Symbols; Input Cable Fuses - ABB ACS800 Hardware Manual

90
3)
50 % overload is allowed for one minute every five minutes if ambient temperature is less than
30 °C (86 °F). 40 % overload is allowed if ambient temperature is 40 °C (104 °F).
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-U4 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 ambient temperature of 40 °C (104 °F). At lower temperatures the ratings
are higher.

Input cable fuses

The recommended fuses are for branch circuit protection per NEC. The fuses restrict
drive damage and prevent damage to adjoining equipment in case of a short-circuit
inside the drive. Check that the operating time of the fuse is below 0.5 seconds
and the fuses are of the "non-time delay" type . The operating time depends on
the fuse type (T/L or aR), supply network impedance and the cross-sectional area,
material and length of the supply cable. In case the 0.5 seconds operating time is
exceeded with T/L fuses, ultrarapid (aR) fuses will in most cases reduce the
operating time to an acceptable level. The fuses must be of the "non-time delay"
type. See also Planning the electrical installation /
circuit
Note 1: In multicable installations, install only one fuse per phase (not one fuse per conductor).
Note 2: Larger fuses must not be used.
Note 3: Fuses from other manufacturers can be used if they meet the ratings.
Technical data
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).
protection.
Thermal overload and short-