view of the protected lines' status, enabling more efficient preventive maintenance and avoiding problems before they become critical failures.

Adjustable and flexible differential protection:
The Circutor WRU-10 allows you to adjust the differential sensitivity (IΔn) within a range from 0.03 A to 30 A, making it an extremely versatile device for different applications and levels of protection. Moreover, the delay time (tΔ) can be set between 0.02 and 10 seconds, providing options for instantaneous or selective protection according to the installation's needs. This type of flexibility ensures that the device can adapt to various operational situations and electrical configurations.

Pre-alarm and programmable output relays:
The WRU-10 includes a pre-alarm system, allowing the detection of potential problems before significant failures occur. Additionally, the device features three programmable output relays: a main relay used for protection associated with a contactor or the trip coil of an automatic switch, and two additional relays for the pre-alarm. These relay outputs allow for precise control and quick response upon leakage current detection, enhancing installation safety and reliability.

High immunity and true RMS measurement (TRMS):
The WRU-10 differential relay is designed to ensure maximum electrical safety. Its true RMS measurement (TRMS) technology ensures accurate detection of leakage currents, even under distorted voltage conditions or with harmonics present in the electrical network. Additionally, its ultra-immune technology makes it extremely resistant to electrical disturbances, preventing unwanted trips caused by transient or high-frequency currents.

Applications and benefits:
The Circutor WRU-10 is ideal for use in a wide range of applications, including industrial, commercial and residential installations. Due to its design features, it ensures maximum safety and continuity in the electrical service, avoiding unnecessary interruptions and ensuring the protection of people and equipment. It is especially useful in installations where the continuity of the electrical supply is critical, such as hospitals, data centres or continuous production facilities.

Key technical features:

• Power supply voltage: 230 Vac ± 30%, ensuring its operation in common electrical networks.
• Operating frequency: 50/60 Hz.
• Sensitivity (IΔn): Adjustable between 0.03 A and 30 A, adaptable to various differential protection applications.
• Delay time (tΔ): Configurable between 0.02 s and 10 s, allowing for quick or selective protection as needed.
• External inputs for trip and reset: The relay features a voltage-free input for performing external trips and resets, facilitating its integration into automated systems.

Installation and durability:
The relay is designed for quick mounting on a DIN rail, with connections via plug-in terminals, simplifying installation and maintenance. Its housing is made of durable materials and has an IP20 protection rating, making it suitable for use in controlled environments. Additionally, it can operate within a temperature range of -20°C to +70°C, ensuring its reliability in various environmental conditions.

In summary, the Circutor WRU-10 differential relay is an advanced, flexible and reliable solution for differential protection in electrical installations. Its adjustable capability, high immunity to disturbances and pre-alarm features make it an ideal choice for ensuring safety and service continuity in a wide range of electrical applications.