Electrical installation of custom brake resistors
■
Connection diagram
R+
R‚
R+
R‚
1
2
3
t
°
Brake chopper
Brake resistor
1 2
X1
■
Connection procedure
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
•
Do the steps in section Electrical safety precautions in chapter Safety instructions before
you start the work.
•
Connect the resistor cable at the resistor end only. If a shielded three-conductor cable
is used, cut off the third conductor. Ground the twisted shield of the cable as well as
any separate PE conductor (if present).
•
At the chopper end of the cable, connect the R+ and R- conductors of the resistor cable
together. Measure the insulation resistance between the combined conductors and the
PE conductor by using a measuring voltage of 1 kV DC. The insulation resistance must
be higher than 1 Mohm.
268 Resistor braking
Connection procedure
WARNING!
Obey the instructions in chapter
Safety instructions
. If you
ignore them, injury or death, or damage to the equipment can occur.
•
Do the steps in section
Precautions before electrical work
on page
19
before you start
the work.
•
Connect the resistor cable at the resistor end only. If a shielded three-conductor cable
is used, cut off the third conductor. Ground the twisted shield of the cable as well as
any separate PE conductor (if present).
•
At the chopper end of the cable, connect the R+ and R- conductors of the resistor
cable together. Measure the insulation resistance between the combined conductors
and the PE conductor by using a measuring voltage of 1 kV DC. The insulation
resistance must be higher than 1 Mohm.
•
Connect the resistor cable to the R+ and R- terminals of the chopper. If a shielded
three-conductor cable is used, cut off the third conductor. Ground the twisted shield of
the cable as well as any separate PE conductor (if present).
•
Connect the thermal switch of the brake resistor to the enable input (X1) on the brake
chopper control board. Use cable specified under
Thermal protection of the resistors
(page
267
). If there are multiple thermal switches, connect them in series.
WARNING!
The ENABLE input terminal block of the brake chopper is at
intermediate circuit potential when the supply unit of the drive is running. This
voltage is extremely dangerous and can cause serious damage or injury if the
isolation level and protection conditions for the thermal switches are not sufficient. The
thermal switches must always be properly insulated (over 2.5 kV) and shrouded against
contact.
Start-up
Check the settings of the following inverter control program parameters (ACS880 primary
control program):
•
30.30 Overvoltage control
: Overvoltage control disabled.
For settings of other control programs, see the appropriate firmware manual.
Note:
New brake resistors may be coated with storage grease. As the brake chopper
operates for the first time, the grease burns off and may produce some smoke. Make sure
there is proper ventilation.
ohm
R-
R+
PE
•
Connect the resistor cable to the R+ and R- terminals of the chopper. If a shielded
three-conductor cable is used, cut off the third conductor. Ground the twisted shield of
the cable as well as any separate PE conductor (if present).
Resistor braking 209
Summary of Contents for ACS880-07CLC
Page 1: ...ABB industrial drives Hardware manual ACS880 07CLC drives ...
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Page 91: ...PE PE 10 13 12 22 Electrical installation 91 ...
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Page 132: ...5 4 11 7 6 8 132 Maintenance ...
Page 133: ...14 15 16 12 13 17 Maintenance 133 ...
Page 141: ...5 Set the real time clock Maintenance 141 ...
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Page 176: ...ACS880 07CLC 0390A 7 C121 marine construction 176 Dimensions ...
Page 177: ...ACS880 07CLC 1310A 7 Dimensions 177 ...
Page 178: ...ACS880 07CLC 2180A 7 C121 marine construction 178 Dimensions ...
Page 179: ...ACS880 07CLC 3260A 7 C121 marine construction Dimensions 179 ...
Page 181: ... 2 D8D Dimensions 181 ...
Page 182: ... 3 D8D 182 Dimensions ...
Page 183: ... 4 D8D Dimensions 183 ...
Page 185: ...Inverter module cubicle with two R8i modules bottom cable exit Dimensions 185 ...
Page 186: ...Inverter module cubicle with three R8i modules bottom cable exit 186 Dimensions ...
Page 187: ...Brake chopper cubicle D150 Dimensions 187 ...
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