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Three phase voltage monitoring relay

RS-MV31M~37M
Microcontroller based.
True RMS measurement
Select 3phase 3wire or 3phase 4wire mode by a knob.
N phase failure protection for 3phase 4 wire
1NO+1NC output-8A
LED indication for supply and output state
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. User can select three phase three wire or three phase four wire mode as required

Technical data


Modes

3Phase 3wire

3Phase 4wire

Supply terminals

L1,L2,L3

L1,L2,L3,N

Supply voltage

380V/400V/415V

220V/230V/240V

Operating voltage range

266V-540V

154V-312V

U> setting value

(105%-125%)×Un

U< setting value

(75%-95%)×Un

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

Hysteresis

2%fixed

Trip time for incorrect phase sequence and phase failure

<0.5s

Delay error

±10%+0.1s

Knob setting error

1% x scale value

Rated insulation voltage

415V

Output contacts

1NO+1NC

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 RailEN60715)


Models

U>

U<

Phase failure

Phase sequence

Asymmetry

RS-MV31M

 

 

 

RS-MV32M

 

 

RS-MV33M

 

 

RS-MV34M

 

 

RS-MV35M

 

 

RS-MV36M

 

RS-MV37M


Front-face panel



Function diagrams



Wiring diagrams