Definitions; Derating; Ambient Temperature Derating - ABB ACS880-07 Hardware Manual

198 Technical data

Definitions


U Nominal voltage of the drive. For the input voltage range, see section
N
specification on page 218.
I Nominal rms input current
1N
I Nominal output current (available continuously with no over-loading)
N
S Apparent power in no-ovarload use
N
P Typical motor power in no-overload use
N
I Continuous rms output current allowing 10% overload for 1 minute every 5 minutes.
Ld
P Typical motor power in light-overload use
Ld
I Maximum output current. Available for 10 seconds at start, then as long as allowed by drive
max
temperature.
I Continuous rms output current allowing 50% overload for 1 minute every 5 minutes.
Hd
* Continuous rms output current allowing 30% overload for 1 minute every 5 minutes.
** Continuous rms output current allowing 25% overload for 1 minute every 5 minutes.
*** Continuous rms output current allowing 40% overload for 1 minute every 5 minutes.
**** Continuous rms output current allowing 44% overload for 1 minute every 5 minutes.
***** Continuous rms output current allowing 45% overload for 1 minute every 5 minutes.
P Typical motor power in heavy-duty use
Hd
Note 1: The ratings apply at an ambient temperature of 40 °C (104 °F).
Note 2: To achieve the rated motor power given in the table, the rated current of the drive must be higher
than or equal to the rated motor current.
The DriveSize dimensioning tool available from ABB is recommended for selecting the drive, motor and gear
combination.
Note 3 – ACS880-07-0174A-7 amp rating: The drive can deliver 192 A continuously with no overload.
Note 4 – ACS880-07-0271A-7 power rating: The power rating is as per NEC Table 42.1. However, the drive
can be used for a typical 4-pole motor rated to 300 hp meeting NEMA MG 1 Table 12-11 minimum efficiency
standard (EPAct efficiency electrical motors) if motor full load current is not more than 271 A.

Derating

Ambient temperature derating


In the temperature range +40...50 °C (+104...122 °F), the rated output current is derated
by 1% for every added 1 °C (1.8 °F). The output current can be calculated by multiplying
the current given in the rating table by the derating factor (k):
k
1.00
0.90
0.80
+40 °C
+104 °F
T
+50 °C
+122 °F
Electrical power network