THREE PHASE VOLTAGE MONITORING RELAY RNPP-301

RNPP-301 voltage monitoring relay is designed for protection of three-phase loads against major type of mains faults, as:

• RMS voltage reaching beyond admissible thresholds
• Phase sequence order violation and phase coincidence
• Violation of the mains voltage phase completeness and symmetry

The device performs monitoring the main circuit parameters and de-energizes load when the parameters fall beyond specified boundaries. The relay also tracks the status of magnetic starter power contacts at no-load and under load while monitoring their operability (burning or sticking).