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SYSTEM COMMISSIONING
Inverter / Dump load
Perform a visual inspection of the inside of the inverter; look for any damage that
might have occurred in shipping. Double check all inverter and grid connections
are tight and in good repair.
Open the dump load and locate the two copper bus bars. Take an OHM reading
between the two buss bars and ensure that you have 10 OHMS.
Press in the emergency stop button on the inverter.
Bring on grid power to the inverter via the grid side breaker. At this time the
dump load fans should start, but the inverter display should remain dark. Check
that the incoming grid voltage to the inverter is correct.
Pull out the emergency stop and observe that the display comes on. At this time
the inverter has started its initialization process. The process takes a total of five
minutes prior to connecting to the grid for power transfer.
Toward the end of the five minute countdown the inverter should make a high
pitched hum. While reaching the end of the countdown a loud "bang" should be
heard, this is the contactor closing.
NOTE: These tests are all performed while the turbine is in a phase to phase
shorted.
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REV 0.1
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