SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Sunny Central; Checking the Settings of the Switching Units; Checking the Connectors; Connection and Measurement

Test point Tasks
High-current contact Check whether the high-current contacts established at the installation site are tightened to
the correct torque. If the torque is not correct, release and clean the high-current contact and
tighten with the required torque.
Terminal lugs Ensure that the terminal lugs are crimped edge to edge.
Cable support rails Ensure that the cables are adequately attached to the cable support rails.
6.3.3 Sunny Central
6.3.3.1 Checking the Settings of the Switching Units
Test Point Tasks
AC circuit breaker Ensure that the settings comply with the specifications in the schematic diagram.
GFDI
Hygrostat
6.3.3.2 Checking the Connectors
Test Point Tasks
Connectors on the CAN bus Ensure that all connectors are securely in place.
Connectors on the SC20cont
Connectors on the inverter bridge
Connectors on the communication unit
Connectors on the hub
Connectors on the router
6.4 Connection and Measurement
6.4.1 Sequence for Connection and Measurement
Procedure See
Use the tap changer on the MV transformer to adjust the voltage of the utility
grid.
Section6.4.2, page77
Switch on the transformer panel and the ring circuit of the medium-voltage
switchgear.
Section7.8, page102
Measure the voltages on the primary and secondary sides of the MV transformer
and record the values in the commissioning report.
Section6.4.3, page77
Ensure that the supply voltage is within the permissible voltage range of the in-
verter of −10% to +15%.
Section6.4.4, page77
Check the output voltage of the inverter. Section6.4.5, page77
Check the DC voltage. Section6.4.6, page78
6 Commissioning
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-1176