ABB ACQ550-x1-06A6-2 User Manual page 276

276
IT systems
WARNING! Do not attempt to install or remove the EMC filter screws EM1, EM3, F1
or F2 while power is applied to the drive's input terminals.
For IT systems (an ungrounded power system or a high-resistance-grounded [over
30 ohm] power system):
• Disconnect the ground connection to the internal EMC filter, see section
Disconnecting the internal EMC filter
• Where EMC requirements exist, check for excessive emission propagated to
neighboring low voltage networks. In some cases, the natural suppression in
transformers and cables is sufficient. If in doubt, use a supply transformer with
static screening between the primary and secondary windings.
• Do NOT install an external RFI/EMC filter. Using an EMC filter grounds the input
power through the filter capacitors, which could be dangerous and could damage
the drive.
Drive's power connection terminals
The following table provides specifications for the drive's power connection
terminals.
Frame
size
1
R1
1
R2
1
R3
1
R4
1
R5
2
R6
1
Aluminium cable cannot be used with frame sizes R1...R5 because of its lower capacity.
2
Aluminium cable cannot be used with type ACQ550-01-290A-4 because of the terminal size.
3
See section
Note: See the recommended cable sizes for different load currents in section
wiring
Technical data
U1, V1, W1
U2, V2, W2
BRK+, UDC+ terminals
Minimum Maximum
wire size wire size
2 2
mm AWG mm
0.75 18 16
0.75 18 16
2.5 14 25
10 8 50
16 6 70
3 3
95 3/0 105
Power terminal considerations – R6 frame size
on page 274.
on page 23.
Tightening
torque
AWG N·m lb·ft
6 1.3 1
6 1.3 1
3 2.7 2
1/0 5.6 4
2/0 15 11
350 MCM 40 30
ACQ550-U1 User's Manual
Earthing PE terminal
Maximum Tightening
wire size
2
mm AWG N·m
16 6 1.3
16 6 1.3
25 3 2.7
50 110 5.6
70 2/0 15
105 350 MCM 40
00467918.xls C
on page 277.
Input power cables/
torque
lb·ft
1
1
2
4
11
30