Danfoss DSH Series Application Guidelines

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Soft starts
Soft starters are designed to reduce the
starting current of 3-phase AC motors.
Soft starter must be set so compressor start-up
time is always less than 0.5 seconds to ensure
proper lubrication of compressor parts.
Ramp-down must be set to minimum to ensure
proper discharge valve closing.
Danfoss MCI and MCD soft-start controller are
available as accessories: MCI and MCD can reduce
the inrush current up to 40%.
Selection table:
Compressor model
Soft start reference
Ambient max. 40°C
Soft start reference
Ambient max. 55°C
DSH090 code 4 MCI15C MCI15C
DSH105-120 code 4 MCI25C MCI25C
DSH140-161 code 4 MCI25C MCI25C*
DSH184-240 code 4 MCI50CM MCI50CM
DSH295 code 4 MCI50CM MCI50CM*
DSH381 code 4 MCI50CM* MCI50CM*
DSH485 code 4 MCD201-055 MCD201-055
DSH485 code 3 MCD5-0195B-T5 MCD5-0195B-T5
• MCI15C, MCI25C, MCI50CM replaces the
contactor KM . All settings such as initial torque,
ramp-up time (less than 0.5 sec) and ramp-
down time are preset and do not require any
modification.
See wiring diagram:
• MCI25M*, MCI50CM* requires a by-pass
contactor K1. This configuration is needed to
withstand current or temperature levels. All
settings such as initial torque, ramp-up time
(less than 0.5 sec) and ramp-down time are
preset and do not require any modification.
See wiring diagram:
Q1
Provide power supply and electrical protection
R
Frequency Initial torque (%U) Voltage Ramp-up (seconds) Ramp-down (seconds)
50 Hz 60% 2 0
60 Hz 70% 0,5 0
• For MCD201-055, the following settings have to
be adjusted:
• For MCD5-0195B-T5, constant current mode has
to be used with Current Limit / Initial Current set
at 400A.
46 FRCC.PC.045.A7.02

Danfoss DSH Series Specifications

General

Brand	Danfoss
Model	DSH Series
Category	Air Compressor
Language	English