RNPP-316-500 is designed for:

• Do pomiaru wartości skutecznej (TRMS) napięcia liniowego w sieci trójfazowej.
• Monitoring the allowable voltage levels.
• Ensuring correct phase sequence and absence of phase sticking.
• Monitoring phase continuity and voltage symmetry (phase imbalance).
• Disconnecting the load in case of poor network voltage quality.
• Monitoring network voltage after load disconnection and automatically reconnecting the load when voltage parameters are restored.
• Displaying fault conditions during emergencies and indicating voltage presence on each phase.

RNPP-316-500 uses an indirect method for zero monitoring. It provides adjustable parameters, including separate settings for undervoltage and overvoltage thresholds, automatic restart time (AR), and protection delay time.

After the network voltage parameters are restored, the device automatically reconnects the load after the specified AR delay.

Output Configuration:

The device features two groups of independent changeover contacts (1-2-3 and 4-5-6).

In "COLD STATE" (when the device is unpowered or disconnected):

• Contacts 1-2 (4-5) are closed.
• Contacts 2-3 (5-6) are open.
• When the load relay is activated, the load is disconnected by opening the power circuit of the magnetic contactor coil via contacts 2-3 (5-6).

Advantages:

• Easy connection via a magnetic contactor.
• Separate adjustment of undervoltage and overvoltage thresholds.
• Changeover contacts.
• Compact design.

Applications:

• Monitoring phase and line voltages in three-phase networks.
• Protecting three-phase or, in some cases, single-phase equipment from.
• Voltage faults (undervoltage or overvoltage).
• Incorrect phase sequence and phase sticking.
• Phase loss and imbalance.
• Ideal for safeguarding refrigeration and ventilation systems, as well as automatic transfer switch (ATS) cabinets.