Fire-rated circuit breaker CX2004-SE-R-3P-400A-B-SE-KS1 with tripping device UU PWP and signaling device US PWP

Fire disconnect switch – protection and safety of the installation

The CX2004-SE-R-3P-400A-B-SE-KS1 fire disconnect switch is a comprehensive solution designed to disconnect power in the event of a fire hazard. It consists of a triggering device (UU PWP) and a signaling device (US PWP) working with a disconnector in a dedicated housing. This is a basic but effective system that ensures a quick response and minimizes the risk of fire spreading.

Construction and principle of operation

The switch uses an overcurrent release that reacts to exceeding the current, opening the switch contact and interrupting the circuit. Auxiliary contacts are used to signal the status of the triggering and signaling devices. The switch power supply is protected by a phase relay, which ensures its operation even in the event of a voltage failure in one or two phases. The 230VAC release used guarantees reliable operation.

An important feature of this solution is the simplicity of the design – it does not have control continuity of the control wires between the triggering and executive device. This means that if the control wire is damaged, the switch will not operate automatically. Regular testing and monitoring of the wire condition should be remembered.

The triggering and signaling devices operate at 230VAC, which requires the use of appropriate wires and connections. The status of the disconnection is signaled by an LED on the signaling device.

Application and benefits

This fire disconnect switch is used in public buildings, industrial facilities and anywhere where effective power disconnection is required in the event of a fire in accordance with applicable regulations.

• Fast response: The switch instantly cuts off the power after detecting a hazard, minimizing the risk of fire spreading.
• Simple installation: The device design allows for easy mounting and integration with the existing electrical installation.
• Visual signaling: The signaling lamp informs about the status of the power disconnection, which facilitates the assessment of the situation.
• Protection against voltage failure: The phase relay ensures the operation of the switch even in the event of temporary interruptions in the electricity supply.
• Compliance with standards: The device meets the requirements specified in the Regulation of the Minister of Infrastructure and Construction regarding fire disconnect switches (PWP).
• Remote control option: When using an appropriate triggering device, the switch can be remotely activated in the event of a fire detected by the fire alarm system (SSP).

The set includes a triggering device UU PWP and a signaling device US PWP, ensuring a complete solution ready for installation.