RNPP-302 numeric voltage monitoring relay is designed for protection of three phase loads against major type of mains faults, as:

• RMS voltage reaching beyond admissible thresholds – over and under voltage
• Phase loss or Single phasing
• Phase sequence order violation or reverse phase sequence
• Phase coincidence or shorting of two or more phases
• Phase Imbalance or asymmetry
• Contactor output side monitoring – full phase switching, contactor health

The device performs monitoring the main circuit parameters and de-energizes (trips) load when the parameters fall beyond specified boundaries.

The three digit, seven segment LED display on the relay front panel allows to:

• Continuously indicate the true RMS circuit voltage – phase voltage or line voltage
• Indicate type of occurring fault
• View (visualize) settings of modes and programming parameters

The menu allows the user to make the following settings:

• Mode of voltage indication for each phase
• Mode of the relay reaction to the digital input for remote de-energizing (tripping)
• Type of relay – phase voltage or line voltage
• Method for setting the voltage deviation
• Turn on/off the phase imbalance monitoring
• Turn on/off the phase sequence order monitoring
• Contactor output terminals voltage monitoring
• Type of measured voltage – 220/380 V, 230/400 V, 240/415 V selectable
• The maximum allowable voltage tripping threshold
• The minimum allowable voltage tripping threshold
• Allowable phase imbalance threshold – %
• Automatic reset delay time
• Min voltage de-energize (tripping) delay time
• Max voltage de-energize (tripping) delay time
• Phase imbalance tripping delay time
• Phase loss tripping delay time
• Delay time for tripping upon a digital input (external emergency button input)
• Monitoring of full phase switching of contactor (output side monitoring)

The device is equipped with an additional alarm/annunciation relay with normally open contacts lead out.

Additional Information:

• Item Code: RNPP-302
• Port of Dispatch: New Delhi, India

Digital input to turn ON/OFF the RNPP-302 remotely (emergency stop);

Changeover relay output (NO+NC): 8A 250VAC at cos φ=1 for the operation by the magnetic contactor to commutate any desired power load;

Normally Open relay contact: 8A 250V at cos φ=1 for signalization/annunciation;

Measurement accuracy for tripping thresholds: not exceeding 3V;

Rated phase/line voltage: 220/380V, 230/400V or 240/415V selectable;

Rated power consumption:not exceeding 5W;

Protection degree of the enclosure case: IP40;

Protection degree of terminal block: IP20;

Operational temperature range from – 35 to +55°C and exposed to not more than 90% of relative humidity

Weight not more than 0.3 kg

Mounting: fit the standard 35 mm DIN-rail

Mounting position: arbitrary – as per requirement

RNPP-302 complies with requirements:

IEC 60947-1:2004; ІEC 60947-6-2:1992; CISPR 11:2004; IEC 61000-4-2:2001.