ABB ACS880-77CC, Hardware Manual

Page: 52 / 128

conductor shall be determined in a manner which produces a conductance equivalent to
that which results from the application of this table.
Minimum cross-sectional area of the corresponding
protective conductor
S
p
(mm 2 )
Cross-sectional area of the phase conductors
S (mm
2
)
S S ≤ 16
16 16 < S ≤ 35
S/2 35 < S ≤ 400
200 400 < S ≤ 800
S/4 800 < S
Compared to a four-conductor system, the use of symmetrical shielded cable reduces
electromagnetic emission of the whole converter system as well as generator bearing
currents and wear.
The generator cable and its PE pigtail (twisted screen) should be kept as short as possible
in order to reduce electromagnetic emission as well as capacitive current.
￭
Typical power cable sizes
CE cables
Generator cables
Total quantity of parallel conductors per phase Conductor type Cable type Converter type
ACS880-77CC-
185 mm
2
240 mm
2
300 mm
2
2×10 2×9 2×6 Copper EPR 6880A/5500A-7
Grid cables
Total quantity of parallel conductors per phase Conductor type Cable type Converter type
ACS880-77CC-
185 mm 2 240 mm 2 300 mm 2
2×7 2×6 2×5 Copper EPR 6880A/5500A-7
DC resistor cables
Number of conductor pairs per DC chopper module Conductor
type Cable type Converter type
ACS880-77CC-
35 mm
2
2×1 Copper EPR 6880A/5500A-7
UL cables
Generator cables
Total quantity of parallel conductors per phase Conductor
type Cable type Converter type
ACS880-77CC-
350 kcmil 400 kcmil 500 kcmil 1000 kcmil
2×17 2×15 2×14 2×10 Copper EPR 6880A/5500A-7
Grid cables
Total quantity of parallel conductors per phase Conductor
type Cable type Converter type
ACS880-77CC-
350 kcmil 400 kcmil 500 kcmil 1000 kcmil
2×15 2×14 2×13 2×9 Copper EPR 6880A/5500A-7
52 Planning the electrical installation