Differential Relay Type B Circutor RGU-10B

The Circutor RGU-10B Type B Differential Relay, reference P11951, is an advanced device for protection and monitoring of differential current intensity. This relay is designed for applications in electrical systems that require the detection of alternating, direct, or mixed differential currents, making it an indispensable tool for ensuring the safety and reliability of complex electrical installations. It is ideal for protecting sensitive equipment and systems such as variable speed drives, UPS (Uninterruptible Power Supplies), photovoltaic installations, and motor control systems.

Advanced Type B Differential Protection:
The RGU-10B is designed according to the requirements of the IEC 60755 standard for Type B relays, meaning it is capable of detecting leakage currents in AC (alternating current), DC (direct current), or even mixed currents with components in both. This capability makes it particularly useful in applications where leakage currents may have diverse characteristics, such as in systems with variable speed drives or photovoltaic installations, where residual currents may not be exclusively alternating.

Compatibility with WGC-TB Protection Transformers:
The RGU-10B connects through a WGC-TB series differential transformer, allowing it to accurately measure leakage current in single-phase or three-phase installations. This feature ensures that the device can easily adapt to different network configurations, enabling its use in a wide range of electrical applications. The relay is capable of measuring differential currents with an adjustable sensitivity from 0.1 A to 3 A, providing flexibility to tailor the protection level to the specific requirements of the installation.

Display and Control via LCD Display:
The RGU-10B incorporates a backlit LCD display, which allows clear viewing of operating parameters and the status of the differential protection system. The display shows key information, such as the instantaneous leakage current, the protection trip value, and alarm states. In the event of a trip, the display changes to red, providing an immediate visual signal that a leakage condition requiring attention has occurred.

Additionally, the device features two LEDs indicating the system status and can be easily configured via the control panel, allowing the adjustment of parameters such as trip sensitivity and delay time.

Programmable Relay Outputs and Pre-Alarm:
The RGU-10B has two programmable relay outputs, one main and one pre-alarm, allowing users to programme the relay to act before a definitive trip occurs, providing an early warning of potential problems in the installation. The pre-alarm function is especially useful for carrying out preventive maintenance, avoiding unexpected failures, and ensuring the continuity of electrical service.

The main relay output can be used to control a contactor or activate an automatic trip system of a switch, allowing complete protection of the installation. Additionally, the relay features a remote control input, facilitating remote tripping and resetting, enhancing control and automation capabilities in critical installations.

Versatile Applications:
The RGU-10B is ideal for uninterruptible power systems (UPS), variable speed drives, photovoltaic installations, and motor control, where leakage currents can be complex and variable. Thanks to its ability to detect leaks in DC (direct current) and AC (alternating current), this differential relay is perfect for installations operating in electrical environments with diverse energy sources, such as those combining solar energy and conventional electrical grids.

Outstanding Technical Features:

• Power Supply Voltage: 230 VAC ± 20%, with a consumption of 6 VA, suitable for standard installations.
• Trip Sensitivity (IΔn): Adjustable between 0.1 A and 3 A, allowing precise adaptation to the protection requirements of each installation.
• Delay Time (tΔ): Adjustable between 0.1 and 10 seconds, offering options for fast or selective protection according to the installation needs.
• Relay Output Capacity: The relay outputs support up to 250 VAC and 10 A, with a load capacity of 2500 VA, ensuring that the relay can control a wide variety of protection and disconnection devices.

Easy Installation and Durability:
The RGU-10B is designed for easy mounting on a DIN rail, with a compact size of 52.5 x 85 x 67.9 mm, facilitating its integration into existing electrical panels. Its robust construction includes a protection rating of IP20 at the terminals and IP41 at the front, ensuring its durability in controlled environments.

Standards and Safety:
This relay complies with international standards IEC 60947-2 (M), IEC 62020, and IEC 60755, ensuring it meets the highest standards of safety and reliability in differential protection. Its design guarantees safe operation up to an altitude of 2000 metres, making it suitable for a wide range of industrial and commercial applications.

The Circutor RGU-10B Type B Differential Relay is an advanced solution for differential protection in complex electrical systems. Its ability to detect leakage currents in AC and DC systems, along with its pre-alarm and programmable output features, make it an ideal choice for critical installations requiring reliable and adaptable protection.