Using power factor compensation capacitors with the drive
Power factor compensation is not needed with AC drives. However, if a drive is to be
connected in a system with compensation capacitors installed, note the following restrictions.
WARNING!
Do not connect power factor compensation capacitors or harmonic filters to the
motor cables (between the drive and the motor). They are not meant to be used
with AC drives and can cause permanent damage to the drive or themselves.
If there are power factor compensation capacitors in parallel with the input of the drive:
1.
Do not connect a high-power capacitor to the power line while the drive is connected.
The connection will cause voltage transients that may trip or even damage the drive.
2.
If capacitor load is increased/decreased step by step when the AC drive is connected
to the power line, make sure that the connection steps are low enough not to cause
voltage transients that would trip the drive.
3.
Make sure that the power factor compensation unit is suitable for use in systems with
AC drives, ie, harmonic generating loads. In such systems, the compensation unit should
typically be equipped with a blocking reactor or harmonic filter.
Using a safety switch between the drive and the motor
ABB recommends to install a safety switch between the permanent magnet motor and the
drive output. The switch is needed to isolate the motor from the drive during maintenance
work on the drive.
Implementing the control of a contactor between drive and
motor
Implementing the control of the output contactor depends on the motor control mode and
stopping method selected.
When you select the DTC motor control mode and the motor ramp stop mode, use this
operation sequence to open the contactor:
1.
Give a stop command to the drive.
2.
Wait until the drive decelerates the motor to zero speed.
3.
Open the contactor.
WARNING!
If DTC motor control mode is in use, do not open the output contactor while the
drive controls the motor. The motor control operates faster than the contactor, and
tries to maintain the load current. This can cause damage to the contactor.
When you select the DTC motor control mode and the motor coast stop mode, you can
open the contactor immediately after the drive has received the stop command. This is the
case also if you use the scalar motor control mode.
Protecting the contacts of relay outputs
Inductive loads (relays, contactors, motors) cause voltage transients when switched off.
Guidelines for planning the electrical installation 79
Summary of Contents for ACS880-07LC
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 07LC drives Hardware manual ...
Page 2: ......
Page 4: ......
Page 12: ...16 Resistor braking Further information 12 Table of contents ...
Page 22: ...22 ...
Page 63: ...Mechanical installation 63 10 ...
Page 64: ...64 ...
Page 91: ...a b c 4 a 8 b 16 18 PE PE 10 13 12 Electrical installation 91 11 ...
Page 100: ...With FDPI 02 modules OPEN TERMIN ATED 1 1 2 2 OPEN TERMINATED 3 100 Electrical installation ...
Page 104: ...104 ...
Page 118: ...118 ...
Page 124: ...124 ...
Page 138: ...8 9 138 Maintenance ...
Page 139: ...11 12 12 6 10 Maintenance 139 ...
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Page 160: ...160 ...
Page 183: ...Technical data 183 ...
Page 184: ...184 Technical data ...
Page 189: ... Dimension drawing examples ACS880 07LC 0850A 7 Dimensions 189 ...
Page 190: ...ACS880 07LC 1660A 7 6 pulse 190 Dimensions ...
Page 191: ...ACS880 07LC 1660A 7 A004 12 pulse Dimensions 191 ...
Page 192: ...ACS880 07LC 3260A 7 192 Dimensions ...
Page 195: ... 600 mm with main breaker double busbar bottom cable entry Dimensions 195 ...
Page 197: ...Inverter module cubicle with two R8i modules bottom cable exit Dimensions 197 ...
Page 198: ...Inverter module cubicle with three R8i modules bottom cable exit 198 Dimensions ...
Page 199: ...Brake chopper cubicle Dimensions 199 ...
Page 200: ...200 ...
Page 216: ... Declaration of conformity 216 The Safe torque off function ...
Page 217: ...The Safe torque off function 217 ...
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