Data sheet

CI-Tronic™ Soft start motor controller

MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

The MCI soft starters are designed for soft starting and stopping of 3 phase AC motors, thus reducing the inrush current and eliminating the damaging effects of high starting torque surges.

The digitally controlled soft starter features accurate settings and easy installation.

The controller has individually adjustable acceleration and deceleration times.

Thanks to the adjustable initial torque and the unique breakaway (kick start) function the soft starter can be optimized for almost any application.

The MCI soft starters are typically used on motor applications where a smooth start and/or stop is advantageous, such as conveyors, fans, pumps, compressors and high inertia loads. MCI soft starters are also obvious as replacement for star/delta starters.

Features • Motor load max. 50 A

• Acceleration times adjustable:

0 – 10 seconds, MCI 3, MCI 15 and MCI 25

0 – 20 seconds, MCI 30 I-O

0 – 30 seconds, MCI 40-3D I-O, MCI 50-3 I-O

• Deceleration times adjustable:

0 – 10 seconds, MCI 3, MCI 15, and MCI 25

0 – 20 seconds, MCI 30 I-O

0 – 60 seconds, MCI 40-3D I-O, MCI 50-3 I-O

• Initial torque adjustable up to 85%

• Breakaway function (kick start)

• Universal control voltage:

24 – 480 V AC / DC

• Automatic detection of missing phases

• Automatic adaptation to 50/60 Hz

• Optional auxiliary contacts

• LED Status indication

• Unlimited start/stop operations per hour

• Built in varistor protection

• Compact modular design

• DIN rail mountable

• EN 60947-4-2

• CE and

C

UL

US

(UL 508)

• EAC and LLC approved

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 1

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Adjustments

Motor torque

(voltage)

Ramp-up time Ramp-down time

Kick start selectable

Time

Adjustable starting torque

Selection guide

Operational voltage

Motor current max.

15A

Motor power max.

Dimensions Type

Aux. contacts

Code no.

208 – 240 V AC

208 – 240 V AC

208 – 240 V AC

208 – 240 V AC

380 – 415 V AC

440 – 480 V AC

380 – 480 V AC

380 – 480 V AC

380 – 480 V AC

380 – 480 V AC

25A

25A (30A)*

3A

3A

15A

25A

25A (30A)*

29A (43A)*

4.0 kW / 5.5 HP

7.5 kW / 10 HP

45 mm module

90 mm module

11 kW / 15 HP* 90 mm module

MCI 15

MCI 25

MCI 25

35A (50A)* 15 kW / 20 HP* 180 mm module MCI 50–3 I–O

–

–

I–O, bypass

I–O, bypass

037N0037

037N0038

037N0069

037N0089

1.5 kW / 2 HP 22.5 mm module

1.5 kW / 2 HP

7.5 kW / 10 HP

22.5 mm Module

45 mm module

MCI 3

MCI 3

MCI 15

–

–

–

037N0074

037N0084

037N0039

037N0040 11 kW / 15 HP 90 mm module MCI 25 –

15 kW / 20 HP* 90 mm module MCI 30 I–O I–O, bypass 037N0070

21 kW / 28 HP* 90 mm module MCI 40–3D I–O I–O, bypass 037N0092

380 – 480 V AC

500 – 600 V AC

500 – 600 V AC

35A (50A)*

15A

25A

22 kW / 30 HP* 180 mm module MCI 50–3 I–O

7.5 kW / 10 HP

15 kW / 20 HP

45 mm module

90 mm module

MCI 15

MCI 25

I–O, bypass

–

–

037N0090

037N0041

037N0042

* If used with bypass contactor

2 | 520B8054 | IC.PD.C50.A5.02

© Danfoss | DCS (im) | 2017.06

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Technical data

Output Specification

Operational current max.

208 – 240 V AC

380 – 480 V AC

500 – 600 V AC

Leakage current max

Min. operational current

Overload relay trip class

Semiconductor protection

Type 1 co-ordination

Type 2 co-ordination

I 2 t (t = 10ms)

MCI 3

3A

MCI 15

15A

MCI 25

25A

Motor size at:

MCI 30 I-O

30A

(if bypassed during steady state)

0.1 – 0.7 kW (0.18 – 1 HP) 0.1 – 4.0 kW (0.18 – 5.5 HP) 0.1 – 7.5 kW (0.18 – 10 HP) 0.1 – 11 kW (0.18 – 15 HP)

MCI 40-3D I-O

43A

(if bypassed during steady state)

MCI 50-3 I-O

50A

(if bypassed during steady state)

