Optional Brake Chopper And Resistor(S) For The Acs800-U2, Acs800-U4, Acs800-Pc And Acs800-07/U7; Resistor Installation And Wiring - ABB ACS800 Hardware Manual

96
• The resistance does not restrict the braking capacity needed, i.e., 
where
P
max
U
DC
R
• The heat dissipation capacity (E
above).
Optional Brake Chopper and Resistor(s) for the ACS800-U2, ACS800-U4,
ACS800-PC and ACS800-07/U7
The nominal ratings for dimensioning the brake resistors for the ACS800-U2,
ACS800U4, ACS800-PC and ACS800-07/U7 are given below at an ambient
temperature of 40 °C (104 °F).
ACS800 type Duty Cycle=3s on, 27s off
kVA Frame Part No
0170-5 R7 ABB-48431-271
0210-5 R7 ABB-48431-271
0260-5 R7 ABB-48431-271
0320-5 R8 ABB-48431-331
0400-5 R8 ABB-48431-393
0440-5 R8 ABB-48431-480
0490-5 R8 ABB-48431-514
0550-5 R8 ABB-48431-514
0610-5 R8 ABB-48431-515

Resistor Installation and Wiring

All resistors must be installed outside the drive module in a place where they will
cool.
WARNING! The materials near the brake resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. Protect the resistor against contact.
Use the cable type used for drive input cabling (refer to chapter Technical Data) to
ensure the input fuses will also protect the resistor cable. Alternatively, two-
conductor shielded cable with the same cross-sectional area can be used. The
maximum length of the resistor cable(s) is 10 m (33 ft). For the connections, see the
power connection diagram of the drive.
Resistor Braking
2
U
DC
P
max <
R
maximum power generated by the motor during braking
voltage over the resistor during braking, e.g.,
1.35 · 1.2 · 415 VDC (when supply voltage is 380 to 415 VAC),
1.35 · 1.2 · 500 VDC. (when supply voltage is 440 to 500 VAC) or
1.35 · 1.2 · 690 VDC (when supply voltage is 525 to 690 VAC).
resistor resistance (ohm)
Rohm Watts
2.9 14.2k ABB-48431-272
2.9 14.2k ABB-48431-273
2.9 14.2k ABB-48431-273
2.2 17.8k ABB-48431-332
1.7 24.5k ABB-48431-395
1.2 32.7k ABB-48431-482
1.0 34.2k ABB-48431-517
1.0 34.2k ABB-48431-517
1.0 40.0k ABB-48431-518
) is sufficient for the application (see step 3
R
Duty Cycle=10s on, 50s off
Part No Rohm Watts
2.9 16.3k
2.9 23.5k
2.9 23.5k
2.2 26.6k
1.7 46.3k
1.2 60.8k
1.0 67.6k
1.0 67.6k
1.0 90.0k
Duty Cycle=30s on, 180s off
Part No Rohm
ABB-48431-273 2.9
ABB-48431-274 2.9
ABB-48431-274 2.9
ABB-48431-334 2.2
ABB-48431-396 1.7
ABB-48431-484 1.2
ABB-48431-518 1.0
ABB-48431-518 1.0
ABB-48431-518 1.0
Watts
23.5k
29.0k
29.0k
40.1k
58.1k
81.1k
90.0k
90.0k
90.0k