Phase failure and asymmetry sensor CZF-312 Un=3x400V+N Io<2x5A TH-35 rail mounting, adjustable operating voltage, instantaneous action

Three-phase network monitoring and device protection

The CZF-312 is a reliable phase failure and asymmetry sensor designed to monitor the correctness of voltages in three-phase networks. Its task is to protect connected devices from the effects of voltage drops, uneven loading of individual phases, or complete failure of one of the phases. This is a key solution for ensuring continuity of operation and protecting valuable machinery.

Functionality and application

The device reacts to voltage irregularities, allowing for quick detection of potential problems in the electrical installation. This makes it possible to avoid damage to equipment, production downtime, or system failures. The sensor finds application in both industrial installations and commercial buildings, as well as homes with more complex electrical installations. Installation is done on a standard TH-35 rail, which facilitates integration with existing infrastructure.

Characteristics and benefits

• Phase failure detection: Quickly identifies the loss of one phase, protecting devices from operating in incorrect conditions.
• Phase asymmetry control: Monitors the evenness of the load on individual phases, preventing overheating of wires and damage to motors.
• Adjustable operating voltage: Allows you to adjust the sensor's sensitivity to the specific operating conditions of the installation (range 140…270 V).
• Instantaneous response time: Ensures an immediate reaction to detected irregularities, minimizing the risk of damage.
• Durable construction: The housing with dimensions of 90 x 65 mm ensures durability and resistance to environmental conditions.
• Easy installation: Mounting on a TH-35 rail simplifies installation and integration with existing electrical infrastructure.
• Screw connection: Provides a secure and reliable connection of electrical wires.
• No external power supply required: The sensor draws power directly from the monitored network, simplifying installation.
• Switching contacts: Has one normally closed contact and one normally open contact, allowing connection to control circuits or alarm signaling systems.

The minimum time delay in case of power failure is 4 seconds, and the maximum is also 4 seconds. The rated current of the contacts is 2 x 5 A, and the voltage measurement range is between 140 and 270 V.

The CZF-312 is a solid and precise tool for protecting electrical installations from the effects of irregularities in the network voltage – an investment in safety and the reliable operation of connected devices.