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INSTALLATION GUIDE
MODULAR SUNWAY TG
TE OD
Rev. 03
– 01/06/2018
37/
139
6
130 KΩ
7
160 KΩ
8
POS EARTHED
9
NEG EARTHED
Table 4: Rotary switch position
The board is fitted with an AUTO-
TEST button. When button “P1” is kept pressed for 10 seconds, an isolation
leakage alarm is simulated for 30 seconds. During the test the board’s self-diagnostics LEDs (L3, L4) flash
slowly.
NOTE
The PV field voltage must be greater than the minimum MPPT voltage when executing the
autotest.
The factory setting envisages an isolation resistance of 100 k
(
10%) for PV fields that are not earthed.
Settings 8 and 9 are to be used when the PV field is positive or negative earthed and the EGFD option is
not present (see section 8.3); in that case, the rotary switch is set to 30kOhm.
WARNING
Before performing any operation inside the cabinet, follow the instructions given in
section 2.7.
4.6.2. Earthed PV field
If the Earth Option is installed, the dedicated option for the PV field insulation detection is required (see
section 8.1).
The fuse blown signal is available when the Earthed PV field option is installed.
Fuse blowing may be programmed as follows:
•
When the fuse blows, a WARNING fires, that does not stop the inverter; the inverter may start or may
be kept running (default setting).
•
When the fuse blows, that triggers an alarm locking the inverter (default setting).
•
The fuse blown is ignored (default setting for the configuration without the
Earthed Option
).
See the Programming Guide, Alarm Autoreset menu.
4.7.
Surge protection
4.7.1. DC-side protection
The SUNWAY TG TE inverters are protected from power surges on the PV field input by appropriate Class
II SPDs (Surge Protective Devices), suitable for protecting the equipment from indirect discharges.
The “Y” configuration has been adopted which is perfectly compatible with Earthed or floating PV field plants
(please refer to section 8.1).
The SPDs are referred to in the Electrical and Mechanical Diagram using the component ID codes 11AP1
and are located in each DC section.
Each SPD is protected by an integrated MCCB (Moulded Case Circuit Breaker) against any overload of the
component.