Electrical installation
50
Procedure
Cabling drawings with tightening torques for each frame size are presented on
pages
1. Frame sizes C and D only: Remove the two plastic connector covers at the top
and bottom of the drive. Each cover is fastened with two screws.
2. On IT (ungrounded) systems and corner grounded TN systems, disconnect the
internal varistors by removing the screw labelled VAR (located close to the
supply terminals on the power unit).
WARNING!
If a drive whose varistors are not disconnected is installed on an IT
system (an ungrounded power system or a high resistance grounded [over 30 ohms]
power system), the system will be connected to earth potential through the varistors
of the drive. This may cause danger or damage the drive.
If a drive whose varistors are not disconnected is installed on a corner grounded TN
system, the drive will be damaged.
3. Fasten the two cable clamp plates included to the drive (see page
), one at
the top, one at the bottom. The clamp plates are identical. Using the cable clamp
plates as shown below will provide better EMC compliance, as well as act as a
strain relief for the power cables.
4. Strip the power cables so that the shields are bare at the cable clamps.
5. Twist the ends of the cable shield wires into pigtails.
6. Strip the ends of the phase conductors.
7. Connect the phase conductors of the supply cable to the U1, V1 and W1
terminals of the drive.
Connect the phase conductors of the motor cable to the U2, V2 and W2
terminals.
Connect the conductors of the resistor cable (if present) to the R+ and R–
terminals.
With frame size C or D, attach the screw terminal lugs included to the
conductors first. Crimp lugs can be used instead of the screw lugs.
8. Tighten the cable clamps onto the bare cable shields.
9. Crimp a cable lug onto each shield pigtail. Fasten the lugs to ground terminals.
Note:
Try to work out a compromise between the length of the pigtail and the
length of unshielded phase conductors as both should ideally be as short as
possible.
10. Cover visible bare shield and pigtail with insulating tape.
11. With frame size C or D, cut suitable slots on the edges of the connector covers
to accommodate the supply and motor cables. Refit the covers. (Tighten the
screws to 3 N·m [25 lbf·in]).
12. Secure the cables outside the unit mechanically.
Summary of Contents for ACSM1 Series
Page 1: ...ACSM1 Hardware Manual ACSM1 04 Drive Modules 0 75 to 45 kW...
Page 2: ......
Page 4: ......
Page 14: ...Table of contents 14...
Page 20: ...About this manual 20...
Page 24: ...The ACSM1 04 24...
Page 30: ...Planning the cabinet assembly 30...
Page 46: ...Planning the electrical installation 46...
Page 70: ...Maintenance 70...
Page 84: ...Technical data 84...
Page 90: ...Mains filters 90...
Page 96: ...Dimension drawings 96 Frame size A...
Page 97: ...Dimension drawings 97...
Page 98: ...Dimension drawings 98 Frame size B...
Page 99: ...Dimension drawings 99...
Page 100: ...Dimension drawings 100 Frame size C air cooled module...
Page 101: ...Dimension drawings 101...
Page 102: ...Dimension drawings 102 Frame size C for cold plate mounting...
Page 103: ...Dimension drawings 103 Frame size D air cooled module...
Page 104: ...Dimension drawings 104 Frame size D for cold plate mounting...
Page 106: ...Dimension drawings 106 Mains filters type JFI xx...
Page 108: ...Dimension drawings 108 Braking resistors type JBR xx...
Page 110: ...Dimension drawings 110...
Page 111: ......