Checking The High-Current Contacts Made At The Factory; Checking The Settings Of The Switching Units; Checking The Connectors; Connection And Measurement - SMA SUNNY CENTRAL 500CP XT User Manual

4 Commissioning
Test point
High-current contact
Terminal lugs
Cable support rails
4.3.4

Checking the High-Current Contacts Made at the Factory

High-current contacts made at the factory
High-current contacts made at the factory are marked off. Providing that the marking is not damaged and runs
across the bolted connection as shown in the figure, this means that the torque complies with the specifications.
Procedure:
• Check whether the high-current contacts made at the factory are correctly marked off.
If a high-current contact is not correctly marked off, release the high-current contact, tighten with the required
torque and mark off again.
4.3.5

Checking the Settings of the Switching Units

Test Point
AC circuit breaker
GFDI
Hygrostat
4.3.6

Checking the Connectors

Test Point
Connectors on the CAN bus
Connectors on the SC20cont
Connectors on the inverter bridge
Connectors on the communication unit
Connectors on the hub
Connectors on the router
4.4

Connection and Measurement

4.4.1

Sequence for Connection and Measurement

1. Use the tap changer on the MV transformer to adjust the voltage of the utility grid (see documentation of the MV
transformer).
2. Switch the transformer field and the ring circuit of the medium-voltage switchgear on (see documentation of the
medium-voltage switchgear).
3. Measure the voltages on the primary and secondary sides of the MV transformer and record the values in the
commissioning report.
4. Ensure that the supply voltage is within the permissible voltage range of the inverter of −10% to +15%.
30 SCCPXT-E7-BA-en-58
Tasks
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.
Ensure that the terminal lugs are crimped edge to edge.
Ensure that the cables are adequately attached to the cable support rails.
Tasks
Ensure that the settings comply with the specifications in the schematic diagram.
Tasks
Ensure that all connectors are securely in place.
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