Danfoss MCI 15C, MCI 25C, MCI 50CM-3 I-O Data sheet
Data sheet
CI-tronic™ Soft starters for Danfoss commercial
compressor applications
Type MCI 15C, MCI 25C, MCI 50CM-3 I-O
The MCI compressor soft starters are designed for
soft starting of 3 phase compressors.
During start the MCI will gradually increase the
voltage to the motor until it reaches full line
voltage.
The soft start ramp-up time and initial start
torque is preset to ensure a fast start and allow
easy and quick installation.
MCI compressor soft starters are ideal for use on
Danfoss Performer scroll and Maneurop
Reciprocating compressors. The starting current
can be reduced by up to 40% of the direct on line
value.
Features • Universal control voltage: 24 – 480 V AC/DC
• Automatic detection of missing phases
• LED Status indication.
• Automatic adaptation to 50/60 Hz
• Easy and quick installation
• Up to 12 start/stop operations per hour
• Built in varistor protection
• IP20 Protection
• Compact modular design
• DIN rail mountable
• Ramp-time max. 0.5 s (factory set-up)
• EN 60947-4-2
© Danfoss | DCS (az) | 2018.04
IC.PD.C50.B3.02 | 1
Data sheet | CI-tronic™ Soft starters for Danfoss commercial compressor applications, Type MCI 15C, MCI 25C, MCI 50CM-3 I-O
Functional diagram
Mains voltage, L1, L2, L3
Control voltage (A1, A2)
Motor voltage ( T1, T2, T3)
LED 1
LED 2
23-24 bypass (MCI 25C/MCI 50CM-3 I-O)
SCR contact:
Functional description
LED status indication
Start
During ramp-up the controller will gradually
increase the voltage to the motor from the preset
initial torque value until it reaches full line
voltage. The actual ramp time is digitally
calculated and will not be influenced by net
frequency or load variations.
LED 1
LED 2
Stand Ramp Full Line or
by up on load error
Bypass mode (contact 23-24, only MCI 25C/
MCI 50CM-3 I-O)
The auxiliary contacts are made possible by
means of SCR technology and will only switch
correctly on a.c. current. The contact is intended
for operating an external bypass contactor. The
contact will close when the controller is in steady
state operation, see application example page 7.
© Danfoss | DCS (az) | 2018.04
IC.PD.C50.B3.02 | 2
Data sheet | CI-tronic™ Soft starters for Danfoss commercial compressor applications, Type MCI 15C, MCI 25C, MCI 50CM-3 I-O
Soft starter selection guide
Performer® scroll compressors
Motor voltage code 4, 400 V - 3 phase - 50 Hz / 460 V - 3 phase - 60 Hz
Compressor model
SM/SZ 084
SM/SZ 090
SM/SZ 100
SM/SZ 110
SM/SZ 115-125
SM/SZ 120
SM/SZ 160
SM/SZ 148-161
SM/SZ 175-185
SY/SZ 240
SY/SZ 300
SZ 380 MCI 50CM-3 I-O 1) MCI 50CM-3 I-O 1)
) The controller must be by-passed in steady state mode. See application example page 7
Soft starter type
Ambient temp. max. 40 °C
MCI 15C
MCI 25C MCI 25C 1)
MCI 50CM-3 I-O 1) MCI 50CM-3 I-O 1)
Soft starter type
Ambient temp. max. 55 °C
MCI 15C
MCI 25C
Maneurop® compressors
Motor voltage code 4, 400 V - 3 phase - 50 Hz / 460 V - 3 phase - 60 Hz
Compressor model
MT/MTZ 18-22
MT/MTZ 28
MT/MTZ 32
MT/MTZ 36
MT/MTZ 40
MT/MTZ 44-50
MT/MTZ 45-51
MT/MTZ 56
MT/MTZ 57-65
MT/MTZ 64
MT/MTZ 72-73-80-81 MCI 25C
MT/MTZ 100
MT/MTZ 125
MT/MTZ 144
MT/MTZ 160
) The controller must be by-passed in steady state mode. See application example page 7
Soft starter type
Ambient temp. max. 40 °C
MCI 15C
MCI 25C MCI 25C 1)
Soft starter type
Ambient temp. max. 55 °C
MCI 15C
© Danfoss | DCS (az) | 2018.04
MCI C Soft Starter selection
Type
MCI 15C 380 – 480 45 037N0076
MCI 25C 380 – 480 90 037N0077
MCI 50CM-3 I-O 380 – 480 180 037N0401
Operational voltage Module dimensions
[V AC] [mm]
Code no.
IC.PD.C50.B3.02 | 3
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