The ABB RXMVB4 Master Trip Relay is a specialized protection relay used in electrical systems for the safe operation and protection of electrical circuits. It is a part of ABB’s range of protection and control relays, specifically designed to respond to abnormal conditions in the electrical system, such as faults or unsafe operating conditions, by initiating a trip (disconnecting) of the circuit to prevent damage to equipment and ensure system safety.

The RXMVB4  is primarily used as a master trip relay in substations and electrical installations. Its role is to manage the coordination of various trip signals and ensure proper disconnecting of the circuit in the event of faults such as overcurrent, short circuits, or other abnormal conditions.

The RXMVB4  relay is responsible for receiving inputs from other protection devices (e.g., overcurrent relays, differential relays) and activating the appropriate trip signals to protective devices (such as circuit breakers).

The RXMVB4  master trip relay ensures system protection by enabling the rapid disconnection of faulty sections of the network, limiting damage to critical equipment and preventing more widespread system failure.

It RXMVB4  offers dependable fault clearing to safeguard electrical installations against damage caused by short circuits, overcurrent, and other fault conditions.

The RXMVB4  relay allows coordinated control with other protection relays, ensuring that trips happen in a sequence that minimizes system downtime and prevents unnecessary disconnections of non-faulted parts of the system.

The RXMVB4  operates on a DC supply voltage range, often around 24V DC or 48V DC, which is standard for most industrial control and protection relays.

The relay’s output contacts are typically rated for handling high current (e.g., 5A to 10A) at a certain voltage (e.g., 250V AC/DC), allowing them to control larger circuit breakers or isolation devices.

The RXMVB4  relay is built to withstand typical industrial conditions, with an operating temperature range of -20°C to 60°C (or similar), suitable for operation in a wide range of environments.

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