Electrical Connection; Pv Connection - LIVOLTEK GT1-2K5D2 User Manual

6 Electrical Connection

This chapter mainly describes the cable connections of the system.
Prior to any electrical connections, keep in mind that the inverter has
dual power supplies. It is mandatory for the qualied personnel to wear
personal protective equipments (PPE) during the electrical work.
DANGER
Danger to life due to a high voltage inside the inverter!
• The PV string will generate lethal high voltage when exposed to sunlight.
• Before starting electrical connections, disconnect the DC and AC circuit
breakers and prevent them from inadvertent reconnection.
• Ensure that all cables are voltage free before performing cable
connection.
WARNING
• Any improper operations during cable connection can cause device
damage or personal injury.
• Only qualied personnel can perform cable connection.
• All cables must be rmly attached, undamaged, properly insulated
and adequately dimensioned.
NOTICE
• Comply with the safety instructions related to the PV strings and the
regulations related to the utility grid.
• All electrical connections must be inaccordance with local and national
standards.
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6.1 PV Connection

Please only use the PV connectors from the accessory box for connection.
Before connecting, please make sure:
• The voltage, current and power ratings of the panels to be connected
within the allowable range of the inverter. Ensure polarity is correct.
Please refer to the Technical Data in chapter 9 for voltage and current
limits.
• Since the inverter is transformerless, please do not ground either output
of the PV panels. Ground the panel frames.
• Before connecting to PV modules, please install separately a DC circuit
breaker between inverter and PV modules.
• To avoid any malfunction, do not connect any PV modules with possible
current leakage to the inverter. For example, grounded PV modules will
cause current leakage to the inverter. When using CIGS modules,
please be sure NO grounding.
•
If the inverter is equipped with a three-level lightning protection device,
It's requested to use PV junction box with surge protection. Otherwise, it
will cause damage on inverter when lightning occurs on PV modules.
Procedure
Model Wire Size
10AWG
2.5~6.0kW
10AWG
7.0~10.0kW
WARNING
• Use IEC61730 class-A Rating PV modules.
• When exposed to light, PV panels will generate DC voltage.
• Turn off the DC circuit breaker before connecting any wiring.
• All wiring must be performed by a qualied personnel.
• It's very important for system safe ty and efcient operation to use
appropriate cable for PV module connection. To reduce risk of injury,
please use the proper recommended cable size as below
Cable
4-6m²
4-6m²
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