Differential Relay Type B Circutor RGU-100B

The Circutor RGU-100B differential relay (code P11961) is a protection and monitoring device for differential current intensity designed for installations with single-phase or three-phase loads that require advanced protection against leakage currents, both in alternating and direct current. This relay is compatible with differential transformers from the WGB series, and is particularly suitable for applications involving loads with direct or mixed components, such as speed drives, UPS, photovoltaic installations, and electric vehicle charging systems.

Type B differential protection: The RGU-100B offers advanced type B differential protection, meaning it can detect sinusoidal alternating currents and residual pulsing currents in both AC and DC, with adequate accuracy for frequencies up to 2 kHz. This makes it perfect for protecting critical installations, such as photovoltaic systems, speed drives, or industrial equipment with complex loads.

Flexible sensitivity and delay adjustment: This relay is fully programmable, with an adjustable sensitivity from 0.03 to 3 A and a configurable delay time from 0.1 to 5 seconds, allowing users to tailor the protection to the specific needs of their installation. The relay also includes a pre-alarm function, which allows for warnings about potential issues before a system trip occurs, enhancing fault prevention.

Advanced communications and monitoring: The RGU-100B incorporates RS-485 communications and uses the Modbus/RTU protocol, allowing it to integrate into energy management and remote monitoring systems. This communication capability facilitates real-time data collection and analysis, enabling more efficient control of electrical installations. The relay also features a remote control input that allows for additional remote control of its functions.

Compact design and easy installation: This relay is designed for installation on a DIN rail, making it easy to integrate into electrical panels and power distribution systems. Its backlit LCD display shows real-time leakage data, changing to red when a leakage requiring action is detected. Additionally, the relay is housed in a V0 self-extinguishing plastic enclosure, ensuring its durability and safety in industrial environments.

Technical specifications:

• Communication protocol: Modbus/RTU.
• Differential current: Adjustable from 0.03 to 3 A.
• Power supply voltage: 230 VAC.
• Delay: Adjustable between 0.1 and 5 seconds.
• Pre-alarm relay: Included.
• Communications: RS-485.
• Relay outputs: 1 relay with a capacity of 6 A.
• Dimensions: 52.5 x 118 x 74 mm.
• Weight: 0.188 kg.
• Mounting: DIN rail.

Typical applications: This differential relay is ideal for the protection of photovoltaic systems, speed drives, uninterruptible power systems (UPS), and electric vehicle charging points, where leakage currents may have complex characteristics due to the presence of DC components.

System advantages:

• Advanced type B protection that ensures high precision and safety in detecting leakage currents in both AC and DC.
• Programmable and adjustable, with the ability to configure sensitivity and delay time.
• Easy integration into monitoring systems via Modbus/RTU and RS-485 communications.
• Compact and robust design, ideal for industrial and commercial electrical panels.

The Circutor RGU-100B differential relay is an ideal solution for installations requiring advanced differential protection in environments with complex loads. With its configuration flexibility and integration capability, it provides reliable and efficient protection for a wide range of electrical applications.