Symbols; Sizing; Derating; Fuses - ABB ACS800 Hardware Manual

120
3)
50% overload is allowed for one minute every five minutes if ambient temperature is less than
30 °C. 40% overload is allowed if ambient temperature is 40 °C.
4)
available if ambient temperature is less than 30 °C (86 °F). If ambient temperature is 40 °C
(104 °F), I
*
higher value available if output frequency is above 41 Hz
**
ACS800-U2 types only

Symbols

I
max
Normal use (10% overload capability)
I
2N
P
N
Heavy-duty use (50% overload capability)
I
2hd
P
hd
Note: The ratings apply at an ambient temperature of 40 °C (104 °F). At lower temperatures the ratings
are higher.

Sizing

See page 111.

Derating

See page 111.

Fuses

UL class T or L fuses for branch circuit protection per NEC are listed below. Fast
acting class T or faster fuses are recommended in the USA.
Check from the fuse time-current curve that the operating time of the fuse is
below 0.1 seconds. The operating time depends on the supply network impedance
and the cross-sectional area and length of the supply cable. The short-circuit current
can be calculated as shown in section
Technical data
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
is 704 A.
2N
maximum output current. Available for 10 s at start, otherwise as long as allowed by drive
temperature.
continuous rms current. 10% overload is typically allowed for one minute every 5 minutes.
typical motor power. The power ratings apply to most 4-pole NEMA rated motors (230 V,
460 V or 575 V).
continuous rms current. 50% overload is typically allowed for one minute every 5 minutes.
typical motor power. The power ratings apply to most 4-pole NEMA rated motors (230 V,
460 V or 575 V).
Fuses on page 112.