Relpol RPN-1VFS-A400 3-Phase Monitoring Relay 3(N) 1P 400/230V AC 50/60 Hz

The Relpol RPN-1VFS-A400 is a professional 3-phase monitoring relay engineered for industrial and electrical control systems. This device is specifically designed to monitor phase parameters in 3(N) 400/230V AC power networks operating at 50/60 Hz. By continuously tracking voltage levels, it provides essential protection for sensitive electrical equipment against irregularities such as phase loss or voltage fluctuations, ensuring the overall stability and safety of complex power distribution infrastructures.

Advantages

The primary benefit of this monitoring relay is its high reliability in maintaining operational continuity within electrical systems. Its robust design allows for precise detection of power supply deviations, which helps prevent potential damage to connected machinery and control components. The device is built to meet demanding industrial standards, offering a compact solution that integrates seamlessly into standard control panels while providing consistent performance in various environmental conditions.

Suitable for

• Industrial automation and control systems
• Power distribution networks
• Protection of three-phase motors and electrical equipment
• Monitoring of phase sequence and voltage stability

This relay may not be suitable for applications requiring DC voltage monitoring or systems operating outside the specified 400/230V AC voltage range. It is also not intended for use in high-current power switching applications where a dedicated contactor or circuit breaker would be required to handle the primary load.

Key specifications

• Voltage range: 3(N) 400/230V AC
• Frequency: 50/60 Hz
• Output configuration: 1P (single pole)
• Application: 3-phase monitoring

Installation should be performed by qualified personnel in accordance with local electrical regulations. The relay is typically mounted on a standard DIN rail within a control cabinet. Ensure that the input terminals are correctly wired to the phase and neutral lines as indicated on the device housing. Once connected, the relay automatically begins monitoring the supply parameters, with status indicators providing visual feedback on the operational state of the network.

What to consider before purchase

• Verify that your network voltage matches the 400/230V AC specification
• Ensure the relay is compatible with your existing control panel layout
• Confirm that the 1P output configuration meets your system's switching requirements

Regularly inspect the relay and its terminal connections to ensure they remain secure and free from oxidation, and verify that the monitoring functions are correctly triggering during scheduled maintenance intervals.