Public low voltage networks. Symmetrically grounded TN-
S system, IT (ungrounded), corner-grounded delta, mid-
point-grounded delta and TT systems, see sections:
Network type
IEC: When to disconnect EMC filter or ground-to-phase
varistor: TN-S, IT, corner-grounded delta and midpoint-
grounded delta systems (page 132) and Guidelines for in-
stalling the drive to a TT system (page 134).
North America: When to connect EMC filter or disconnect
ground-to-phase varistor: TN-S, IT, corner-grounded delta
and midpoint-grounded delta systems (page 177) and
Guidelines for installing the drive to a TT system (page 178).
Note: Frames R4 and R5 cannot be used in corner-grounded
or midpoint-grounded delta systems.
Maximum allowable prospective short-circuit current is 65
kA when protected by fuses given in the fuse tables
Rated conditional short-circuit
current
I
cc
(IEC 61800-5-1)
US and Canada: The drive is suitable for use on a circuit
capable of delivering not more than 100 kA symmetrical
amperes (rms) at 480 V maximum when protected by fuses
given in the fuse table.
Maximum prospective short-
circuit current rating (SCCR)
(UL 61800-5-1, CSA C22.2 No.
274-17)
US and Canada: The drive is suitable for use on a circuit
capable of delivering not more than 65 kA symmetrical
amperes (rms) maximum when protected by circuit breakers
given in the circuit breaker table.
47 to 63 Hz. This is indicated in the type designation label
as typical input frequency level f1 (50/60 Hz).
Frequency (
f
1
)
Max. ± 3% of nominal phase to phase input voltageImbalance
0.98 (at nominal load)Fundamental power factor
(cos phi
1
)
Technical data 343
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