Connecting central grid and system protection
Central grid and system protection with circuit breaker
1 | Inverter PIKO CI |
2 | Connection |
3 | Grid and system protection Switch closed: Feed-in Switch open: Feed-in prevented |
4 | Activate grid and system protection via KOSTAL PIKO CI app. |
Central grid and system protection is required in some countries. This monitors the voltage and frequency in the grid and in the event of a fault, shuts down the photovoltaic systems by means of a circuit breaker.
If your energy supplier requires central grid and system protection for your system, install an external monitoring device, which switches off the inverter via a normally open or normally closed contact. An additional circuit breaker is not necessary because of the internal switches in the inverter.
- De-energise the mains cable.
DANGER
Risk of death due to electrical shock and discharge!
De-energise all devices and secure them against being switched on again.
- Mount the monitoring device in the control cabinet or power distributor.
- Correctly route the communication cable from the inverter to the control cabinet and connect following wiring diagram provided by manufacturer.
INFO
Requirements of communication cable:
- Wire cross-section from 0.34 to 1.5 mm² (rigid) or 0.34 to 1.0 mm² (flexible)
- Length max. 30
- Length of stripped insulation approx. 5 mm
- Pass the communication cable through the cover for the COM2 connection panel. Seal connection with sealing ring and union nut.
- Connect the communication cable to the plug connector for the communication interface. Please note the pin assignment.
Torque: 0.2 Nm. - Connect plug connector on inverter to communication interface in COM2 connection panel.
1
COM2 connection panel
2
Communication interface
3
Plug connector
- After commissioning, the function must be activated in each inverter via the KOSTAL PIKO CI app.
This can be activated under Settings > Basic settings > External shutdown > ON.
- Inverter set up for grid and system protection function.