Electrical Connection; Power Supply; Voltage Phase Imbalance (%); Recommended Wire Sections - Carrier AQUASNAP 30RBM Series Installation, Operation And Maintenance Instructions

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.
WARNING:
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 started up, the power supply must only
be disconnected for quick maintenance operations (one day
maximum). For longer maintenance operations or when the unit
is placed in storage (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 supply, the individual phase voltages
were measured with the following values:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406 + 399 + 394)/3
= 1199/3
= 399.7 (rounded up to 400 V)
Table of minimum and maximum cable sections (per phase) for connection to the units
Max. connectable section
30RBM/30RBP Standard Narrow lug Recommended
lug
mm² mm²
(per phase) (per phase)
160 2x70 2x95
180 2x70 2x95
200 2x70 2x95
220 2x70 2x95
260 2x70 2x95
300 2x70 2x95
330 2x95 2x185
360 2x95 2x185
400 2x95 2x185
430 2x95 2x185
470 2x240 2x240
520 2x240 2x240
NOTES:
(1) Connection capacities actually available for each machine. These are defined according to the connection terminal size, the electrical box access opening dimensions and the available space inside
the electrical box.
(2) Selection simulation result considering the hypotheses indicated.
(3) If the maximum calculated section is for an XLPE cable type, this means that a selection based on a PVC cable type can exceed the connection capacity actually available. Special attention must be
given to selection.
The protection against direct contact at the electrical connection point is compatible with the addition of fanout cables. The installer must determine whether these are necessary based on the cable
sizing calculation.
24
Calculation of favourable case:
(1)
- Suspended overhead line (standardised routing
no. 17)
- Cable with XLPE insulation
Section
(2)
max lug width
mm mm²
(per phase)
21 1 x 50
21 1 x 50
21 1 x 70
21 1 x 70
21 2 x 50
21 2 x 50
24,5 2 x 70
24,5 2 x 70
24,5 2 x 70
24,5 2 x 95
37 2 x 95
37 2 x 120
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(CA) = 400 - 394 = 6
The maximum deviation from the average is 6 V. The greatest
percentage deviation is: 100 x 6/400 = 1.5 %
This is less than the permissible 2% and therefore acceptable.

6.3 - Recommended wire 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 current possible for each
unit fitted with a hydraulic module (see the tables of electrical
data 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.
Max length for a Cable type
(3)
voltage drop < 5%
m -
180 XLPE Copper 2 x 50
170 XLPE Copper 2 x 50
205 XLPE Copper 2 x 70
190 XLPE Copper 2 x 70
220 XLPE Copper 2 x 70
200 XLPE Copper 2 x 70
240 XLPE Copper 2 x 95
220 XLPE Copper 2 x 95
200 XLPE Copper 2 x 120
240 XLPE Copper 2 x 150
220 XLPE Copper 2 x 150
240 XLPE Copper 2 x 185
Motor
Calculation of unfavourable case:
- Conductors in ducts or multi-conductor cables in
closed conduits (standardised routing no. 41)
- Cable with PVC insulation, if possible
Section Max length for a
(2)
voltage drop < 5%
mm² m
(per phase)
350
320
380
350
300
270
310
280
310
340
320
330
Cable type
(3)
-
PVC Copper
PVC Copper
PVC Copper
PVC Copper
XLPE Copper
XLPE Copper
XLPE Copper
XLPE Copper
XLPE Copper
XLPE Copper
XLPE Copper
XLPE Copper