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5.2 Inspection
5.2.1 Inverter inspection
Before power on the inverter, please carry out inspections as the following procedures:
Procedure 1
:
Inspect inverter's installation and wiring conditions based on the
Installation Inspection List in Table 4-6;
Procedure 2
:
Ensure the AC&DC circuit breakers are cut off;
Procedure 3
:
Ensure the emergency button is available and woks normally.
5.2.2 Grid voltage inspection
●
Inspect whether the three phases of the inverter is correctively connected with the three phase
sequence of the grid.
● Inspect whether the line voltage and frequency are within the prescribed range, and record the
value.
● If possible, measure the phase THD (Total Harmonic Distortion), and inspect the curve. If
distortion is serious, the inverter may fail to operate.
5.2.3 DC side voltage inspection
The DC side shall be connected to the inverter from the Combiner or DC distribution cabinet.
● Ensure correct DC input polarity.
● Measure and record the DC (open-circuit) voltage of each line. Voltages of each line shall be
similar, and less than the permitted maximum DC voltage value.
5.3 Power on steps
●
First power-on
Operation procedures for the first power-on and operation of inverter are as follows:
Procedure 1: Screw the handle of circuit breaker at the AC side to "ON" position.