3-phase voltage control relay - 17.5 mm / 35 mm H3US Part number 84873220
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
Type
84873220
H3US
Function
Under/overvoltage between phases
Nominal voltage (V)
3 x 220 →3 x 480 V AC
Output
2 single changeover relays / one per threshold
Specifications
Supply
AC supply voltage frequency
Galvanic isolation of power supply/measurement
50 / 60 Hz ±10 %
No
Inputs and measuring circuit
Frequency of measured signal
Max. measuring cycle time
Voltage threshold adjustment
50 →60 Hz ±
10 %
150 ms/True RMS measurement
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)
2 % of Un (M3US, H3US)
± 3 % of the displayed value
± 0,5 %
< 1 % across the whole range
0,05 % / °C
Fixed hysteresis
Display precision
Repetition accuracy with constant parameters
Measuring error with voltage drift
Measuring error with temperature drift
Timing
Delay on thresold crossing Tt
Repetition accuracy with constant parameters
Reset time
Alarm on delay time max.
0,3 →30 s (0, +10 %)
±3%
1500 ms
200 ms
Output
Type of contacts
Maximum breaking voltage
Max. breaking current
Min. breaking current
Breaking capacity (resistive)
Maximum rate
Operating categories acc. to IEC/EN 60947-5-1
Mechanical life (operations)
No cadmium
250 V AC/DC
5 A AC/DC
10 mA / 5 V DC
1250 VA AC
360 operations/hour at full load
AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
30 x 10
6
Insulation
Nominal insulation voltage IEC/EN 60664-1
Insulation coordination (IEC/EN 60664-1)
Rated impulse withstand voltage (IEC/EN 60664-1)
Dielectric strength (IEC/EN 60664-1)
Insulation resistance (IEC/EN 60664-1)
400 V
Overvoltage category III : degree of pollution 3
4 KV (1,2 / 50
μs)
2 kV AC 50 Hz 1 min
> 500 MΩ / 500 VDC
General characteristics
Display power supply
Display relay
Mounting
Mounting position
Material : enclosure plastic type VO to UL94 standard
Protection (IEC/EN 60529)
Green LED
Yellow LED (1 for M3US, 2 for H3US and H3USN)
On 35 mm symmetrical DIN rail, IEC/EN 60715
All positions
Incandescent wire test according to IEC/EN 60695-2-11
Terminal block : IP 20
Casing : IP30
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
26/02/2014
Connecting capacity IEC/EN 60947-1
Rigid : 1 x 4 - 2 x 2.5 mm
1 x 11 AWG - 2 x 14 AWG
2
2
2
www.crouzet.com
Flexible with ferrules : 1 x 2.5
2
- 2 x 1.5
2
mm
2
1 x 14 AWG - 2 x 16 AWG
0,6 →1 Nm
/ 5,3 →8,8 Lbf.Ft
-20 →+50 °C
-40 →+70 °C
2 x 24 hr cycle 95 % RH max. without condensation 55 °C
10 →150 Hz, A = 0.035 mm
5g
Max. tightening torques IEC/EN 60947-1
Operating temperature IEC/EN 60068-2
Storage temperature IEC/EN 60068-2
Humidity IEC/EN 60068-2-30
Vibrations according to IEC/EN60068-2-6
Shocks IEC/EN 60068-2-6
Standards
Standards
Certifications
Conformity with environmental directives
IEC/EN 50178, IEC/EN 61000-6-2, IEC/EN 61000-6-3
CE, UL, CSA, GL
RoHS, WEEE
Supply
Supply voltage Un
Voltage supply tolerance
Operating range
Power consumption at Un
3 x 220 →3 x 480 V AC *
-12 % / +10 %
194 →528 V AC
22 VA in 400 VAC, 50 Hz
Inputs and measuring circuit
Selection of phase-phase nominal voltage Un
Selection of phase-neutral voltage
220-380-400-415-440-480 V AC
-
Timing
Delay on pick-up
≤ 650 ms
1 x 10
4
Output
Electrical life (number of operations)
General characteristics
Casing
Weight
35 mm
130 g
Comments
Accessories
Description
Removable sealable cover for 35 mm casing
Code
84800001
Principles
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.
Principles
H3US - H3USN - Under/Overvoltage
Operating principle
H3US
The relay monitors its own supply voltage.
It controls :
- Undervoltage, adjustable from - 2 to - 20 % of Un (-2 to -12 % over the 3 x 220 V AC range due to the minimum voltage 194 V AC)
- Overvoltage, adjustable from + 2 to +20 % (+2 to +10 % over the 3 x 480 V AC range due to the maximum voltage 528 V AC).
Each threshold has its own time delay with independent setting between 0.3 and 30 s.
In the event of a voltage fault, the corresponding relay (one undervoltage output/one overvoltage output) opens at the end of the time delay set by the user.
In the event of phase failure, both relays open instantaneously, without waiting for the end of the time delay. The two relay LEDs go out.
H3USN
The relay monitors its own supply voltage.
It controls :
- Presence of the neutral,
- Undervoltage, adjustable from -2 to -20 % of Un,
- Overvoltage, adjustable from +2 to +20 %.
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
26/02/2014
www.crouzet.com
Each threshold has its own time delay with independent setting between 0.3 and 30 s.
In the event of a voltage fault, the corresponding relay (one undervoltage output/one overvoltage output) opens at the end of the time delay set by the user.
If neutral is lost, both relays open instantaneously and the corresponding LED is extinguished, without waiting for the end of the time delay. The two relay LEDs are extinguished.
N
o
Legend
Overvoltage
Hysteresis
Undervoltage
Phases L1, L2, L3
Relay R1
Relay R2
Overvoltage threshold delay
Undervoltage threshold delay
Dimensions (mm)
H3US - H3USN
mm
Connections
H3US
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
26/02/2014
N
o
Legend
100 mA fast-blow fuse or cut-out
www.crouzet.com
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
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