Characteristics And Sizing Of The Line Cable - ABB PVS-120-TL Quick Installation Manual

9.
ABB inverters must be earthed via the connection points marked with the protective earth symbol
cross-section for the maximum ground fault current that the generating system might experience. In any case the minimum cross section of the
ground conductor must be at least 1/2 of phase conductor cross section.
Any failure of the inverter when it is not connected to earth through the appropriate connection point is not covered by the warranty.
The ground connection can be made through the Protective earth point (int.)
tions in force in certain countries of installation).
The sizing of the ground cable depend on the choice of the protective earth point (internal
Cable diameter range
Max. conductor cross section
Cable lug dimensioning
10.
Load protection breaker (AC disconnect switch)
To protect the AC connection line of the inverter, an overcurrent protection device with the following features can be installed (these are the caracteri-
stic of a load protection switch referred to a single inverter installation):
Type
Voltage rating
Current rating
Magnetic protection characteristic
Number of poles
In case of installation of a residual current protection device must meet the following characteristics:
Type of differential protection
Differential sensitivity
ABB declares that the ABB transformerless inverters, in terms of their construction, do not inject continuous ground fault currents and therefore
there is no requirement that the differential protection installed downstream of the inverter be type B in accordance with IEC 60755 / A 2.

Characteristics and sizing of the line cable

The cross-section of the AC line conductor cables must be sized in order to prevent
unwanted disconnections of the inverter from the grid due to high impedance of the line
that connects the inverter to the power supply; If the impedance is too high it causes an
increase in the AC voltage which, on reaching the limit set by the standards in the country of
installation, causes the inverter to switch off.
The AC connection busbars
using appropriate bi-metallic cable lug.
Protective earth point (int.)
10 - 17 mm
for M10 Stud
a = 10.5 mm (min)
b = 40 mm (max)
PVS-100-TL
Automatic circuit breaker with differential thermal-magnetic protection
400 Vac
min. 150 A
PVS-100-TL
1.0 A
The AC cables must be connected to AC connection busbar
for installation on the M10 screw used for securing the cable.
The AC output cable lugs must meet the following dimensions:
a = 10.5 mm (min) b = 40 mm (max)
are in copper tin-plated; therefore if aluminum cables are used, the correct coupling with the copper bars must be guaranteed by
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, Protective earth point (ext.)
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or external
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95 mm²
B/C
3/4
A/AC
max 185 mm²
19 - 28 mm
using a cable lug (not supplied) of a suitable size
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- 16 -
and using a cable with an appropriate conductor
or both (this is required by regula-
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) where it will be connected:
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Protective earth point (ext.)
-
-
for M8 Stud
a = 8.4 mm (min)
b = all dimension accepted
PVS-120-TL
480 Vac
min. 150 A
PVS-120-TL
1.2 A
max 185 mm²
(each cable)
34 - 45 mm
or
37 - 53 mm
(depending on
AC cable gland)
EN
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