Fire-resistant circuit breaker CX2004-SE-R-3P-250A-B-P-KS2 with tripping device UU PWP and signaling device US PWP

Fire disconnect switch – safety for installations and people

This fire disconnect switch is a comprehensive solution designed to protect electrical installations from the effects of short circuits and overloads that can lead to fire. Equipped with a tripping and signaling device, it provides a quick response in the event of a hazard and informs about the system status. It is a basic element of fire protection systems, required in many building facilities.

Construction and application

The switch consists of a disconnector placed in a dedicated housing, equipped with an overcurrent trip. Auxiliary contacts are used to signal the status of the tripping and signaling device. The use of a phase shift ensures reliable operation even in the event of a voltage loss in one or two phases. The whole is mounted on a solid foundation, which ensures stability and safety of use. The device is particularly useful where reliable protection against fire caused by electrical failures is required – in public buildings, industrial halls or warehouses.

Key features and benefits

• Complete set: The set includes an executive device (UW PWP), tripping (UU PWP) and signaling (US PWP), which eliminates the need for additional purchases and ensures full functionality immediately after installation.
• Wide voltage range: 230VAC trigger ensures compatibility with most electrical installations.
• Emergency power supply: Phase shift maintains the power supply to the trigger even with a voltage loss on one or two phases, which increases the reliability of operation.
• Durable construction: Housing with IP54 protection class and environmental class 2 guarantees resistance to weather conditions and allows installation both indoors and outdoors.
• Status signaling: The signaling device informs about the status of the switch, which facilitates monitoring and quick response in the event of a failure.
• CNBOP certificate: It has a National Technical Assessment Certificate No. 063-UWB-0426, confirming compliance with applicable safety standards.
• Adapted for outdoor use: Environmental class 2 and IP54 protection class allow mounting the device in the open air without fear of damage caused by weather conditions.

Technical parameters and dimensions

The switch is 400 mm wide, 820 mm high (plus 250 mm cable pocket and 900 mm foundation) and 285 mm deep. The rated current is 250A, and the bottom cable entry allows connection of cables with a maximum cross-section of 5x150 mm². The executive device is NSX250F 36kA AC 3P3D 250A TMD. It is worth remembering about environmental class 2 and operating temperature range from -25°C to +75°C.