Voltage and phase loss sensor CZF contact: 1NO, I=10A, hermetic enclosure, connection cable

Electric motor protection – phase failure and asymmetry sensor

This phase failure sensor is a reliable protection for electric motors powered by a three-phase network. Its function is to detect voltage loss in one or more phases and voltage asymmetry, which can lead to motor damage. The device reacts to these irregularities by disconnecting the motor and preventing more serious failures.

CZF is a compact device designed for mounting in a hermetic enclosure, which ensures its resistance to environmental conditions. It has a built-in connection cable, which simplifies installation and reduces start-up time. A 1Z (1NO) contact allows easy integration with existing control systems.

Functionality and application

This sensor not only protects the motor against the effects of phase failure but also monitors voltage asymmetry. Voltage asymmetry between phases can cause the motor windings to overheat and shorten its lifespan. By quickly detecting these problems, the sensor helps avoid costly downtime and repairs.

• Protection against phase failure: Disconnects the motor in case of voltage loss in one or more phases.
• Voltage asymmetry control: Reacts to uneven voltages between phases, preventing motor overheating.
• Adjustable time delay: A minimum time delay of 4 seconds eliminates the risk of accidental motor shutdown during momentary voltage drops.
• Hermetic enclosure: Ensures safe operation in harsh industrial conditions.
• Easy installation: Built-in connection cable simplifies installation.

The device is ideal for use in industry, workshops, construction and anywhere where reliable protection of electric motors is required. Using the sensor increases work safety and extends the life of connected devices.

Technical characteristics and operating parameters

CZF is characterized by a voltage measurement range from 140 to 270 V and a maximum load current of 10 A. It does not require an external power source, which simplifies installation and reduces operating costs. It is worth paying attention to the precise control of voltage asymmetry – activation occurs when the voltage difference exceeds 45V~ with a hysteresis of 5V~. Thanks to this, the sensor works effectively and reliably in various network conditions. The device has a connection with a soldering terminal, which ensures a stable electrical connection. The height of the device is 90 mm and the depth is 65 mm, which allows mounting in a limited space.