INSTALLATION - COMMISSIONING
52
9.
Press and release the ‘
Enter
’ button to accept the setting.
10.
Press and release the ‘
ESC
’ button once to return to the menu displaying ‘VStart1 VStart2’.
11.
Press and release the down ‘
↓
’ button. The arrow on the screen will move from ‘VStart1’ to ‘VStart2’.
12.
Press and release the ‘
Enter
’ button to select ‘VStart2’. ‘Set VStart2’ and the current start voltage setting
for the string connected to IN2 will be displayed on the screen.
13.
Press and release the up ‘
↑
’ or down ‘
↓
’ buttons to change the voltage to the desired setting.
a. If the string connected to IN2 has 5 modules, set the voltage to 140 V.
b. If the string connected to IN2 has 6 modules, set the voltage to 170 V.
c. If the string connected to IN2 has 7 or more modules, set the voltage to 200 V.
14.
Press and release the ‘
Enter
’ button to accept the setting.
15.
Press and release the ‘
ESC
’ button until you exit ‘Settings’ mode.
VERIFICATION OF SYSTEM OPERATION
This step is performed to verify the PV system is operating correctly.
1.
Ensure all DC Isolators are in the ON position (Rooftop and Inverter DC Isolators).
2.
Ensure the AC Isolator is in the ON position.
3.
Ensure the PV system is operating under irradiance conditions greater than 500 W/m
2
.
4.
After waiting for the inverter to connect to the grid, record the ‘Input Voltage’ for each string which will be
alternately displayed on the inverter LCD screen. Check this ‘Input Voltage’ is within ±5% of the value for
the number of modules in each string, according to the following table:
Indicative String V
mp
@ NOCT
Number of modules in string
4
5
6
7
8
9
10
11
12
13
14
HSL60P6-PB-1-250 modules
110
138
166
193
221
248
276
304
331
359
386
REC255PE modules
114
143
171
200
228
257
285
314
342
371
399
* Values measured at normal operating cell temperature (NOCT) defined as: irradiance of 800 W/m
2
,
Spectrum AM 1.5, wind speed 1 m/s and ambient temperature 20ºC. Variations from NOCT values will affect
actual V
mp
and should be allowed for.
EARTH FAULT PROTECTION TEST
This step is performed to verify that the earth fault protection system and earth fault alarm is operating
correctly.
1. Set the PV system in normal operation mode.
2. Using a variable resistor load, simulate a high impedance earth fault on one of the unearthed
conductors of the PV array cable.
3. Decrease the resistance gradually until the earth fault protection device detects the fault. Record the
earth fault current level or resistance, or both, that triggers the earth fault protection device.
4. The measured values should comply with the requirements of IEC 62109 for earth fault detection.
5. Check that the earth fault alarm operation complies with AS/NZS 5033 earth fault alarm
requirements
a. If applicable, an email should be received by the PV system owner and/or installer and/or
dealer.
b. If applicable, an audio and/or visual alarm should operate
c. Inverter display should indicate the presence of an earth fault
6. Repeat steps (1) to (5) for both the positive and negative conductors with unearthed PV arrays
7. Repeat steps (1) to (6) for each PV array connected to the inverter.
