Data sheet
CI-tronic™ Soft Start Motor Controller
Type MCI 25B with Brake
MCI 25B motor controller with brake is designed for soft starting and braking of 3 phase AC motors.
The digital controlled soft starter features accurate settings and several monitoring functions. Acceleration time and initial torque are along with the braking torque easily adjusted. During braking the MCI 25B will apply a DC current to all the windings of the motor,
thus providing a powerful brake function. The automatic stop detection ensures a safe operation. For positioning applications the unique slow speed function can be applied.
The MCI 25B controller is typically applied on demanding braking applications such as saws, cranes, automatic doors, etc.
Features |
yy Adjustable acceleration time, 0 – 10 seconds |
yy Automatic detection of missing phase(s) |
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yy Initial torque adjustable from 0 – 85%, with or |
yy Automatic adaptation to 50/60 Hz |
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without kick start (break-away) |
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yy Unlimited start and stop per hour |
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yy Adjustable DC injection brake, 0 – 50 A DC |
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yy IP 20 protection |
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yy Fast acting brake mode with automatic motor |
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field reduction |
yy Compact DIN rail mountable design |
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yy Automatic stop detection |
yy EN 60947-4-2 |
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yy Universal control voltage 24 – 480 V AC/DC |
yy CE, C-tick |
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yy Slow speed function, 7.5% or 10% of nom. |
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speed |
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yy SCR aux. contacts for external control of |
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by-pass, I-O and mechanical brake |
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© Danfoss | DCS (az) | 2018.02 |
IC.PD.C50.H3.02 | 1 |
Data sheet | Soft Start Motor Controller, Type MCI 25B
Adjustments
Motor torque
(voltage) Ramp-up time 0 – 10 sec.
Kick Start selectable
Initial torque up to 85% of nom. torque
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Slow speed
7.5% or 10%
Braking torque 0 – 50 A
Selection guide |
Operational |
Motor |
Motor |
Control |
Module |
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voltage |
current |
power |
voltage |
dimensions |
Code no. |
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[V AC] |
[A] |
[kW/HP] |
[V AC/DC] |
[mm] |
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208 – 240 |
25 |
7.5/10 |
24 – 480 |
90 |
037N0061 |
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380 – 480 |
25 |
1/15 |
25 – 480 |
90 |
037N0062 |
© Danfoss | DCS (az) | 2018.02 |
IC.PD.C50.H3.02 | 2 |
Data sheet | Soft Start Motor Controller, Type MCI 25B
Technical data |
Control circuit specifications |
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Control voltage range |
24 – 480 V AC/DC |
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Pick-up voltage max. |
20.4 V AC/DC |
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Drop-out voltage min. |
5 V AC/DC |
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Max. control current for no operation |
1 mA |
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Control current / power max. |
15 mA / 2 VA |
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Response time max. |
70 ms |
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Ramp-up time |
Adjustable from 0 to 10 Sec. |
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Brake current |
Adjustable from 0 to 50 A |
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Initial torque |
Adjustable from 0 to 85 % of nominal torque with |
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optional kick start |
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SCR aux. contacts, voltage/current max. |
24 – 480 V AC / 0.5 A (AC-14, AC-15) |
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SCR aux. contacts, max. fuse |
10 A gL/gG, I2t max. 72 A2s |
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Design standard |
CE marked according to EN 60947-4-2 |
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EMC immunity |
Meets requirements of EN 50082-1 and EN 50082-2 |
Output Specifications
Operational current max. (AC-3, AC-53a) |
25 A |
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Motor size at: |
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208 – 240 V AC |
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0.7 – 7.5 kW (1 – 10 HP) |
380 – 480 V AC |
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1 – 11 kW (1.5 – 15 HP) |
Leakage current max. |
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5 mA |
Minimum operational current |
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50 mA |
Overload relay trip class |
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Class 10 |
Semiconductor protection fusing |
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Type 1 co-ordination |
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80 A gL/gG |
Type 2 co-ordination |
I2t (t = 10 ms) |
6300 A2 S |
Rating index |
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Slip ring motors: 25A: AC-52a: 4-13: 100-3000 |
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Asynchronous motors: 25A: AC-53a: 8-3: 100-3000 |
Insulation
Rated insulation voltage, Ui |
660 V AC |
Rated impulse withstand voltage, Uimp |
4 kV |
Installation category |
III |
Thermal Specification
Power dissipation for continuous duty Pd max. |
2 W/A |
Power dissipation for Intermittent duty Pd max. |
2 W/A x Duty cycle |
Ambient temperature range |
-5 °C – 40 °C |
Cooling method |
Natural convection |
Mounting |
Vertical +/- 30 °C |
Max. ambient temperature with limited rating |
60 °C, see derating for high temperatures in chart below |
Storage temp. range |
-20 °C – 80 °C |
Protection degree/pollution degree |
IP 20 / 3 |
Materials
Housing |
Self extinguishing PPO UL94V1 |
Heatsink |
Aluminum black anodized |
Base |
Electroplated steel |
© Danfoss | DCS (az) | 2018.02 |
IC.PD.C50.H3.02 | 3 |