Electric Cable Size And Fuses - Atlas Copco GA 37 VSD Instruction Book

9.2

Electric cable size and fuses

Important
Currents and fuses
UL/cUL approval
Compressor type
GA 37 VSD
I: current in the supply lines at maximum load and nominal voltage
(1): compressors without integrated dryer
(2): compressors with integrated dryer
(3): fuse type for compressors with Control Technics converter
(4): fuse type for compressors with Neos converter
Fuse calculations for UL/cUL: the indicated fuse size is the maximum fuse size in order to
protect the motor against short circuit.
116
• The voltage on the compressor terminals must not deviate more than 10% of the
nominal voltage.
It is however highly recommended to keep the voltage drop over the supply cables
at nominal current below 5% of the nominal voltage (IEC 60204-1).
• If cables are grouped together with other power cables, it may be necessary to use
cables of a larger size than those calculated for the standard operating conditions.
• The cable size is limited between 50 and 95 mm² (see table).
• Use the original cable entry. See section
To preserve the protection degree of the electric cubicle and to protect its
components from dust from the environment, it is mandatory to use a proper
cable gland when connecting the supply cable to the compressor.
• Local regulations remain applicable if they are stricter than the values proposed
below.
• Currents are calculated with the full service factor but we suggest to add 10% due
to over- and under-voltage.
Fuses are maximum allowed values calculated for full service factor and 10%
over- and under-voltage.
• Caution:
• Always double-check the fuse size versus the calculated cable size. If
required, reduce fuse size or enlarge cable size.
• Cable length should not exceed the maximum length according to IEC60204
table 10
V Hz
460 60
Dimension
I (1) Max fuse (1)
HSJ K5/
(3) HRC form
JJS II
(4)
A A A
63.9 80 -
Instruction book
drawings.
I (2) Max fuse (2)
HSJ K5/
(3) HRC form
JJS II
(4)
A A A
67.5 80 -
API480496