ABB ACS800-U4 User Manual

Resistor braking
132
Note: A resistor other than the standard resistor can be used provided that:
• its resistance is not lower than the resistance of the standard resistor.
• the resistance does not restrict the braking capacity needed, i.e.
where
• the heat dissipation capacity (E
R
) is sufficient for the application (see step 3
above).
WARNING! Never use a brake resistor with a resistance below the value specified
for the particular drive / brake chopper / resistor combination. The drive and the
chopper are not able to handle the overcurrent caused by the low resistance.
Optional brake chopper and resistor(s)
The nominal ratings for dimensioning the brake resistors are given below at an
ambient temperature of 40°C (104°F).
P
max
maximum power generated by the motor during braking
U
DC
voltage over the resistor during braking, e.g.
1.35 · 1.2 · 415 V DC (when supply voltage is 380 to 415 V AC),
1.35 · 1.2 · 500 V DC. (when supply voltage is 440 to 500 V AC) or
1.35 · 1.2 · 690 V DC (when supply voltage is 525 to 690 V AC).
R resistor resistance (ohm)
ACS800-04 type
ACS800-U4 type
Braking power of the chopper and
the drive
Brake resistor(s)
P
brcont
(kW)
Type R
(ohm)
E
R
(kJ)
P
Rcont
(kW)
230 V units
-0001-2 0.55 SACE08RE44 44 210 1
-0002-2 0.8 SACE08RE44 44 210 1
-0003-2 1.1 SACE08RE44 44 210 1
-0004-2 1.5 SACE08RE44 44 210 1
-0005-2 2.2 SACE15RE22 22 420 2
-0006-2 3.0 SACE15RE22 22 420 2
-0009-2 4.0 SACE15RE22 22 420 2
-0011-2 5.5 SACE15RE13 13 435 2
-0016-2 11 SAFUR90F575 8 1800 4.5
-0020-2 17 SAFUR90F575 8 1800 4.5
-0025-2 23 SAFUR80F500 6 2400 6
-0030-2 28 SAFUR125F500 4 3600 9
-0040-2 33 SAFUR125F500 4 3600 9
-0050-2 45 2xSAFUR125F500 2 7200 18
-0060-2 56 2xSAFUR125F500 2 7200 18
-0070-2 68 2xSAFUR125F500 2 7200 18
P
max
<
U
DC
R
2
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ABB ACS800-U4 Specifications

General

Brand	ABB
Model	ACS800-U4
Category	Controller
Language	English