11.2 Electric cable size
Important warning
The compressor is delivered with 3 m (10 ft.) cable and cable gland. This cable gland is
necessary to ensure the protection degree of the electric cubicle and to protect its
components from dust from the environment.
•
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.
•
Local regulations remain applicable if they are stricter than the values proposed below.
IEC versions
For IEC designed control panels, the below suggested cable sections are calculated according to 60364-5-52
electrical installations of buildings, part 5: selection and erection equipment, section 52: current-carrying
capacities in wiring systems.
Standard conditions refer to loose copper conductors or multicore cable with 70˚C PVC insulation in free
air or on open cable trays (installation method C) at 30˚C ambient temperature and operating at nominal
voltage. The cables may not be grouped with other power circuits or cables.
Worst case conditions refer to loose copper conductors or multicore cable with 70˚C PVC insulation, but
with ambient temperature above 30˚C (86 ˚F), cables in closed raceway, conduit or trunking system
(installation method B2), or with cables grouped with other cables.
Fuse calculations for IEC are done according to 60364-4-43 electrical installations of buildings, part 4:
protection for safety- section 43: protection against overcurrent. Fuse sizes are calculated in order to protect
the cable against short circuit. Fuse type aM is recommended but gG/gL is also allowed.
Instruction book
160 2920 7090 51
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