MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
90/
139
Rev. 03
– 01/06//2018
The SPDs are referenced to in the Electrical and Mechanical Diagram as 30A1 and 30A2 (in the inverters
equipped with two DC modules).
Each SPD is protected by an integrated thermal circuit breaker against voltage surge.
The thermal circuit breaker signalling mode may be programmed as follows:
•
The thermal circuit breaker trips and a WARNING fires, that does not stop the inverter; the inverter
may start or may be kept running (default setting);
•
The thermal circuit breaker trips and an ALARM trips, that stops the inverter.
The status signalling of the AC-side SPDs is shared with the DC-side SPDs.
8.9.
AC insulation check
The AC Insulation Check allows detecting insulation loss between the AC terminals of the inverter and the
LV/MV transformer. Insulation check is a continual check.
The AC insulation check may be programmed as follows:
•
The control unit trips and a WARNING fires, that does not stop the inverter; the inverter may start or
may be kept running (default setting);
•
The control unit trips and an ALARM trips, that stops the inverter.
8.10.
Compatibility with single secondary for multi-MPPT products
The SUNWAY TG TE inverters configured with multiple MPPTs may be connected to a single winding of
the LV/MV transformer, provided that the
Compatibility with Single Secondary for Multi-MPPT Products
option
is installed.
This option consists of the following:
•
De-coupling inductors between the AC outputs related to independent MPPTs
•
Synchronisation system between the conversion modules related to independent MPPTs
8.11.
Self-power supply
The SUNWAY TG TE require 230 V
AC
(+/- 10%) auxiliary power supply.
If an external power supply source is available, it can be shunted directly internally to the cabinet by way of
the
Self-power Supply Option
.
WARNING
When the Self-power Supply is installed, it is forbidden to connect an external power
supply source.
8.12.
String monitoring
The
String Monitoring
option is required for the communication to the Smart String Box trunks.
The String Monitoring option implements galvanic isolation of RS-485 serial port available on the data
Logger board for communication to Slave devices (COM1). Connection to RS-485 bus is done via the DC.X9
terminal board on each DC module. The line terminations are inserted as a factory setting.
For details on the RS-485 connection, please refer to section 7.3.3.
230Vac 10A auxiliary power supply is also available to power supply the control circuits of the string boxes
(see 6.5.3).
8.13.
Independent output power measurement (wattmeter)
A wattmeter and its relevant CT and VT may be installed on the AC output related to each independent
MPPT. All the measurements are made available via Modbus RTU RS-485 protocol only and may be
integrated with Santerno
’s remote monitoring system.
