Undervoltage and phase failure sensor CZF-BR contacts: 1P, I=10A, adjustable threshold: 165-180V, 2 modules

Phase Failure and Loss Protection – Reliable Installation Protection

This phase failure sensor, designated CZF-BR, is a key element ensuring the safety and continuity of electrical installation operation. Designed to monitor the presence of all phases in the power supply network, it protects devices from damage caused by voltage asymmetry or complete loss of one phase.

Thanks to this, both installers and end-users can rely on stable and safe operation of connected receivers.

Functionality and application

CZF-BR is a modular device (2 modules), designed for mounting on a TS-35 rail. Its main task is to detect phase failure and control voltage asymmetry. The trigger threshold for asymmetry is fixed, simplifying configuration and ensuring reliable operation. The device has one changeover contact (1P) with a current capacity of 10A, which can be used to signal an alarm or disconnect the receiver in the event of a fault. The voltage measurement range is from 140 to 270V, making it a universal solution for various power networks.

Advantages and benefits

• Protection against damage: Protects motors, pumps and other devices sensitive to voltage asymmetry, preventing premature wear or failure.
• Safety of use: Ensures safe operation of the electrical installation by quickly responding to phase failure or voltage asymmetry.
• Easy installation: Compact dimensions (height 90 mm, depth 65 mm) and mounting on a TS-35 rail facilitate installation in electrical switchboards.
• Reliability: Made of high-quality materials, guarantees long-lasting and trouble-free operation.
• No external power supply required: The device does not require an additional power source, simplifying installation and reducing operating costs.
• Screw connection: Provides a secure and durable connection of electrical wires.
• Fast response: Minimum time delay in case of power loss is 4 seconds – quick reaction to a failure.

Design and parameters

The device has been designed with simplicity of operation and reliability in mind. The lack of detachable terminals ensures the durability of electrical connections. Built-in phase asymmetry control and the lack of overvoltage or phase sequence control functions allow you to focus on the basic function – protection against phase failure. Solid construction and precise workmanship guarantee a long service life even in difficult working conditions.