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Electrical Installation Inspection
Complete and firm grounding of inverter.
Grid voltage matching the rated input voltage of inverter.
Correct phase sequence of grid connection, and tightening torque meeting requirements.
Correct connection of DC input anode and cathode, and tightening torque meeting requirements.
Correct connection of communication lines, and maintaining a certain distance to other cables.
Mechanical Installation Items Inspection
Other Inspections
All useless conductive parts tied with insulating ribbon.
No tools, spare parts, conductive dust generated from drilling or other matters left inside the cabinet.
No condensed humidity or icing inside the cabinet.
Table 4-8 Installation Inspection List
Pilot operation 5
The chapter will introduce the procedure of pilot operation, including checking
battery voltage, input and output connecting, other preparation working.
5.1 Relevant requirements
Before pilot operation, the installation conditions of the equipment shall be
examined thoroughly, in particular whether voltages at DC and AC ends are
consistent with inverter's requirements, and whether the polarity etc. are correct.
Inspect if the system connection meets requirements in relevant standards or codes
and if the system is grounded well.
CAUTION!
Before pilot operation, all switches at AC side and DC side shall
ensure to be cut off.
5.2 Inspection
5.2.1 Inverter inspection
Before power on the inverter, please carry out inspections as the following
procedures:
Step 1: Inspect inverter's installation and wiring conditions based on the Installation
Inspection List in Table 4-8;
Step 2: Ensure the AC&DC circuit breakers are cut off;
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.
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