SMA SUNNY ISLAND 8.0H - Testing Load Shedding

7 Commissioning SMA Solar Technology AG
118 SI80H-60H-OffGrid-IA-en-11 Installation Manual
7.24.5 Testing Load Shedding
If load shedding is present, you must carry out the following steps:
Requirements:
☐ All miniature circuit-breakers in all sub-distributions must be switched off.
☐ All loads must be switched off.
☐ The off-grid inverter must be in operation (see Section 7.24.2"Starting the Off-Grid
System",page116).
1. Switch to installer mode (see Section 7.5).
2. Note the set limiting values for load shedding:
• Select the 242.01 Lod1SocTm1Str parameter and note its value.
• Select the 242.03 Lod1SocTm2Str parameter and note its value.
• Select the 242.07 Lod2SocTm1Str parameter and note its value.
• Select the 242.09 Lod2SocTm2Str parameter and note its value.
3. Connect the miniature circuit-breakers of the AC loads in the sub-distribution. This discharges the
battery. The battery cannot be recharged because all sources are switched off.
4. Connect the loads and wait until the load-shedding contactor discards the loads.
Tip: Select the 120.01 BatSoc parameter and compare the state of charge with the configured
limit for load shedding. You can then check when the load-shedding contactor should discard
the loads.
☑ The load-shedding contactor discards the loads.
✖ Does the load-shedding contactor not discard the loads?
The multi-function relay for activating the load-shedding contactor is incorrectly configured.
• Check the configuration and rectify the fault.
There is a fault in the wiring of the load-shedding contactor.
• Select the parameter of the multi-function relay for the load-shedding contactor,
e.g. 241.02 Rly2Op for the Relay 2 multi-function relay of the master.
• Note the setting.
• Alternately set the parameter to On or Off. In this way, you can isolate the fault.
•Rectify the fault.
• Set the parameter to the setting that has been noted.
5. Switch off the loads and the miniature circuit-breakers of the AC loads in the sub-distribution.