ABB Fimer PVS980-58-1818kVA-I, Commissioning And Maintenance Manual

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18 Start-up and operation
Measure that the polarity of all DC inputs is correct separately. test each junction box separately, connect
and disconnect one by one. Pay attention to use a minimum of 1500 V tester during this procedure.
Check the DC input polarity
1. Make sure that all the combiner box breakers are open.
2. Verify, with the voltage detector that no voltage is present at the DC bus input terminal.
3. Close the breaker of the first combiner box. Verify that the polarity of the DC+ and DC- terminal is
correct with the voltage detector.
4. Check that the DC voltage b and - is in the correct voltage range of the inverter, also verify
that the voltage to ground of DC- and DC+ are the same value range (for 1500 V DC it should be
around 750 V DC). This check ensures that the impedance value to ground is similar for DC+ and DC-.
5. Disconnect the breaker of the combiner box.
6. Repeat the steps 3 to 5 for all the other combiner boxes separately.
Make sure that the open circuit DC voltage from the solar generator is in the correct range for the
inverter.
You can make an estimate of the expected DC voltage: Use the open circuit voltage of the solar modules
and the number of modules in a string.
Make sure that there is only one insulation monitoring for the inverter in the same galvanically connected
IT system. Each inverter has one insulation monitoring device.
In case of G417, refer to the
Firmware manual .
Verify the operation of the inverter first in the local control mode with the control panel (ACS-AP-I) or the
Drive composer PC tool. Then set the control program parameters.

Parameter settings before the first start
Make the parameter settings needed before the first start according to the firmware manual.
Refer to the start-up section of the
Firmware manual
.

First start (local control mode)
Disable the external communications, for example, for the data logger, plant controller or SCADA
system.
Release the fast power off switch.
Turn on the external or internal auxiliary voltages. If internal: Main supply needs to be on before you
switch on the auxiliaries.
In very humid or cold conditions, the thermostat and hygrostat in the control cabinet start the heaters and
prevent the startup of auxiliary power supplies until the control cabinet temperature increases to a
suitable level, and the humidity decreases to the set level. This can take up to one day. Keep the inverter
doors closed during this time. Heater operation is indicated by a blue LED outside the inverter.
Close the optional manual DC main switches. Make sure that the DC voltage of the solar generator
matches the value of the 208.01 DC Input Voltage parameter. If there is a mismatch of the voltages, do
not start the inverter. Contact your local FIMER representative.
Close the optional manual AC main switches or with optional AC breakers (+F296), set parameter
214.02 to “Close”.
Verify the AC voltage from parameters 190.06 to 190.08. If the AC voltage differs from the grid value, do
not start the inverter. Contact your local FIMER representative.
Check the DC input grounding impedance
1. Make sure that all the combiner box breakers are open.
2. Use the voltage detector to verify that no voltage is present at the DC bus input terminal.
3. Set grounding mode parameter 210.01 = OFF.
4. Close the breaker of the first combiner box. Read the insulation resistance value 210.29 (the
measurement time can be adjusted via parameter 210.31), this value should be at least some Mohms.
5. Close the next combiner box breaker and repeat the steps 3 and 4 for all the other combiner boxes.
6. Once all the PV strings are connected, set parameter 210.01 = AUTO. and check that value 210.14
grounding current is no higher than some hundreds mA.
7. Use the voltage detector to verify that the voltage between DC- and ground is zero. If not, the
grounding relay of the inverter has not yet grounded the system.
Make sure that the settings of the insulation monitoring device are suitable for the installation and obey
the local regulations. The trip limit is adjusted to 3 kohm at the factory.