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7.2.2 Checking the PCS
Check the PCS before powering on it:
• Ensure the AC and DC switches are disconnected.
• Ensure that the maintenance switch (Q1) and AC switch (Q3) are closed.
• Ensure the START/STOP switch is at the START position and can work normally.
• Ensure the emergency stop button is released and can work normally.
• Check and ensure the switches and buttons of the PCS and upstream and downstream
devices meet the requirement and work normally.
7.2.3 Checking Batteries
Make sure the measuring devices are connected and used correctly. There will be
electric arc if otherwise.
DC side voltage should not exceed the PCS maximum allowable DC input voltage.
Too high DC voltage may damage the PCS, and even cause safety incident.
Ensure the polarity correctness. If otherwise, serious consequence may follow.
Check the storage battery before starting the device to make sure the open-circuit voltage of
the battery meets the requirement.
• Record field measured data accurately;
• Make sure the positive and negative polarities are correct. Incorrect polarity may damage
the module seriously.
• Measure the resistance of cables (between the junction box and the PCS) by ohmmeter.
Accurately record all measured data.
7.2.4 Checking Grid Voltage
• Measure accurately the grid side 3-phase line voltage: L1-L2, L1-L3, and L2-L3. The
measured data should not exceed PCS AC side permissible value and the three-phase
voltages should be balance.
Adjust the transfer ratio of the transformer by qualified personnel if the grid
voltage deviation is serious.
User Manual 7 Commissioning
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