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Voltage monitoring relay 900VPR-2
Technical data
Order overview
Voltage monitoring relay 900VPR-2


Digital voltage monitoring relay with LCD display form selec. Controls one or three pase voltage with or without neutral.
Monitors overvoltage, undervoltage, overfrequency, underfrequency, phase asymmetry, phase failure and phase sequence. RMS measurement.
Easy setting with three front push buttons with sealable cover. Slim space saving design, only 35mm wide. 35mm DIN Rail mount.


Please click on the image for a larger view

Massbild VPRA2M

Technical data

Liquid Crystal Display3 digits
MeasurementsUnder voltage, over voltage, under frequency, over frequency, phase asymmetry, phase failure and phase sequence
Time SettingPower ON delay, trip time delay and recovery time delay
Alarm indicationsTrip
ResetAuto / manual
Electrical connection3 or 4 wire
Supply voltageSelf powered
Operating Range (L-N)160 - 300VAC
Operating Range (L-L)280 - 520VAC
Power consumption30VA max
Frequency45 - 65Hz
Measuring range RMS (L-N)0 - 300VAC
Measuring range RMS (L-L)0 - 520VAC
Trip setting under voltage 3 wire280 -520VAC (L-L)
Trip setting under voltage 4 wire160 -300VAC (L-N)
Trip setting over voltage 3 wire280 -520VAC (L-L)
Trip setting over voltage 4 wire160 -300VAC (L-N)
Under frequency45 - 65Hz
Over frequency45 - 65Hz
Phase failureYes
Phase sequenceYes
Trip setting asymmetry5 - 99.9%
Power ON delay2-99.9s
Trip time delay0 - 99.9s
Recovery time delay0 - 99.9s
Response time<200ms
Hysteresis voltage1 - 99.9V
Hysteresis frequency0.2 - 2Hz
Hysteresis asymmetry2 - 20%
Resolution voltage1V
Resolution frequency0.1Hz
Accuracy voltage setting±1%
Accuracy frequency setting±0.3Hz
Accuracy time setting±5% of setting + 200ms
Contact2 SPDT (2 C/O)
Relay rating NO5A @ 250V AC
Relay rating NC3A @ 250V AC
Environmental Specifications
Operating temperature:0 - 55 C
Storage temperature-20 - 70 C
Humidity95% rF (non-condensing)
Pollution degree2
Mechanical specifications
Dimensions wxhxd35 x 90 x 70.5mm
Mounting35mm DIN rail
Protection degree terminalsIP20
Protection degree housingIP30
Protection degree faceplateIP50
Standards EMC
Electromagnetic compatibilityIEC61326-1 (2005-12)
ESD ImmunityIEC61000-4-2, level 3
Surge immunity:IEC61000-4-5 +/- 2kV common mode, +/- 1kV differential mode
Radiated SusceptibilityIEC 61000-4-3 level 3, 80 - 1000MHz
Leitungsgebundene StörfestigkeitIEC61000-4-6, Level 2
Conducted susceptibility:IEC61000-4-11, level 3
Conducted emissionsCISPR11 & IEC 61000-6-3
Radiated emissionsCISPR22
Electrical fast transients (EFT)IEC61000-4-4, Level 3


Please click on the drewing for a larger view



Please click on the drawing for a larger view

Massbild 900VPR-2

Order overview

Order numberDesignationAppendageStock*1Price*2
900VPR-2Spannungsüberwachungsrelais280-520VAC / 160-300VAC / 2x UM470.15 CHF
*1: Stock levels are for reference only. The handout is done upon incoming orders.
*2: Prices are uncommitted, errors are excepted.