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

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)