Crouzet 84873222, 84873220, 84873221 Data Sheet

Phase control

M3US

H3US

H3USN

Part numbers

Product adaptations

Accessories

General characteristics

➜ 3-phase voltage control relay - 17.5 mm / 35 mm

■ 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

M3US H3US H3USN

Function Under/overvoltage

Nominal voltage (V)
Output 1 single pole changeover

Part numbers

between phases

3 x 208

➞ 3 x 480 V

relay

84873222 84873220 84873221

Under/overvoltage
between phases

a

3 x 220 ➞ 3 x 480 V
2 single changeover

relays / one per threshold

Over and undervoltage
between phases and
neutral / loss of neutral

a

3 x 120 ➞ 3 x 277 V
2 single changeover

relays / one per threshold

a

■ 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

Description Code

Removable sealable cover for 17.5 mm casing 84800000
Removable sealable cover for 35 mm casing 84800001

M3US H3US H3USN

Supply

Supply voltage Un
Voltage supply tolerance -12% / +10% -12% / +10% -20% / +20%

Operating range
Power consumption at Un

Inputs and measuring cicuit

Selection of phase-phase nominal voltage Un 208-220-380-400-415-

Selection of phase-neutral voltage - - 120-127-220-230-240-260-277

Output

Electrical life (number of operations)

General characteristics

Casing 17.5 mm 35 mm 35 mm
Weight 80 g 130 g 130 g

Comments

3 x 208

➞ 3 x 480 V

183

➞ 528 V

1.8 VA in

440-480 V

1 x 10

* 3-phase mains with earth * 3-phase mains with earth * 3-phase mains with earth

a

a

5

a

a

* 3 x 220 ➞ 3 x 480 V a * 3 x120 ➞ 3 x 277 V a *

194 ➞ 528 V

2.9 VA in

220-380-400-415-440­480 V

1 x 10

a

a

a

4

96 ➞ 332 V

3.9 VA in

-

1 x 10

a

a

4

26

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General characteristics

Supply

a

supply voltage frequency

Galvanic isolation of power supply/measurement No

Inputs and measuring cicuit

Frequency of measured signal 50
Max. measuring cycle time 150 ms/True RMS measurement
Voltage threshold adjustment

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 threshold crossing 0.3
Repetition accuracy with constant parameters ± 3%
Reset time 1500 ms
Delay on pick-up 500 ms
Alarm on delay time max. 200 ms

Output

Type of contacts No cadmium
Maximum breaking voltage

Max. breaking current
Min. breaking current
Breaking capacity (resistive)
Maximum rate 360 operations/hour at full load

Operating categories acc. to IEC 60947-5-1 AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
Mechanical life (operations)

Insulation

Nominal insulation voltage IEC 60664-1 400 V
Insulation coordination (IEC 60664-1 / 60255-5) Overvoltage category III: degree of pollution 3
Rated impulse withstand voltage IEC 60664-1/60255-5 4 KV (1.2 / 50 µs)
Dielectric strength IEC 60664-1/60255-5 2 kV AC 50 Hz 1 min
Insulation resistance IEC 60664-1 / 60255-5

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 60695-2-11 & NF EN 60695-2-11
Protection (IEC 60529) Terminal block: IP 20

Connecting capacity IEC 60947-1

Max. tightening torques IEC 60947-1 0.6
Operating temperature IEC 60068-2 -20
Storage temperature IEC 60068-2 -40
Humidity IEC 60068-2-30 2 x 24 hr cycle 95% RH max. without condensation 55°C
Vibrations according to IEC/EN60068-2-6 10
Shocks IEC 60068-2-6 5 g

Standards

Marking CE (LVD) 73/23/EEC - EMC 89/336/EEC
Product standard NF EN 60255-6 / CEI 60255-6 / UL 508 / CSA C22.2 N°14
Electromagnetic compatibility Immunity EN 61000-6-2/IEC 61000-6-2

Certifications UL, CSA, GL

Conformity with environmental directives RoHS, WEEE

50 / 60 Hz ±10%

➞ 60 Hz ± 10%

b

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)

b

Overvoltage 2➞ 20% of selected Un
For M3US and H3US:

(+2

➞ +10% across the 3 x 480 V

➞ 30 s (0, +10%)

z

250 V

z

5 A
10 mA / 5 V
1250 VA

30 x 10

> 500 MΩ / 500 V

Casing: IP30
Rigid: 1 x 4

1 x 11 AWG - 2 x 14 AWG
Flexible with ferrules: 1 x 2.5
1 x 14 AWG - 2 x 16 AWG

➞ 150 Hz, A = 0.035 mm

Emission EN 61000-6-4/EN 61000-6-3
IEC 61000-6-4/IEC 61000-6-3
Emission EN 55022 class B

c

a

6

c

2

- 2 x 2.52 mm2

➞ 1 Nm / 5.3 ➞ 8.8 Lbf.Ft
➞ +50°C
➞ +70°C

a

range)

2

- 2 x 1.52 mm

pending

2

27

Overview

Phase control

Principles

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.

M3US - Under/Overvoltage Operating principle

1

L1
L2

2

L3

3
4

5

6 6

Overvoltage

B

Hysteresis

C

Undervoltage

D

Phases L1, L2, L3

E

Relay

F

Over and undervoltage threshold delay

G

H3US - H3USN - Under/Overvoltage Operating principle

1

L1
L2

2

L3

3

4
5

6

7 8

Overvoltage

B

Hysteresis

C

Undervoltage

D

Phases L1, L2, L3

E

Relay R1

F

Relay R2

G

Overvoltage threshold delay

H

Undervoltage threshold delay

I

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
17% to -2% for the 3 x 220 V

- Overvoltage, adjustable from +2
maximum voltage 528 V

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.

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
the minimum voltage 194 V

- Overvoltage, adjustable from + 2 to +20% (+2 to +10% over the 3 x 480 V
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.

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%.
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.

a

range due to the minimum voltage 183 V a)

a

a

➞ +20% (+2 ➞ +10% over the 3 x 480 V

).

a

)

).

a

range and -

a

range due to the

a

range due to

a

range due to the

28

Dimensions (mm)

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M3US

60

3,5

45

67,5

Connections

M3US

L1

L2

L3

1

F1

L1 L2RL3

L2

L3

L1

12

1112 14

100 mA fast-blow fuse or cut-out

B

H3US

H3US - H3USN

44

23,2

5,5

17,5

3,5

90

2,6

67,5

45

60

44

23,2

5,5

35

90

2,6

H3US - H3USN

– KM1

11

14

U1

V1

W1

M1

3

L1

L2

L3

1

F1

L1 L2

L2

L3

L1

12

1112 14

22 21 24

100 mA fast-blow fuse or cut-out

B

11

R1 R2

22

14

– KM1

L3

21

24

U1

W1

V1

M1

3

L1

L2

L3

N

1

F1

L1 L2

L2

L3

(N)

L1

12

1112 14

22 21 24

100 mA fast-blow fuse or cut-out

B

L3

11

R1 R2

22

14

W1

U1

V1

M1

3

– KM1

(N)

21

24

29