H3USN

KEY FEATURES

  • 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
FunctionNominal voltage (V)OutputCode
Over and undervoltage between phases and neutral / loss of neutral3 x 120 →3 x 277 V ∿*2 single changeover relays / one per threshold84873221

Specifications


Supply voltage Un 3 x120 →3 x 277 V ∿ *
Voltage supply tolerance -20 % / +20 %
Operating range 96 →332 V ∿
Power consumption at Un 3,9 VA in ∿

Measurement ranges 96 →332 V AC
Selection of phase-phase nominal voltage Un 120-127-220-230-240-260-277
Voltage threshold adjustment Undervoltage -2 →-20 % of selected Un Overvoltage 2 →20 % of selected Un

Type of output 2 single pole changeover relays / one per threshold

Display relay 2 Yellow LED (one per output)
Casing 35 mm
Weight 130 g

* 3-phase mains with earth

∿ supply voltage frequency 50 / 60 Hz ±10 %
Galvanic isolation of power supply/measurement No
Immunity from micro power cuts 20 ms

Frequency of measured signal 50 →60 Hz ±10 %
Max. measuring cycle time 150 ms/True RMS measurement
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

Delay on threshold crossing 0,3 →30 s (0, +10 %)
Repetition accuracy with constant parameters ± 3 %
Reset time 1500 ms
Delay on pick-up 500 ms
Alarm on delay time max. 200 ms

Type of contacts No cadmium
Maximum breaking voltage 250 V ∿/⎓
Max. breaking current 5 A ∿/⎓
Min. breaking current 10 mA / 5 V ⎓
Electrical life (number of operations) 1 x 105
Breaking capacity (resistive) 1250 VA ∿
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

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 μs)
Dielectric strength (IEC/EN 60664-1) 2 kV AC 50 Hz 1 min
Insulation resistance (IEC/EN 60664-1) > 500 MΩ / 500 V⎓

Display power supply Green LED
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
Connecting capacity IEC/EN 60947-1 Rigid : 1 x 42 - 2 x 2.52 mm2 1 x 11 AWG - 2 x 14 AWG Flexible with ferrules : 1 x 2.52 - 2 x 1.52 mm2 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

Product standard IEC/EN 50178
Electromagnetic compatibility (EMC) IEC/EN 61000-6-1, IEC/EN 61000-6-2, IEC/EN 61000-6-3, IEC/EN 61000-6-4
Certifications CE, UL, CSA, GL
Conformity with environmental directives RoHS

Technical sketches

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). 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.

H3US - H3USN - Under/Overvoltage

H3US - H3USN - Under/Overvoltage
Legend
1-
Overvoltage
2-
Hysteresis
3-
Undervoltage
4-
Phases L1, L2, L3
5-
Relay R1
6-
Relay R2
7-
Overvoltage threshold delay
8-
Undervoltage threshold delay
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 range due to the minimum voltage 194 V ∿) - Overvoltage, adjustable from + 2 to +20 %  (+2 to +10 %  over the 3 x 480 V range due to the maximum voltage 528 V ∿). 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. 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 %.  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.

H3US - H3USN

H3US - H3USN

H3USN

H3USN
Legend
1-
100 mA fast-blow fuse or cut-out
PH RMC2 MWS

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