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Three phase voltage monitoring relay

RS-MV31P~37P
Microcontroller based
Supply voltage measurement (True RMS)
Overvoltage, undervoltage, phase failure, asymmetry and
phase sequence protection
Protection parameters setting by knobs
10 operating voltage selectable:208V/220V/230V/240V/380V/400V/415V/440V/460V/480V
1 module DIN rail mounting.

Three phase voltagemonitoring relay is used to protect the three-phase electric motors supplied from three-phase mains, against phase failure, incorrect phase sequence,voltage asymmetry, over and under voltage. The rated supply voltage range is from 208-480V selectable.

Technical data


Supply terminals

L1,L2,L3

Rated voltage supply(Un)

208V/220V/230V/240V/380V/400V/415V/440V/460V/480V

Voltage supply range

165-528V

Measuring range

150-552V

U> setting value

adjustable:(105%-125%)xUn; fixed:115%

U< setting value

adjustable:(75%-95%)xUn;fixed:85%

Asymmetry setting

adjustable: 5%~20%;fixed:8%

U> trip delay

adjustable: 0.1 ~10s; fixed:2s

U< trip delay

adjustable: 0.1 ~10s; fixed:2s

Asymmetry trip delay

adjustable: 0.1 ~10s; fixed:2s

Voltage hysteresis

6V

Asymmetry hysteresis

2%

Trip time for incorrect phase sequence and phase failure

<0.5s

Voltage measurement error Delay error

≤1%

Delay error

±10%+0.1s

Knob setting error

1% x scale value

Rated insulation voltage

480V

Output contacts

1C/0

Current rating

8A/250V AC1

Mechanical life

106

Electrical life

105

Protection degree

IP20

Pollution degree

3

Altitude

≤2000m

Operating temperature

-20℃~+55℃

Permissable relative humidity

≤50% at 40℃(without condensation)

Storage temperature

-30℃~70℃

Wire size/Torque

0.5mm2~2.5mm2 /0.5Nm

Mounting

TH-35 Rail(EN60715)

Models

U>

U<

Phase failure

Phase sequence

Asymmetry

Selectable Un

RS-MV31P

 

 

 

 

RS-MV32P

 

 

RS-MV33P

 

 

RS-MV34P

 

 

RS-MV35P

 

 

RS-MV36P

 

RS-MV37P


Front-face panel




Function diagrams



Wiring diagrams