0.1 – 15 kW (0.18 – 20 HP)

0.1 – 1.5 kW (0.18 – 2 HP) 0.1 – 7.5 kW (0.18 – 10 HP) 0.1 – 11 kW (0.18 – 15 HP) 0.1 – 15 kW (0.18 – 20 HP) 0.1 – 21 kW (0.18 – 28 HP) 0.1 – 22 kW (0.18 – 30 HP)

0.1 – 2.2 kW (0.18 – 3 HP) 0.1 – 7.5 kW (0.18 – 10 HP) 0.1 – 15 kW (0.18 – 20 HP) 0.1 – 18.5 kW (0.18 – 25 HP)

25A gL/gG

72 A2s

50 A gL/gG

1800 A2s

80 A gL/gG

6300 A2 s

5 mA

50 mA

Class 10

AC-53a

Asynchronous motors

AC-53b Asynchronous motors with bypass

AC-58a Hermetic refrigeration compressors

–

3A : AC – 53b : 5 – 5 : 10

–

15A : AC – 53a : 8 – 3 :

100 – 3000

–

15A : AC – 58a : 6 – 6 :

100 – 3000

Rating index:

25A : AC – 53a : 6 – 5 :

100 – 480

–

25A : AC – 58a : 6 – 6 :

100 – 480

Control Circuit Specifi cations

Control voltage range

Pick-Up voltage max.

Drop-out voltage min.

24 – 480 V AC / DC

20.4 V AC / DC

5 V AC / DC

Max. control current for no operation

Control current /

Power max.

Response time max.

Ramp -up time

1 mA

15 mA / 2 VA

70 ms adjust. from 0 – 10 seconds

Ramp-down time

Initial Torque

SCR Aux. contacts, opt.

Voltage/current max.

(AC-14, AC-15)

Fuse max. I 2 t (t = 10ms) adjust. from 0 – 10 seconds adjust. from 0 – 85% of nominal torque with optional kick start

24 – 480 V AC / 0.5 A

10 A gL/gG, I 2 t max. 72 A 2 s

EMC immunity and emission Meets requirements of EN 60947-4-2

Insulation

Rated installation voltage, U i

660 V AC

Rated impulse withstand voltage, U imp

V

Installation Category

4 k

III

80 A gL/gG

6300 A2 s

25A : AC – 53a : 6 – 5 :

100 – 480

25A : AC – 58a : 6 – 6 :

100 – 480

0 – 20 seconds

0 – 20 seconds

80 A gL/gG

6300 A2 s

29A : AC – 53a : 6 – 5 :

100 – 120

0.1 – 30 kW (0.18 – 40 HP)

125 A gL/gG

0 – 30 seconds

0 – 60 seconds

25300 A2 s

35A : AC – 53a : 6 – 6 :

00 – 120

30A : AC – 53b : 5 – 5: 30 43A : AC – 53b : 5 – 5 : 30 50A : AC – 53b : 6 – 6 : 30

– –

24 – 480 V AC / 1.0 A

Thermal specifications

MCI 3 MCI 15 MCI 25

Power dissipation*), continuous duty max.:

Power dissipation*),

Intermittent duty max.:

4 W

4 W

2 W/A

2 W/A x duty cycle

Ambient temperature range -5 °C – 40 °C

Cooling method

Mounting

Max. ambient temperature with limited rating

Storage temp. range

Protection degree / pollution degree

Natural convection

Vertical +/- 30°

60 °C, see derating for high temperatures in chart page 7

-20 °C – 80 °C

IP20 / IP3

Materials

Housing

Heatsink

Base

Self extinguishing PPO UL94V1

Aluminum black anodized

Electroplated steel

*) If used without a bypass contactor

MCI 30 I-O MCI 40-3D I-O

3 W/A

MCI 50-3 I-O

3 W/A x duty cycle

IP10 / IP3

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 3

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Functional diagram

Mains voltage L1, L2, L3

Control voltage (A1, A2)

Motor voltage (T1, T2, T3)

LED 1

LED 2

Aux. contacts:

23 – 24 bypass

13 – 14 I-O

Example 1: Example 2:

Soft start and soft stop Soft start with kick start and soft stop

Functional description Ramp up

During ramp-up the controller will gradually increase the voltage to the motor until it reaches full line voltage.

The motor speed will depend on the actual load on the motor shaft. A motor with little or no load will reach full speed before the voltage has reached its maximum value. The actual ramp time is digitally calculated and will not be influenced by other settings, net frequency or load variations.

