Monitoring relay RPN-1VFR-A400 864373

Relay for comprehensive electrical network monitoring

The RPN-1VFR-A400 monitoring relay is a reliable device designed to monitor the voltage status in three-phase power networks (3(N) - 400/230 V). Its construction based on proven Relpol solutions ensures effective protection of the electrical installation and connected receivers. This relay is particularly useful in applications requiring continuous power supply and rapid detection of potential problems.

Functions and application

RPN-1VFR-A400 performs key monitoring functions: LOST D (phase failure monitoring), ASYM D (phase asymmetry monitoring) and SEQ D (phase sequence monitoring). Therefore, in the event of irregularities such as loss of one phase, uneven load or incorrect phase sequence, the relay reacts immediately, signaling the problem and enabling quick intervention. The use of this type of relay minimizes the risk of equipment damage and downtime.

The relay finds application in:

• Protection of electric motors against power supply irregularities.
• Monitoring the quality of voltage in industrial and commercial installations.
• Automation and control systems where stable power supply is crucial.
• Protection of sensitive electronic devices against damage caused by voltage fluctuations.

Characteristics and construction

The device is characterized by a universal supply voltage, which is equal to the monitored voltage, which simplifies installation and configuration. It has one changeover contact, which can be used to signal an alarm or disconnect the load. The overload capacity exceeding 1.2 Un ensures reliable operation even with short-term voltage surges – the relay tolerates the starting of devices with a motor well. DIN 35 mm rail mounting simplifies integration with existing electrical infrastructure. Compact dimensions (17.5x90x64.6mm) allow installation in a limited space. Additionally, the asymmetry range has been set at 55V, which ensures precise detection of phase imbalance problems. The relay has a contact delay of 4 seconds, which helps to avoid false alarms caused by temporary disturbances.