Sunways PT 30k, User Manual, Page: 17 / 88

Safety precautions
PT 30k to PT 33k 15
WARNING
High leakage currents. Be sure to make an earthing connection before connec-
ting the power supply circuit (AC system).
2.3 Basic safety measures
All electrical work on the Solar Inverter must be carried out by a qualified elec-
trician while observing the VDE regulations, national and other regulations.
The protective screen and rear wall may only be removed and maintenance may
only be carried out by persons who are authorised by Sunways.
When circuit breakers are tripped, the cause of the fault must be determined
and eliminated before recommissioning the unit.
Check electrical equipment regularly.
Retighten any loose connections.
Replace damaged lines/cables immediately.
2.4 Safety concept
The following parameters are monitored and displayed continuously and simul-
taneously by the inverter controller:

DC overvoltage

Overvoltage L1, L2, L3

Undervoltage L1, L2, L3

Stand-alone operation

Overfrequency L1, L2, L3

Underfrequency L1, L2, L3

Surge error (brief overvoltage L1, L2, L3)

DC share in AC current L1, L2, L3

AFI residual current increase > 30 mA

AFI residual current > 300 mA

Overtemperature of heat sink, interior, chokes
When a malfunction occurs, feeding is immediately interrupted and the Solar
Inverter disconnects from the grid by triggering the mains contactor.
The potential-free alarm relay switches (except for grid undervoltage L1).
The following protective equipment is also provided:
Warning! High leakage current,
earth connection essential before
connecting supply.
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