Microprocessor phase failure and asymmetry sensor CZF-BR-TRMS

Intelligent three-phase motor protection – phase loss and asymmetry sensor

This microprocessor-based sensor, designed for DIN rail mounting, is a key element in protecting electric motors powered by a three-phase network. It reacts quickly and effectively to dangerous situations, such as voltage loss in one or more phases, or voltage asymmetry between phases – phenomena that can lead to serious motor damage. The device also monitors phase sequence, preventing incorrect direction of rotation.

Practical benefits for the installer:

• Quick installation: Compact dimensions (2 modules, 35 mm wide) and screw connection facilitate installation on a standard DIN rail.
• Trouble-free configuration: Adjustable voltage asymmetry threshold allows you to adapt the sensor to the specific operating conditions of the installation.
• LED diagnostics: Two LEDs indicate the power status and any alarms, making it easier to quickly identify problems.
• True RMS: True RMS voltage measurement ensures reliable operation even in networks with harmonic disturbances.

Advantages for the end user:

• Investment protection: Protects the motor from costly failures caused by phase loss or voltage asymmetry.
• Work safety: Ensures safe and reliable operation of equipment powered by a three-phase network.
• Long lifespan: Solid construction and high-quality components guarantee long-lasting and trouble-free operation of the device.
• Automatic reset: After the voltage stabilizes, the sensor automatically restores power, minimizing downtime.

CZF-BR-TRMS is a reliable solution for anyone who cares about the safety and efficiency of their electrical equipment. Using this sensor is an investment in peace of mind and avoiding costly downtime associated with motor failures. The device has a changeover contact (1 x NO/NC) with a maximum load of 10A, which allows it to be integrated with existing control and protection systems. The voltage measurement range of 140…270 V makes it compatible with most standard three-phase networks. The time delay before shutdown (4 seconds) eliminates the risk of false alarms caused by short-term voltage drops.