8.2 Electric cable size and fuses
Important
• 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.
• Use the original cable entry. See section Dimension drawings.
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 fitting
cable gland when connecting the supply cable to the compressor.
Use single core cables in conduit if two multicore cables do not fit in the supply
cable entrance.
• 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 IEC 60204
table 10.
Currents and fuses
UL/cUL approval
Compressor type I (1) Max. fuse (1) I (2) Max. fuse (2)
K5/
HRC form II
K5/
HRC form II
V Hz A A A A
QGD 40 230 60 298.2 350 306.2 350
QGD 40 380 50 176.8 200 180.9 200
QGD 40 380 60 179.4 200 184.2 200
QGD 40 460 60 149.4 175 153.5 175
QGD 40 575 60 120.4 150 124.0 150
Instruction book
98 2920 7190 02
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