Fire-resistant circuit breaker CX2004-SE-W-3P-250A-36kA-B-SE-KS1 with tripping device UU PWP and signaling device US PWP SE-W-3P-250A-36KA-B-SE-KS1

Fire protection circuit breaker – safety and reliability in one solution

This fire protection circuit breaker, designated CX2004-SE-W-3P-250A-36kA-B-SE-KS1, is a key element of fire protection systems, providing effective power disconnection in the event of a hazard. It is a solution designed to work with initiating and signaling devices, offering basic but proven functionality. Equipped with an overcurrent trip, it reacts to exceeding current, protecting the installation and minimizing the risk of fire spreading. The set includes an initiating device UU PWP and a signaling device US PWP, ensuring the completeness of the system.

Construction and operating principle

The circuit breaker is based on a proven design with a disconnector placed in a dedicated housing. Auxiliary contacts are used to signal the status of the initiating and signaling devices. The use of a 230VAC trip guarantees reliable operation even after a voltage loss on one or two phases – the power necessary for operation is supplied by a phase relay. Importantly, this model does not have wire continuity control to the initiating device – this means that in the event of a wire damage or voltage loss, the circuit breaker will not operate automatically. Therefore, this is the simplest solution, but requiring appropriate risk analysis and use in appropriate conditions.

Advantages and application

• Fast reaction: The overcurrent trip ensures quick power disconnection in the event of a hazard detection.
• Complete set: The set includes an initiating and signaling device, which simplifies installation and configuration.
• Phase independence: The power supply of the circuit breaker supplied by the phase relay ensures its operation even with a voltage loss in one or two phases.
• Status signaling: Auxiliary contacts allow connection of an optical signal indicating the status of the circuit breaker.
• Application: Ideal for installations requiring basic fire protection, where the lack of wire continuity control is not a critical problem. It works well in public utility facilities, industrial buildings and anywhere where effective power disconnection is required in the event of a fire.
• Simple installation: The lack of advanced functions facilitates installation and configuration of the device by a qualified installer.

Important information for installers

This model of circuit breaker does not have a wire continuity control function to the initiating device. This means the need for careful verification of the correctness of connections and regular inspections of the installation. Remember to select the correct trip voltage (230VAC) and match the contacts of the initiating and signaling devices to this voltage. When using this solution, consider the potential risk associated with the lack of automatic disconnection in the event of wire damage or voltage loss.