
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.
The relay contacts on the drive control unit are protected with varistors (250 V) against
overvoltage peaks. In spite of this, it is highly recommended that inductive loads are equipped
with noise attenuating circuits (varistors, RC filters [AC] or diodes [DC]) to minimize the
EMC emission at switch-off. If not suppressed, the disturbances may connect capacitively
or inductively to other conductors in the control cable and form a risk of malfunction in other
parts of the system.
Install the protective component as close to the inductive load as possible. Do not install
protective components at the relay outputs.
230 V AC
230 V AC
+ 24 V DC
1
2
3
4
Relay output
1
Varistor
2
RC filter
3
Diode
4
90 Guidelines for planning the electrical installation
Содержание ACS880-37LC-0390A-7
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Страница 70: ...70 Mechanical installation ...
Страница 110: ...10 110 Electrical installation ...
Страница 113: ...With FDPI 02 modules OPEN TERMINATED 1 1 2 2 OPEN TERMINATED 3 Electrical installation 113 11 ...
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Страница 148: ...a b c 148 Maintenance ...
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Страница 199: ... Dimension drawing examples ACS880 37LC 0390A 7 with main contactor Dimensions 199 ...
Страница 201: ...ACS880 37LC 1270A 7 with common motor terminal cubicle Dimensions 201 ...
Страница 202: ...ACS880 37LC 1940A 7 with common motor terminal cubicle 202 Dimensions ...
Страница 205: ...Location and size of input terminals Contact ABB for details Dimensions 205 ...
Страница 206: ... 100 kA input cubicle option F274 206 Dimensions ...
Страница 208: ...Inverter module cubicle with two R8i modules bottom cable exit 208 Dimensions ...
Страница 209: ...Inverter module cubicle with three R8i modules bottom cable exit Dimensions 209 ...
Страница 210: ...Brake chopper cubicle 210 Dimensions ...
Страница 211: ... Units with common motor terminal cubicle H359 Cubicle width 300 mm bottom cable exit Dimensions 211 ...
Страница 212: ...Cubicle width 300 mm top cable exit 212 Dimensions ...
Страница 213: ...Cubicle width 400 mm bottom cable exit Dimensions 213 ...
Страница 214: ...Cubicle width 400 mm top cable exit 214 Dimensions ...
Страница 215: ...Cubicle width 600 mm bottom cable exit Dimensions 215 ...
Страница 216: ...Cubicle width 600 mm top cable exit 216 Dimensions ...
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