Power Connections; Optional Braking; Floating Networks - ABB ACS550-01 User Manual

20

Power Connections

Warning! Ensure the motor is compatible for use with the ACS550. The
ACS550 must be installed by a competent person in accordance with the
considerations defined in "Preparing for Installation" on page 7. If in doubt,
contact your local ABB sales or service office.
• Refer to the following table to complete the power connections. If appropriate,
also perform the instructions for the braking and floating networks.
Terminal
U1, V1, W1*
PE
U2, V2, W2
* For single phase supply voltage connect power at U1 and W1.

Optional Braking

• For drives with the braking accessory, install one of the following, depending on
the drive's frame size:
Frame Size
R1, R2
R3, R4, R5, R6

Floating Networks

For floating networks (also known as IT, ungrounded, or high impedance networks):
• Disconnect the internal RFI filter by removing both the EM1 and EM3 screws
(frame sizes R1...R4, see 17), or F1 and F2 screws (frame sizes R5...R6, see
16).
• 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 filter, such as one of the kits listed in the filter table on
12. Using an RFI filter grounds the input power through the filter capacitors, which
could be dangerous and could damage the unit.
Control Connections
To complete the control connections, use:
• Following tables
• "Application Macros" on page 31
• "Complete Parameter Descriptions" on page 50
• Cable recommendations in "Control Cables" on page 13
Installation
Frame Size Description
R1...R6 3-phase power supply input
R1...R6 Protective Ground
R1...R6 Power output to motor
Terminal Description
BRK+, BRK- Braking resistor
UDC+, UDC- DC bus
ACS550 User's Manual
Note
"Input Power (Mains) Connection" on
page 130.
Follow local rules for cable size.
"Motor Connection" on page 130.
Braking Accessory
Braking resistor.
• Braking unit or
• Chopper and resistor