RS-MV31N~37N-3phase-4wire

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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
Features
  • 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
Front Panel
Wiring Diagram
Function Diagram
Models
Model

RS-MV31N~37N-3phase-4wire

Supply Terminals

L1,L2,L3,N

Supply Voltage

220V/230V/240V

Operation Voltage Range

154V-312V

U> Setting Value

(105%-125%)xUn

U< Setting Value

(75%-95%)xUn

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 Contact

1 C/O

Current Rating

8A/250V AC1

Mechanical Life

10⁶

Electrical Life

10⁵

Protection Degree

IP20

Pollution Degree

3

Altitude

≤2000m

operation temperature (°C)

-20°C~55°C

Permissible Relative Humidity

≤50% at 40°C(without condensation)

Storage temperature(°C)

-30°C~70°C

Wire Size

0.5mm² ~2.5mm²

Torque

0.5Nm

Mounting

TH-35 Rail(EN60715)

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