Auxiliary contacts, optional

The auxiliary contacts are made possible by means of

SCR technology and will only switch correctly on

AC current.

I-0 contact (13 – 14):

The contact will be closed as long as the controller receives a control voltage, see functional diagram.

Initial torque

The initial torque is used to set the initial starting voltage. This way it is possible to adapt the controller to an application requiring a higher starting torque. In some cases on application with very high break-away torque the initial torque can be combined with a kick start function. The kick start is a period of 200 ms where the motor receives full voltage.

Bypass contact (23 – 24):

The contact is intended for operating an external bypass contactor. The contact will close when the controller is in steady state operation, see functional diagram.

Soft stop

During ramp-down the controller will gradually reduce the voltage to the motor thus reducing the torque and current. As a consequence the motor speed will fade off. The soft stop feature is advantageous to avoid liquid hammering and cavitation on pumps, and to avoid goods tilting on conveyors.

LED status indication

LED status indication:

LED 1

LED 2

Stand by

Ramp- up

Full on

Ramp- down

Line or load error

4 | 520B8054 | IC.PD.C50.A5.02

© Danfoss | DCS (im) | 2017.06

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Wiring

MCI 15, MCI 25 MCI 30 I-O MCI 50-3

Overload and Short Circuit

Protection

Overload and short circuit protection is easily achieved by installing a circuit breaker on the line side of the soft starter. Select the circuit breaker from the table according to motor full load current.

Be aware of the maximum prospective short circuit current breaking capacity. For further information please refer to the data sheet on the circuit breaker.

Motor full load current in A

Soft starter

Type

0.40 – 0.63

0.63 – 1.0

1.0 – 1.6

1.6 – 2.5

2.5 – 4.0

4 – 6.3

6.3 – 10

10 – 16

MCI 15

MCI 15

MCI 15

MCI 15

MCI 15

MCI 15

MCI 15

MCI 15

14.5 – 20

18 – 25

18 – 25

23 – 32

MCI 25/30 I-O

MCI 25/30 I-O

MCI 25/30 I-O

MCI 50 I-O

32 – 45

40 – 63

MCI 50 I-O

MCI 50 I-O

*) Type 2 co-ordination can only be achieved with MCI 25

Soft starter

I 2 t value

380 – 415 V AC

Circuit breaker

Type

1800 A 2 s

1800 A 2 s

1800 A 2 s

1800 A 2 s

1800 A 2 s

1800 A 2 s

1800 A 2 s

1800 A 2 s

6300 A 2 s

6300 A 2 s

6300 A 2 s

25300 A 2 s

25300 A 2 s

25300 A 2 s

CTI 25M

CTI 25M

CTI 25M

CTI 25MB

CTI 25MB

CTI 25MB

CTI 25MB

CTI 25MB

CTI 25MB

CTI 25MB

CTI 45MB

CTI 45MB

CTI 45MB

CTI 100

Max. prospective shortcircuit current I cc

for co-ordination 2

100 kA

100 kA

100 kA

100 kA

100 kA

4 kA

1.5 kA

2.5 kA*)

1.8 kA

1.5 kA

1.3 kA

6 kA

4 kA

5 kA

Circuit breaker

Code no.

047B3143

047B3144

047B3145

047B3153

047B3154

047B3155

047B3156

047B3157

047B3158

047B3159

047B3163

047B3164

047B3165

047B3014

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 5

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Operation at high temperatures

If soft starter is used without external bypass contactor:

Ambient temperature

40 °C

50 °C

MCI 3

3 A

2.5 A*

60 °C 2.0 A*

* Minimum 10 mm side clearance between products

MCI 15

15 A

12. 5 A

10 A

Continuous current

MCI 25 MCI 30 I-O

25 A 25 A

20 A

17 A

20 A

17 A

MCI 40-3D I-O

29 A

23 A

20 A

MCI 50-3 I-O

35 A

30 A

25 A

Ambient temperature

40 °C

50 °C

60 °C

MCI 15 MCI 25

Duty-cycle rating (15 min. max. on-time)

MCI 30 I-O

15 A (100% duty-cycle) 25 A (100% duty-cycle) 25 A (100% duty-cycle)

MCI 40-3D I-O

43 A (65% duty-cycle)

15 A (80% duty-cycle)

15 A (65% duty-cycle)

25 A (80% duty-cycle)

25 A (65% duty-cycle)

25 A (80% duty-cycle)

25 A (65% duty-cycle)

43 A (50% duty-cycle)

43 A (40% duty-cycle)

If soft starter is used with external bypass contactor:

Ambient temperature

40 °C

50 °C

60 °C

MCI 25

15

15

15

MCI 25

25

25

25

Continuous current

MCI 30 I-O

30

30

30

MCI 40-3D I-O

43

43

43

MCI 50-3 I-O

50 A (65% duty-cycle)

50 A (55% duty-cycle)

50 A (45% duty-cycle)

MCI 50-3 I-O

50

50

50

Over heat protection If required the controller can be protected against overheating by inserting a thermostat in the slot on the right-hand side of the controller.

