3
-
phase voltage control relay
-
17.5 mm / 35 mm M3US Part number 84873222
H3US and M3US relays control, on 3-phase networks :
- overvoltage between phases,
- undervoltage between phases
The H3USN relay controls, on 3-phase networks :
- overvoltage between phases and neutral,
- undervoltage between phases and neutral,
- loss of neutral
Multi
-voltage Products
Controls its own supply voltage
True RMS measurement
LED status indication
Part numbers
Specifications
Type
Function
Nominal voltage (V)
Output
M3US
Under/overvoltage between phases
3x208→3x480VAC
1 single pole changeover relay
Supply
AC supply voltage frequency
50 / 60 Hz
±
10 %
Galvanic isolation of power supply/measurement
No
Inputs and measuring circuit
Frequency of measured signal
50→60Hz
±
10 %
Max. measuring cycle time
150 ms/True RMS measurement
Voltage threshold adjustment
Undervoltage
-2 to -20 % of selected Un
for M3US :
(-2 to -12 % across the 3 x 208 V range)
(-2 to -17 % across the 3 x 220 V range)
for H3US :
(-2 to -12 % across the 3 x 220 V range)
Overvoltage2→20%ofselectedUn
For M3US and H3US :
(+2→+10%acrossthe3x480VACrange)
Fixed hysteresis
2 % of Un (M3US, H3US)
Display precision
±
3 % of the displayed value
Repetition accuracy with constant parameters
±
0,5 %
Measuring error with voltage drift
< 1 % across the whole range
Measuring error with temperature drift
0,05 % / °C
Timing
Delay on thresold crossing Tt
0,3→30s(0,+10%)
Repetition accuracy with constant parameters
±
3 %
Reset time
1500 ms
Alarm on delay time max.
200 ms
Output
Type of contacts
No cadmium
Maximum breaking voltage
250 V AC/DC
Max. breaking current
5 A
AC/DC
Min. breaking current
10 mA / 5 V DC
Breaking capacity (resistive)
1250 VA AC
Maximum rate
360 operations/hour at full load
Operating categories acc. to IEC/EN 60947
-5-1
AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
Mechanical life (operations)
30 x 106
Insulation
Nominal insulation voltage IEC/EN 60664
-1
400 V
Insulation coordination (IEC/EN 60664
-1)
Overvoltage category III : degree of pollution 3
Rated impulse withstand voltage (IEC/EN 60664
-1)
4 KV (1,2 / 50
μ
s)
Dielectric strength (IEC/EN 60664
-1)
2 kV AC 50 Hz 1 min
Insulation resistance (IEC/EN 60664
-1)
> 500 M
Ω
/
500 VDC
General characteristics
Display power supply
Green LED
Display relay
Yellow LED (1 for M3US, 2 for H3US and H3USN)
Mounting
On 35 mm symmetrical DIN rail, IEC/EN 60715
Mounting position
All positions
Material : enclosure plastic type VO to UL94 standard
Incandescent wire test according to IEC/EN 60695-2-11
Protection (IEC/EN 60529)
Terminal block : IP 20
Casing : IP30
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
Accessories
Overview
3-phase voltage controllers which monitor :
- Undervoltage, adjustable from -20 to -2 % of Un
- Overvoltage, adjustable from 2 to 20 % of Un
- Presence of the neutral (H3USN only)
Measurements are taken between Phases for the H3US -
M3US and between Phases and Neutral for the H3USN
Faults are signalled via LEDs, distinguishing the origin of the fault (one LED for the upper threshold, one LED for the lower threshold).
Voltage selector switch : Set the selector switch to the 3-phase network voltage Un.
The position of this selector switch is only taken into account when the unit is powered up.
If the switch position changes while the unit is operating, all the LEDs flash but the product continues to work normally with the voltage selected on energisation prior to the change of position.
The LEDs return to their normal state if the switch is reset to its initial position defined before the last energisation.
Connecting capacity IEC/EN 60947
-1
Rigid : 1 x 4
2 - 2 x 2.52
mm
2
1 x 11 AWG - 2 x 14 AWG
Flexible with ferrules : 1 x 2.52 - 2 x 1.52
mm
2
1 x 14 AWG - 2 x 16 AWG
Max. tightening torques
IEC/EN 60947
-1
0,6→1Nm
/5,3→8,8Lbf.Ft
Operating temperature IEC/EN 60068
-2
-
20→+50°C
Storage temperature IEC/EN 60068
-2
-
40→+70°C
Humidity IEC/EN 60068
-2-30
2 x 24 hr cycle 95 % RH max. without condensation 55 °C
Vibrations according to IEC/EN60068
-2-6
10→150Hz,A=0.035mm
Shocks IEC/EN 60068
-2-6
5 g
Standards
Standards
IEC/EN 50178, IEC/EN 61000
-6-
2, IEC/EN 61000
-6-3
Certifications
CE, UL, CSA, GL
Conformity with environmental directives
RoHS, WEEE
Supply
Supply voltage Un
3x208→3x480VAC*
Voltage supply tolerance
-12 % / +10 %
Operating range
183→528VAC
Power consumption at Un
22 VA in 400 VAC, 50 Hz
Inputs and measuring circuit
Selection of phase-
phase nominal voltage Un
208-220-380-400-415-440-480 V AC
Selection of phase-neutral voltage
-
Timing
Delay on pick
-up
≤650ms
Output
Electrical life (number of operations)
1 x 105
General characteristics
Casing
17,5 mm
Weight
80 g
Comments
Description
Code
Removable sealable cover for 17.5 mm casing
84800000
Principles
Principles
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
Operating principle
M3US
The relay monitors its own supply voltage. It controls :
- Undervoltage, adjustable from -20 to -2 % of Un (-12 to -2 % over the 3 x 208 V AC range and -17 % to -2 % for the 3 x 220 V AC range due to the minimum voltage 183 V AC)
-Overvoltage,adjustablefrom+2→+20%(+2→+10%overthe3x480VACrangeduetothemaximumvoltage528VAC).
An adjustable time delay from 0.3 to 30s can be used to disable the output relay during a transient fault.
In the event of a voltage fault, the relay opens at the end of the time delay set by the user.
In the event of phase failure, the relay opens instantaneously, without waiting for the end of the time delay.
When the unit is powered up with a measured fault, the relay stays open.
mm
N
o
Legend
Overvoltage
Hysteresis
Undervoltage
Phases L1, L2, L3
Relay
Over and undervoltage threshold delay
Dimensions (mm)
M3US
Connections
M3US
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
N
o
Legend
100 mA fast-blow fuse or cut-out
Product adaptations
Customisable colours and labels
Single voltage in the generic range
Fixed or adjustable time delay
Adjustable fixed hysteresis
Adaptations dedicated to M3US :
Fixed threshold in the generic range
Adaptations dedicated to H3US :
Fixed threshold in the generic range
Adaptations dedicated to H3USN :
Fixed overvoltage threshold in the generic range
Fixed undervoltage threshold in the generic range
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
Mouser Electronics
Authorized Distributor
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Crouzet:
84873222