Danfoss MCI 25B Data sheet

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

y Adjustable acceleration time, 0 – 10 seconds

y Initial torque adjustable from 0 – 85%, with or

without kick start (break-away)

y Adjustable DC injection brake, 0 – 50 A DC

y Fast acting brake mode with automatic motor

ﬁeld reduction

y Automatic stop detection

y Universal control voltage 24 – 480 V AC/DC

y Slow speed function, 7.5% or 10% of nom.

speed

y SCR aux. contacts for external control of

by-pass, I-O and mechanical brake

y Automatic detection of missing phase(s)

y Automatic adaptation to 50/60 Hz

y Unlimited start and stop per hour

y IP 20 protection

y Compact DIN rail mountable design

y EN 60947-4-2

y CE, C-tick

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Data sheet | Soft Start Motor Controller, Type MCI 25B

Adjustments

Motor torque (voltage)

Ramp-up time 0 – 10 sec.

Danfoss

A37-217.20

Selection guide

Kick Start selectable

Slow speed

7.5% or 10%

Initial torque up to 85% of nom. torque

Braking torque 0 – 50 A

Operational

voltage

[V AC] [A] [kW/HP] [V AC/DC] [mm]

208 – 240 25 7.5/10 24 – 480 90 037N0061 380 – 480 25 1/15 25 – 480 90 037N0062

Motor

current

Motor power

Control voltage

Module

dimensions

Code no.

IC.PD.C50.H3.02 | 2

Data sheet | Soft Start Motor Controller, Type MCI 25B

Technical data Control circuit speciﬁcations

Control voltage range 24 – 480 V AC/DC Pick-up voltage max. 20.4 V AC/DC Drop-out voltage min. 5 V AC/DC Max. control current for no operation 1 mA Control current / power max. 15 mA / 2 VA Response time max. 70 ms Ramp-up time Adjustable from 0 to 10 Sec. Brake current Adjustable from 0 to 50 A

Initial torque

SCR aux. contacts, voltage/current max. 24 – 480 V AC / 0.5 A (AC-14, AC-15) SCR aux. contacts, max. fuse 10 A gL/gG, I2t max. 72 A2s Design standard CE marked according to EN 60947-4-2 EMC immunity Meets requirements of EN 50082-1 and EN 50082-2

Output Speciﬁcations

Operational current max. (AC-3, AC-53a) 25 A Motor size at:

208 – 240 V AC 380 – 480 V AC

Leakage current max. 5 mA Minimum operational current 50 mA Overload relay trip class Class 10 Semiconductor protection fusing

Type 1 co-ordination Type 2 co-ordination I2t (t = 10 ms)

Rating index Slip ring motors: 25A: AC-52a: 4-13: 100-3000

Adjustable from 0 to 85 % of nominal torque with optional kick start

0.7 – 7.5 kW (1 – 10 HP) 1 – 11 kW (1.5 – 15 HP)

80 A gL/gG 6300 A2 S

Asynchronous motors: 25A: AC-53a: 8-3: 100-3000

Insulation

Rated insulation voltage, U Rated impulse withstand voltage, U Installation category III

imp

660 V AC 4 kV

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

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