Order: UP 62 thermostat 037N0050

Depending on the application the thermostat can be connected in series with the control circuit of the main contactor. When the temperature of the heat sink exceeds 90 °C the main contactor will be switched OFF.

A manual reset is necessary to restart this circuit.

For wiring connections see application examples page 8.

Not with MCI 3

Mounting Instructions The controller is designed for vertical mounting. If the controller is mounted horizontally the load current must be reduced by 50%.

The controller needs no side clearance.

Clearance between two vertical mounted controller must be minimum 80 mm (3.15”).

Clearance between controller and top and bottom walls must be minimum 30 mm (1.2”).

6 | 520B8054 | IC.PD.C50.A5.02

© Danfoss | DCS (im) | 2017.06

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Application examples Overheat protection

Example 1

The thermostat can be connected in series with the control input of the soft starter. When the temperature of the heat sink exceeds 90 °C the soft starter will be switched OFF.

NOTE: when the temp. has dropped approx. 30 °C the controller will automatically be switched ON again.

This is not acceptable in some applications.

Example 2

The thermostat is connected in series with the control circuit of the main contactor When the temp. of the heat sink exceeds 90 °C the main contactor will be switched OFF. This circuit requires manual reset to restart the motor.

Line Controlled Soft start

When the contactor C1 is switched to the ON-State, the soft starter will start the motor, according to the settings of the Ramp-up time and Initial torque adjustments.

When the contactor C1 is switched to the OFF-State the motor will be switched off instantaneously.

In this application the contactor will have no load during making operation. The contactor will carry and break the nominal motor current.

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 7

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Application examples

(Cont.)

Input controlled soft start

When the control voltage is applied to A1 – A2, the MCI soft starter will start the motor, according to the settings of the Ramp-up time and Initial torque adjustments.

When the control voltage is switched OFF, the motor will be soft stopped according to the settings of the

Ramp-down time adjustment.

To switch off instantaneously set the Ramp-down time to 0.

Combined reversing contactor and soft starter

Soft Start & Soft Stop

A soft – reversing of a motor can easily be achieved by connecting a reversing contactor to the soft starter.

The reversing contactor, type RCI, will determine the direction of rotation, forward or reverse and the soft starter, type MCI, will perform soft-starting and softstopping of the motor.

Soft Start only

If soft-stop is not required the application can be simplified by connecting the control circuit, of the soft starter, to the main terminals as shown under Line controlled Soft-Start (see example on page 8).

A delay of approx. 0.5 sec. between forward and reverse control signal must be allowed to avoid infl uence from the voltage generated by the motor during turn-off.

Instead of the electronic reversing contactor, type

RCI, an electromechanical reversing contactor can be applied. Due to the soft starter the reversing contactor will not be exposed to high inrush currents. As a result a longer life time of the electromechanical contactor can be expected.

8 | 520B8054 | IC.PD.C50.A5.02

© Danfoss | DCS (im) | 2017.06

Data sheet | CI-Tronic™ Soft start motor controller MCI 3, MCI 15, MCI 25, MCI 30 I-O, MCI 40-3D and MCI 50-3 I-O

Application examples

(Cont.)

MCI with bypass contactor

If the MCI soft starter is bypassed during steady state operation there is no heat dissipation.

A bypassed MCI can be loaded according to tabel page

7: “Operating at high temperatures”.

By means of the integrated auxiliary contact the bypass function is easily achieved. See wiring diagram below and “Functional diagram” page 5.

As the contactor always switches in after end of ramp up time it can be selected on the basis of the thermal current (AC-1).

MCI 30 I-O

MCI 40-3D I-O

Inside - delta motor configuration

Bypass contactor

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 9

Dimensions mm (inch)

MCI 3 MCI 15

MCI 25, MCI 30 I-O

MCI 40-3D I-O

MCI 50-3 I-O

© Danfoss | DCS (im) | 2017.06

IC.PD.C50.A5.02 | 520B8054 | 10