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MAINTENANCE AND OPERATING MANUAL
Chapter 5 - Installation
The data inside this manual are not binding and they can be modified by the manufacturer without notice.
All rights reserved.
TAEevo015÷351
5 . 6
E l e c t r i c a l c o n n e c t i o n s
The connection of the unit to the power supply network must be done in conformity with the laws and prescriptions in force in the installation
place.
The power supply voltage, the frequency and the phase number must be as shown on the unit data plate.
The power supply voltage must not be, also for short periods, out of the tolerances given in the wiring diagram.
Except for different indications, the frequency tolerance is +/-1% of the nominal value (+/-2% for short periods).
In the event of three-phase supply, the system must be symmetrical (equal effective voltage values and equal phase angles among consecutive
phases).
In particular, except for different indication, the max. unbalance between each phase is 2%. The unbalance is calculated as following:
Vavg
= average of voltage phases
In the event of single-phase supply, check that there is a neutral line in the electrical installation and it is earthen in the transformer cabin (TN
system in compliance with IEC 364) or that this is done by the electricity supply company (TT system in compliance with IEC 364).
The phase conductor and the neutral wire must not be confused.
For the electrical supply:
1.
connect the unit (PE terminal in the electrical panel) to the earthed system of the building
2.
guarantee the automatic interruption of the power supply in the event of insulation failure (protection against indirect contacts in
compliance with IEC 364) by means of a differential device (normally with operation nominal current of 0.03 A)
3.
at the beginning of the electrical supply cable must be guaranteed a protection against direct contacts with a protection degree of
IP2X or IPXXB at least
4.
at the beginning of the electrical supply cable must be installed protection devices that protect against overcurrents (short circuit)
(see information in the electrical wiring)
5.
use conductors which transform the max. current required to the max. operating ambient temperature, according to the selected
installation type (IEC 364-5-523) (see information in the electrical wiring)
6.
protection devices must be installed to limit the short circuit current to peaks of 17 kA corresponding to the specified interruption
power if the short circuit current envisaged at the point of installation is greater than an effective value of 10 kA.
Indications of electrical wiring:
A max. size permitted for the fuse type gG.
In general, the fuses can be replaced with an automatic switch regulated by means of the unit max. absorbed current (contact the
manufacturer if necessary)
B
section and type of the power supply cable (if not already supplied):
•
installation: insulated conductors, multipolar cable in duct, in air or over masonry (C type in compliance with IEC 364-5-523
1983) or without no other cable in contract
•
working temperature: the max. working ambient temperature of the unit
•
cable type: copper conductors, PVC insulation from 70°C (if not specified) or EPR insulation from 90°C
Consult the enclosed electrical diagram for additional information.
Max difference of each phase from Vavg
Vavg
x100
Summary of Contents for TAEevo015
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