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

Specifications

Type

Function

Nominal voltage (V)

Output

84873220

H3US

Under/overvoltage between phases

3 x 220 →3 x 480 V AC

2 single changeover relays / one per threshold

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 10

6

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

μs)

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

26/02/2014

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