Voltage relay CP-730

Three-phase voltage monitoring – reliable protection for your installation

The CP-730 voltage relay is a device designed to monitor voltage in three-phase networks. Its main task is to protect connected receivers from the effects of incorrect power supply parameters, such as overvoltage or undervoltage. This is a key solution for both installers who want to ensure safe and stable system operation, and for end-users who value reliability and protection of their devices.

Functionality and application

This device not only monitors voltage but also has a built-in time delay. This means that after detecting a voltage problem, the relay will not switch on again immediately after it stabilizes. This prevents frequent switching on and off of connected devices, which extends their lifespan and minimizes the risk of damage. The CP-730 is particularly useful in places with an unstable power supply, where frequent voltage fluctuations pose a real threat to sensitive electronic devices. It can be used in residential, commercial and industrial facilities.

Key features and benefits:

• Wide power supply voltage range: The relay operates in the range of 3×(50÷450V)+N, making it a universal solution for various installations.
• Three-phase monitoring: Monitors all three phases simultaneously, providing comprehensive system protection.
• Adjustable operating thresholds: The ability to set the lower (U1: 150÷210V) and upper (U2: 230÷260V) voltage threshold allows you to adapt the device to the specific requirements of the installation.
• Time delay: Prevents frequent switching on and off of receivers during unstable power supply (lockout for 10 minutes with >10 voltage changes per minute).
• LED indicators: Inform about the operating status of the relay and the detection of exceeding voltage thresholds (red U1/U2 diode).
• TH-35 rail mounting: Enables quick and easy mounting in the electrical switchboard (width 3 modules – 52.5 mm).
• Screw terminals: Ensure a secure connection of wires (4.0 mm²).
• No external power supply required: The device draws power directly from the monitored network.

Thanks to these features, the CP-730 is a reliable tool for protecting against the effects of incorrect voltage, increasing safety and extending the life of connected devices. In addition, its compact size makes it easy to integrate with existing electrical infrastructure.