9 Technical data
9.1 Electric cable size
Attention
The voltage on the compressor terminals must not deviate more than 10% from 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.
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 proper cable gland when
connecting the supply cable to the compressor.
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
EN60364-5-52 (Electrical installations of buildings - selection and erection equipment - current-
carrying capacities in wiring systems).
Standard conditions refer to:
Multi-core copper cables with 70˚C PVC or 90 °C XLPE/EPR insulation in cable conduits or cable
trunking systems (installation method B2) 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:
• Ambient temperature > 30 °C (86 °F).
• Cables in closed raceway, conduit or trunking system (installation method B2) at 46 °C
ambient temperature.
• Cables not grouped with other cables.
Instruction book
76 2920 7119 21
To Next Page
Loading...
Need help?
General
