[Isolation Device]
The inverter is not provided with isolation device.
However, as a complete assembly or system, the unit requires that the customer
shall supply external fuses and isolation device. This is not only good practice based
on safety consideration, but is a mandatory requirement as a license condition of an
approved equipment. A manual A.C. switch disconnector and D.C. switch
disconnector must be provided located in an accessible position.
Please check the unit nameplate and run ample capacity. A suitably rated Isolating
Switch (this is also an option that could be selected) should be fitted immediately
adjacent to each unit and installed both for AC output and DC input.
All incoming phase lines and neutral conductors and PV generator cables are to be
suitably fused at the Sub-Board to protect the installed wiring and the unit.
During installation, care should be taken to ensure that:
–An appropriate approved disconnect device shall be provided as part of PV system;
installation which shall disconnect simultaneously all live conductors of mains
supply.
–An appropriate approved disconnect device shall be provided as part of the device;
installation which shall disconnect simultaneously all PV input conductors of PV
generator.
– The disconnect devices are positioned in close proximity to the equipment and is
easily accessible to the operator.
– It is clearly marked as a disconnect device for the solar inverter unit.
Therefore, install separately a hand operated input disconnecting device (means)
between the PV generator and inverter, between MAINS and inverter. The
disconnecting devices must be of a type that can be locked to the open position
during installation and maintenance work, and constructed to disconnect all live
conductors of its power supply circuit.
Place a warning sign “do not turn on – maintenance in progress” on the external
disconnecting switch when it is shut down, and make sure that on/off remote
controls are inhibited.
Dual supply labeling should be provided at the service termination, meter position
and all points of isolation to indicate the presence of onsite generation and
indicating the position of the main A.C. switch disconnector.
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