Application guidelines
21
FRCC.PC.004.A9.22
Electrical connections and wiring
Soft starters
Voltage application range
IP rating
Starting current of Maneurop® 3-phase
compressors can be reduced by using a soft
starter. Two different versions are available:
CI-tronic
TM
soft starters type MCI (recommended)
and soft start kits with statoric resistors type SCR.
The starting current can be reduced by up to 50%
depending on the compressor model and the
type of soft starter. Also mechanical stresses that
occur at starting are reduced which increases the
life of the internal components.
For details of the CI-tronic
TM
MCI soft starters,
please refer to literature DKACT.PD.C50.
For details of the SCR soft start kits, please
contact Danfoss.
The number of starts should be limited to 6 per
hour. HP/LP pressure equalization is required
before starting.
The compressor terminal boxes IP rating
according to CEI 529 are shown on the outline
drawings section.
The IP ratings are only valid when correctly sized
cable glands of the same IP rating are applied.
IP 5 5
1st numeral, level of protection against contact and foreign objects
5
complete protection against contact and against harmful dust deposits
2nd numeral, level of protection against water
4
protection against water splashing from any direction
5
protection against jets of water from any direction
MT/ MTZ 1cyl = IP55 -- MT/ MTZ 2 cyl check section outline drawings -- MT/MTZ 4cyl = IP54
Motor Code
Nominal voltage
Voltage application range
1
208-230 V / 1 ph / 60 Hz
187 - 253 V
3
200-230 V / 3 ph / 60 Hz
180 - 253 V
4
380-400 V / 3 ph / 50 Hz
340 - 440 V
460 V / 3 ph / 60 Hz
414 - 506 V
5
220-240 V / 1 ph / 50 Hz
198 - 264 V
6
230 V / 3 ph / 50 Hz
207 - 253 V
7
500 V / 3 ph / 50 Hz
450 - 550 V
575 V / 3 ph / 60 Hz
517 - 632 V
9
380 V / 3 ph / 60 Hz
342 - 418 V