Hypontech HPT Series, User Manual

Page: 17 / 32

17 HPT USER MANUAL
7. START UP AND OPERATION
7.1 Safety Check Before Start Up
Please check before switching on any voltage resources connected to the inverter and
closing inverter’s DC switch:
1. Grid Voltage: Check the grid voltage at point of connection at the inverter complies
with permitted range of the inverter.
2. Mounting Bracket: Check if the mounting bracket is properly and securely installed.
3. Mounting of the inverter: Check if the inverter is properly mounted and attached to
the mounting bracket.
4. DC Connectors: Check if the DC connectors are installed correctly on terminals.
5. AC Connectors and Wire Assembly: Check if wires are assembled correctly on the AC
side and if the AC connector is properly and securely installed. Check if the AC
connector is firmly plugged into AC terminal.
6. Cables: Check if all cables are reliably connected. Check if the connections are
effective, while the insulations are undamaged.
7. Groundings: Check all groundings using multimeter and if all exposed metal parts of
the inverter are properly grounded.
8. DC Voltage: Check if the largest open-circuit voltage of PV arrays complies with the
permitted range.
9. DC Polarity: Check if the wires from DC voltage resource are connected to terminals
with correct polarity.
10. Grounding Resistance: Check if the grounding resistance of PV strings >1MOhm using
a multimeter.
After all installation and checks, close the AC circuit-breaker, then the DC switch. The
inverter will start to operate when DC input voltage and grid conditions meet the
requirements of inverter startup.