Microprocessor phase failure sensor CZF-334-TRMS

Phase failure sensor with adjustable asymmetry threshold – protection for motors and installations

This microprocessor-controlled phase failure sensor, model number CZF-334-TRMS, is a reliable device designed to protect three-phase powered electric motors. Its main function is to monitor the voltage in each phase and respond to irregularities such as voltage loss, phase asymmetry, or exceeding permissible voltage values. This is crucial for ensuring continuous operation of devices and protecting against damage.

Functionality and application

CZF-334-TRMS is an advanced solution that not only detects power supply problems but also allows for their regulation. Thanks to the adjustable asymmetry threshold, the device's sensitivity can be adapted to the specific operating conditions of the installation. The device is particularly useful in places where power supply stability is critical, and failures can lead to costly downtime. It is used in industry, construction, and automation systems.

Key features and benefits:

• True RMS measurement: Ensures accurate voltage measurement even in the event of disturbances in the power supply network, which translates into reliable device operation.
• Phase asymmetry control: Detects uneven phase loading, which can lead to overheating of motors and shortening their lifespan.
• Adjustable asymmetry threshold: Allows you to adjust the device's sensitivity to specific needs and installation operating conditions.
• Wide voltage range: Supports voltages in the range of 320…480 V, making it a universal solution for different types of installations.
• 2NO/NC isolated contacts: Provide flexibility in connecting to various control and signaling systems.
• No external power supply required: Simplified installation and no additional costs associated with powering the device.
• DIN rail mounting: Facilitates integration with existing electrical infrastructure.

Construction and technical parameters

The device has compact dimensions (width 18 mm, depth 69 mm, height 98 mm) and is mounted on a standard DIN rail. It has a screw connection for easy and secure connection of wires. The used isolated contacts (2NO/NC) allow for the implementation of various control and alarm signaling functions. The minimum time delay for power loss/application is 1 second, and the maximum is 10 and 60 seconds respectively – these parameters can be adjusted for optimal adaptation to a specific application. It is also important that the sensor does not require an external power source, which simplifies its installation and use.