6 - ELECTRICAL CONNECTION
Please refer to the certified dimensional drawings, supplied with
the unit.
6.1 - Power supply
The power supply must meet the specification on the unit's
nameplate.
The supply voltage must be within the range specified in the
electrical data table.
For connections refer to the wiring diagrams and certified
dimensional drawings.
(1)
Operation of the unit with an incorrect supply
voltage or excessive phase imbalance constitutes
misuse which will invalidate the manufacturer's
warranty. If the phase imbalance exceeds 2% for
voltage, or 10% for current, contact your local
electricity supplier at once and ensure that the unit
is not switched on until corrective measures have
been taken.
After the unit has been installed, the power supply must only be
disconnected for quick maintenance operations (one day
maximum). For longer maintenance operations or when the unit
is taken out of service (for example, during winter when the unit
does not need to generate cooling) the power supply of the unit
must be maintained permanently.
6.2 - Voltage phase imbalance (%)
100 x max. deviation from average voltage
Average voltage
Example:
On a 400 V - 3 ph - 50 Hz power supply, the individual phase
voltages were measured with the following values: AB= 406V;
BC= 399V; AC= 394V
Average voltage = (406+399+394)/3
= 1199/3
= 399.7, rounded up to 400 V
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(CA) = 400 - 394 = 6
6.3 - Recommended cable sections
Wire sizing is the responsibility of the installer, and depends on
the characteristics and regulations applicable to each installation
site. The following is only to be used as a guideline, and does
not engage the manufacturer's liability.
After wire sizing has been completed, using the certified
dimensional drawing, the installer must verify the appropriate
means of connection and define any modifications necessary on
site.
The connections provided as standard for the customer-supplied
power supply cables are designed for the number and type of
wires listed in the table below.
The calculations of favourable and unfavourable cases are
performed by using the maximum possible current for each unit
fitted with a hydraulic kit (see the tables of electrical data notes
for the unit and the hydraulic module).
The study includes the standardised installation cases according
to IEC 60364: cables with PVC (70°C) or XLPE (90°C) insulation
with copper core; routing in accordance with table 52C of the
standard.
The maximum length mentioned is calculated to limit the voltage
drop to 5 %.
IMPORTANT: Before connecting the main power cables (L1
- L2 - L3), always check 3 phases are in the correct order
(clockwise) before proceeding to the connection on the main
disconnect switch.
Motor
AQUACIAT
POWER
ILD
EN-24
