MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
88/
139
Rev. 03
– 01/06//2018
Installation of the
Soft Grounding
option modifies the electrical status of the field conductors which could
therefore be at a hazardous potential from earth. It is therefore necessary to adopt measures to guarantee
personnel safety.
Even under no-fault conditions, in case of inadvertent contact with the positive pole, a fault loop occurs,
supplied by the PV field, that closes through the
Soft Grounding
resistor
and the operator’s body. The fault
current is limited only by the series resistance of the operator's body and of the
Soft Grounding
resistor. The
resulting current may harm the operator.
Figure 58: Direct contact with live pole (even under no-fault conditions)
WARNING
The isolation to earth control of the PV field poles is NOT active.
In addition, the grounded pole may be at a dangerous potential with respect to ground. In case of inadvertent
contact with the negative pole, a fault loop occurs, supplied by the PV field, that closes through the
Soft
Grounding
resistor
and the operator’s body. The fault current is limited only by the series resistance of the
operator's body and of the
Soft Grounding
resistor. The resulting current may harm the operator.
Figure 59: Direct contact on a soft grounded pole
8.6.
Zone monitoring
The following functions are available:
•
Current measurement of each DC input
•
Processing of the detected measurements in order to detect underperforming or open inputs.
The system is integrated with the remote monitoring system, so data may be accessed via Ethernet.
