Crouzet 84871122 Data Sheet

Current control

MIC

Part numbers

Product adaptations

General characteristics

➜ Single function current control relay with current transformer - 17.5 mm

■ Control of AC currents

■ Built-in current transformer

■ Measurement ranges from 2 A to 20 A

■ Choice of output relay action

■ True RMS measurement

Type Functions Measurement range Nominal voltage (V) Code

MIC Overcurrent (or undercurrent) 2

■ Customisable colours and labels

■ Current range adjustable up to 50 A

■ Adjustable fixed hysteresis

➞ 20 A

24

➞ 240 V

z

84871122

Supply

Supply voltage Un
Voltage supply tolerance -15% / +10%

Operating range
Polarity with DC voltage

a

supply voltage frequency
Galvanic isolation of power supply/measurement
Power consumption at Un

Immunity from micro power cuts 10 ms

Inputs and measuring cicuit

Measurement range 2
Permanent overload at 25°C 100 A
Pulse overload < 3 s
Frequency of measured signal 40
Max. measuring cycle time 30 ms/True RMS measurement
Threshold adjustment 10
Fixed hysteresis 15% (fixed) of displayed threshold
Display precision ±10% of full scale
Repetition accuracy with constant parameters ± 0.5%
Measuring error with voltage drift < 1%
Measuring error with temperature drift ± 0.05% / °C

Timing

Response time 200 ms
Delay on pick-up 500 ms

Output

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

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

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

➞ 25°C 300 A

24 V

20.4 V

✓

50 / 60 Hz ± 10%

✓

3 VA in

➞ 20 A

➞ 70 Hz sinusoidal

➞ 100% of the range

250 V

z

5 A
10 mA / 5 V
1 x 10
1250 VA

30 x 10

> 500 MΩ @ 500 V

z

➞ 240 V

➞ 264 V

a

et 1 W in

z

c

5

manœuvres

a

6

manœuvres

z

c

c

38

www.crouzet.com

General characteristics

General characteristics

Display power supply Green LED
Display relay Yellow LED
Casing 17.5 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: IP20

Weight 110 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
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 / 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

Conformity with environmental directives RoHS, WEEE

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

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

2

- 2 x 2.52 mm2

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

➞ 150 Hz, A = 0.035 mm

2

- 2 x 1.52 mm

pending

2

Principles

MIC
Overview

The MIC control relay is designed to control overcurrents (or undercurrents).
It has a built-in current transformer.

Operating principle

MIC - Overcurrent

5

The MIC relay controls the overcurrent. The relay closes when the current exceeds the threshold
displayed on the front face and opens when it falls below the threshold minus the hysteresis.
When terminal Y1 is connected to A1 (+), the output is inverted. The relay opens when the
current exceeds the threshold displayed on the front face and closes again when it falls back

1

2

3

4

t

5

below the hysteresis (undercurrent).

6

Can be used for undercurrent control: ask your sales adviser.

Threshold

B

Hysteresis

C

Closing on threshold crossing mode (Y1 and A1 not connected)

D

Opening on threshold crossing mode (Y1 and A1 connected)

E

Unit power-up

F

Current control

G

Dimensions (mm) Connections

MIC

17,5

97

91,5

44

MIC

a (–)

a (+)

F1

1

A1 A2Y1

>

90

35,3

2,8

45

67,5

10

100 mA fast-blow fuse or cut-out

B

I

12 1411

11

R

14

12

39