Crouzet 84872120 Data Sheet

Voltage control

HUL

HUH

Part numbers

Product adaptations

Accessories

General characteristics

➜ Multi-function voltage control relay - 35 mm

■ Control of AC and DC voltages

■ Automatic recognition of AC/DC

■ Measurement ranges from 0.2 V to 600 V

■ Choice between under and overvoltage

■ True RMS measurement

■ Selectable latching (memory) function

Functions Under/Overvoltage Under/Overvoltage
Measurement range 0.2 V
Nominal voltage (V)

Part numbers 84872120 84872130

HUL HUH

➞ 60 V 15 V ➞ 600 V

➞ 240 V

z

24 ➞ 240 V

24

z

■ Customisable colours and labels

■ Measuring ranges within the generic limits

■ Fixed threshold in the generic measurement range

■ Fixed or adjustable time delay

■ Adjustable hysteresis

Description Code

Removable sealable cover for 35 mm casing 84800001

HUL HUH

Inputs and measuring cicuit

Measurement range 0.2 V ➞ 60 V

Input resistance E1 - M: 6 Ω

Permanent overload at 25°C E1 - M: 10 V

E1 - M: 0.2
E2 - M: 1
E3 - M: 6 ➞ 60 V

E2 - M: 30 Ω
E3 - M: 180 Ω

E2 - M: 30 V
E3 - M: 150 V

➞ 10 V

➞ 2 V

15 V

➞ 600 V

E1 - M: 15
E2 - M: 30
E3 - M: 60 ➞ 600 V

E1 - M: 150 Ω
E2 - M: 300 Ω
E3 - M: 600 Ω

E1 - M: 250 V
E2 - M: 500 V
E3 - M: 700 V

➞ 150 V
➞ 300 V

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General characteristics

HUL / HUH

Supply

Supply voltage Un

24 V
Voltage supply tolerance -15% / +10%
Operating range

20.4 V

Polarity with DC voltage No

a

supply voltage frequency

Galvanic isolation of power supply/measurement

50 / 60 Hz ±10%

✓

Power consumption at Un 3.5 VA in AC/0.6 W in DC
Immunity from micro power cuts 10 ms

Inputs and measuring cicuit

Frequency of measured signal 0 Hz, 40
Max. measuring cycle time 30 ms/True RMS measurement
Threshold adjustment 10
Adjustable hysteresis 5

➞ 100% of the range

➞ 50% of displayed threshold

Display precision ±10% of full scale
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 0.1

➞ 3 s (0, + 10%)

Repetition accuracy with constant parameters ± 2%
Reset time 1500 ms
Delay on pick-up < 600 ms

Output

Type of output 1 double changeover relay
Type of contacts No cadmium
Maximum breaking voltage

Max. breaking current
Min. breaking current
Electrical life (number of operations)
Breaking capacity (resistive)

250 V

z

5 A

10 mA / 5 V

1 x 10

1250 VA
Maximum rate 360 operations/hour at full load
Operating categories acc. to IEC 60947-5-1 AC12, AC13, AC14, AC15, DC12, DC13, DC14
Mechanical life (operations)

30 x 10

Insulation

Nominal insulation voltage IEC 60664-1 250 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

> 500 MΩ / 500 V

General characteristics

Display power supply Green LED
Display relay Yellow LED
Casing 35 mm
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

Casing: IP 30
Weight 130 g
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

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

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

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

➞ 150 Hz, A = 0.035 mm

Shocks IEC 60068-2-6 5 g

Standards

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

Certifications UL, CSA, GL

Emission EN 61000-6-4/EN 61000-6-3

IEC 61000-6-4/IEC 61000-6-3

Emission EN 55022 class B

pending
Conformity with environmental directives RoHS, WEEE

➞ 240 V

➞ 264 V

➞ 70 Hz

a/ c

5

a

6

2

z

z

c

c

- 2 x 2.52 mm2

2

- 2 x 1.52 mm

2

35

HUL-HUH

Voltage control

Principles

Overview

HUL and HUH control relays are designed to control AC or DC voltages.
They automatically recognise the shape of the DC or AC signal (50 or 60 Hz).

General principle:

The operating mode is set by the user.
A switch is used to select under or overvoltage modes, with or without latching.
The switch position, and hence the operating mode, is read by the product on energisation.
If the switch is set to a non-conforming position, the product goes into fault mode, the output relay stays open, and the LEDs flash to signal the position
error.
If the switch position changes while the unit is operating, all the LEDs flash but the product continues to work normally with the function 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.

The under or overvoltage threshold value is set by a graduated potentiometer as a percentage of the U scale to be monitored.
The hysteresis is set by a graduated potentiometer from 5 to 50% of the preset threshold. The hysteresis value cannot be higher than the extremes of the
measurement range.

HUL-HUH - Under/overvoltage - without latching

Un

1

2

3

2

1

4

Threshold

B

Hysteresis

C

Overvoltage function relay

D

Undervoltage function relay

E

Unit power-up

F

Controlled voltage

G

Delay on threshold crossing (Tt)

H

Tt

Tt

7

In overvoltage mode, if the controlled voltage exceeds the preset threshold for longer than the
time set on the front face (0.1 to 3 s), the output relay opens and LED R is extinguished. During

5

the time delay, this LED flashes.
Once the voltage falls below the threshold value minus the hysteresis, the relay closes
instantaneously.

6

In undervoltage mode, if the controlled voltage falls below the preset threshold for longer than the
time set on the front face (0.1 to 3 s), the output relay opens and LED R is extinguished. During

6

the time delay, this LED flashes.
Once the voltage rises above the threshold value plus the hysteresis, the relay closes
instantaneously.

HUL-HUH - Under/overvoltage - with latching

U

1

2

3

2

1

4

Threshold

B

Hysteresis

C

Overvoltage function relay

D

Undervoltage function relay

E

Unit power-up

F

Controlled voltage

G

Delay on threshold crossing (Tt)

H

Tt

Tt

7

If "with memory" mode has been selected, the relay opens and stays in this position when

5

threshold crossing is detected.
The power supply must be disconnected to reset the product.

6

6

36

Dimensions (mm)

HUL-HUH

3,5

www.crouzet.com

60

44

23,2

35

45

67,5

Connections

HUL-HUH

L2

L1

–/+

a /c

+/–

1 A fast-blow fuse or cut-out

B

1

F1

A1 A2 E3 E2 E1 M

A2

A1

12 11 14 22 21 24

90

2,6

5,5

– KM1

11

21

W1

U1

M1

3

R

12

22

14

24

NB:
When controlling DC voltage from the same source supplying terminals A1 and A2, terminal M must be connected directly to the "minus" pole of
this power supply.

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