Voltage relay CP-721 with display, programmable single-phase Un=450V+N Imax=30A 2 modules

Intelligent single-phase network protection with relay CP-721

The CP-721 voltage relay is a programmable device designed to monitor and protect single-phase electrical installations. It is used to protect connected receivers from the effects of incorrect voltages – both too high and too low. Thanks to the ability to program the trigger thresholds and reaction times, it can be adapted to the specific requirements of a given circuit and protected devices. This is an ideal solution for both installers and end-users looking for reliable protection.

Functionality and flexibility in one device

CP-721 offers a wide range of settings, including voltage window adjustment (UL and UH thresholds), separate configuration of reaction times for exceeding thresholds, and setting the time to return to normal operation. Equipped with a clear LED segment display, it constantly informs about the current voltage value in the network. The status of the contact is indicated by a red LED, making it easy to quickly identify problems. The device is designed for mounting on a 35 mm rail and occupies 2 modules, ensuring compact dimensions and easy integration with existing infrastructure.

Key features:

• Programmability: Allows precise adjustment of operating parameters to specific application needs. Possibility to set the lower (UL) and upper (UH) voltage threshold and the reaction time to exceed these thresholds.
• Wide voltage range: Supports supply voltages in the range of 150÷450 V AC, making it a universal solution for various installations.
• Multifunctionality: Provides overvoltage and undervoltage control, protecting devices from damage caused by voltage fluctuations.
• Durability and reliability: Made of high-quality components, guarantees long-lasting and trouble-free operation.
• Clear display: Allows continuous monitoring of the voltage value in the network, making it easier to diagnose any problems.
• Application in installations with generator sets: The relay works with generator sets, providing a stable power supply to connected devices.
• Screw terminals: Ensure a secure connection of wires with a cross-section of up to 4.0 mm².

Technical specifications and applications

The CP-721 relay finds application in a wide spectrum of electrical installations, such as:

• Protection of home electrical installations against overvoltages and voltage drops.
• Protection of sensitive electronic devices (computers, televisions, audio-video equipment).
• Voltage control in home automation systems.
• Protection of electric motors against damage caused by incorrect supply voltage.
• Application in uninterruptible power supply (UPS) systems.

The device has one normally open contact with a load capacity of 2 x 8 A (AC-1) and provides galvanic isolation of the contact for increased safety. The minimum adjustable time delay in case of power failure is 0.1 s and the maximum is 10 s. Setting accuracy is 1V and measurement accuracy is ±1V.