Carrier 30XW - 5 Electrical Connection; Power Supply; Voltage Phase Imbalance (%); Power Connection;Disconnect Switch

16

Please refer to the certied dimensional drawings, supplied
with the unit.

The power supply must conform to the specication on the
unit nameplate. The supply voltage must be within the range
specied in the electrical data table. For connection details
refer to the wiring diagrams.
WARNING: Operation of the unit with an improper supply
voltage or excessive phase imbalance constitutes abuse which
will invalidate the Carrier 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.

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 to be:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406 + 399 + 394)/3 = 1199/3
= 399.7 say 400 V
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 is therefore acceptable.

Units Connection points
30XW 252-862 1 per unit
30XW 1002-1762 1 for circuit A
1 for circuit B

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 guide-
line, and does not make in any way liable. After wire sizing
has been completed, using the certied dimensional drawing,
the installer must ensure easy connection and dene any
modications necessary on site.
The connections provided as standard for the eld-supplied
power entry cables to the general disconnect/isolator switch
are designed for the number and type of wires, listed in the
second column of the table on the next page.
The calculations for favourable and unfavourable cases are
based on the maximum current for each unit (see electrical
data tables). The design uses the standardised installation
methods in accordance with IEC 60364: multiconductor
PVC (70°C) or XLPE (90°C) insulated cables with copper
core; arrangement to comply with table 52c of the above
standard. The maximum temperature is 42°C. The given
maximum length is calculated to limit the voltage drop to 5%.

• As standard:
 30XW254to862unitshaveasinglepowerconnectionpointlocated
immediatelyupstreamofthemaindisconnectswitch.
 30XW1002to1762unitshavetwoconnectionpointslocatedimmediately
upstreamofthemaindisconnectswitches.
• Thecontrolboxincludesthefollowingstandardfeatures:
- One main disconnect switch per circuit*
- Starter and motor protection devices for each compressor
- Anti-short cycle protection devices*
- Control devices
• Field connections:
 Allconnectionstothesystemandtheelectricalinstallationsmustbeinfull
accordancewithallapplicablecodes.
• TheCarrier30XWunitsaredesignedandbuilttoensureconformancewith
localcodes.TherecommendationsofEuropeanstandardEN60204-1
(correspondstoIEC60204-1)(machinesafety-electricalmachine
components-part1:generalregulations)arespecicallytakenintoaccount,
whendesigningtheelectricalequipment.
• Theabsenceofpowersupplydisconnectswitch(es)andshort-cycleprotection
devicesinoption82Aisanimportantfactorthathastobetakenintoconsidera-
tionattheinstallationsite.
 Unitsequippedwithoneofthesetwooptionsaresuppliedwithadeclarationof
incorporation,asrequiredbythemachinerydirective.

• GenerallytherecommendationsofIEC60364areacceptedascompliance
withtherequirementsoftheinstallationdirectives.ConformancewithEN
60204-1isthebestmeansofensuringcompliancewiththeMachinesDirective.
• AnnexBofEN602041describestheelectricalcharacteristicsusedforthe
operationofthemachines.
1. Theoperatingenvironmentforthe30XWunitsisspeciedbelow:
• Environment**EnvironmentasclassiedinEN60721(correspondstoIEC60721):
- indoor installation
 - ambienttemperaturerange:minimumtemperature+5°Cto+42°C,class
AA4
- altitude: lower than or equal to 2000 m
 - presenceofwater:classAD2(possibilityofwaterdroplets)
 - presenceofhardsolids,class4S2(nosignicantdustpresent)
 - presenceofcorrosiveandpollutingsubstances,class4C2(negligible)
- personal skills: BA4 (informed person)
2. Powersupplyfrequencyvariation:±2Hz.
3. Theneutral(N)linemustnotbeconnecteddirectlytotheunit(ifnecessaryuse
atransformer).
4. Overcurrentprotectionofthepowersupplyconductorsisnotprovidedwiththe
unit.
5. Thefactoryinstalleddisconnectswitch(es)/circuitbreaker(s)is(are)ofatype
suitableforpowerinterruptioninaccordancewithEN60947-3(correspondsto
IEC60947-3).
6. TheunitsaredesignedforconnectiontoTNnetworks(IEC60364).ForIT
networkstheearthconnectionmustnotbeatthenetworkearth.Providealocal
earth,consultcompetentlocalorganisationstocompletetheelectricalinstallation.
 


* Not provided for units equipped with option 82A
** TherequiredprotectionlevelforthisclassisIP21BorIPX1B(accordingto
referencestandardIEC60529).All30XWunitsfullthisprotectioncondition.In
generalthecasingsfullclassIP23orIPX3B.
Motor
A
B
C