Type A differential relay central ultra-protected Circutor CBS-40A

The A-type differential relay central Circutor CBS-40A, reference P12A70, is a device designed to provide robust and efficient differential protection in electrical installations. This 3-module device is specifically designed to ensure electrical safety by controlling up to four differential protection networks simultaneously, offering high immunity to high-frequency currents and ensuring a quick and effective response to potential electrical faults.

Functionality and main features

The CBS-40A is equipped with four independent programmable relays, allowing control of up to four external toroidal transformers from the WGC/WGS series, making it a comprehensive solution for differential protection in medium to large-scale installations. Additionally, the device incorporates a pre-alarm relay to warn of potential events before a trip occurs, providing an additional layer of safety.

One of the standout features of this device is its superimmunized A-type relay, which is capable of filtering high-frequency currents, making it highly resistant to electrical disturbances, providing accurate measurement in true root mean square (TRMS). This feature ensures that interference in electrical networks does not affect the operation of differential protections, which is essential for critical installations.

Sensitivity and adjustable delay

The sensitivity range of the CBS-40A is broad, adjustable from 0.03 A to 30 A, allowing the device to be tailored to different types of installations and protection needs. Additionally, the delay time is fully configurable, from 0.1 to 5 seconds in various options, facilitating customization to adapt to the specific characteristics of each electrical network. These adjustments allow the device to act precisely, avoiding unnecessary trips that could disrupt the power supply.

Interface and control

The device features a negative LCD display and two indicator LEDs, which provide real-time information about the status of protections and connections. Furthermore, its three-key keyboard allows for quick and easy adjustments and configurations without the need for additional tools. This facilitates the operation and maintenance of the device, ensuring that protection parameters are always optimized.

Installation and compatibility

The CBS-40A is designed to be installed on a DIN rail, simplifying its integration into standard electrical panels. Its V0 self-extinguishing plastic enclosure ensures greater durability and safety, protecting internal components from potential fires or overheating. Additionally, the device is certified under international standards such as IEC 60947-2-M and IEC 62020-1, ensuring its quality and safety.

Technical specifications:

• Code: P12A70
• Number of relays: 4 differential trip relays, 1 pre-alarm relay
• Sensitivity (IΔn): Adjustable from 0.03 A to 30 A
• Power supply: 110-230 V AC
• Delay: Adjustable from 0.1 to 5 seconds
• Frequency: 50/60 Hz
• Consumption: 7.5 VA
• Sensor type: Type A (WGC)
• Inputs: For connecting external toroidal transformers
• Outputs: 4 relay outputs, 1 pre-alarm relay
• Size: 52.5 x 118 x 74 mm
• Weight: 0.303 kg
• Protection degree: IP 30 (IP 40 on the front)
• Installation category: CAT III 300 V

Standards and safety

The CBS-40A complies with major international standards such as IEC 60947-2-M and IEC 62020-1, ensuring its reliability and safety in any environment. Additionally, it is designed to operate over a wide temperature range, from -10 ºC to +60 ºC, making it suitable for use in different types of installations and environmental conditions.

Additional features:

• Superimmunized A-type relay with filtering of high-frequency currents.
• 4 differential trip relays and 1 pre-alarm relay for enhanced protection.
• Sensitivity adjustment from 0.03 A to 30 A.
• Configurable delay time from 0.1 to 5 seconds, adapting to installation needs.
• LCD display for real-time parameter visualization.
• Compatible with external WGC/WGS toroidal transformers.

In summary, the Circutor CBS-40A differential relay central is an advanced solution for differential control and protection in electrical installations, providing a high level of safety, reliability, and energy efficiency. Ideal for installations that require robust protection adaptable to different operating conditions.