Eaton Power Xpert Solar 1500 User Manua page 13

De-Energizing the Inverter
The Power Xpert Solar 1500/1670 kW Inverter is designed to
be connected to photovoltaic DC energy and export AC
energy. It stores a significant amount of capacitance
electrical energy.
The Inverter Must Be Considered Energized
Whenever:
The medium voltage transformer is energized from the
●
utility.
The inverter's main output circuit breaker CB1 is closed.
●
The inverter's control-power circuit breaker CB2 is closed.
●
Any of the PV System's external (to the inverter)
●
disconnects are closed.
Closed (ON) means the switching-device contact(s)' are
engaged and able to transfer energy: Voltage or Current.
AC and DC Disconnecting Means:
The inverter does not provide a means to isolate utility
●
voltage on the transformer-side of circuit breaker CB1, CB2
or CB4, which are located inside the inverter AC cabinet
(section) outer door panel.
The AC bus will be energized whenever the MV
●
transformer is energized.
The inverter does not provide a means to isolate
●
input-circuits from the PV system's side of disconnects
DS1, DS2, and DS3, nor the inverter's pre-charge fuses
located inside the doors of the inverter DC cabinet
(section).
The DC Cabinet Section will be energized whenever
●
external PV-disconnects are closed (electrically
connected to the inverter)
Power Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.com
Definitions, Safety, and Limitations
De-Energizing the Inverter Procedure
1. Turn the ON/OFF function on the HMI (LCD) to the OFF
position.
2. The inverter will de-energize when the ON/OFF function
on the HMI is turned OFF and CB1, CB2, CB4, DS1,
DS2, DS3, and pre-charge fuses are verified to be in their
respective opened (disconnected) state.
Pressing the emergency stop switch (E-stop) will
●
shut-off the inverter, forcing open CB1, DS1, DS2, and
DS3, but not the pre-charge fuses, CB2 or CB4.
3. The medium voltage transformer, unless de-energized
from the utility (or through optional switches and
breakers on the medium voltage side) will remain
energized, including the low voltage side connected to
the inverter output phases.
All PV systems vary, therefore it is the responsibility of
●
the site operator/owner to ensure de-energizing
procedures of the transformer are defined and followed.
4. Wait at least 5 minutes to allow the stored capacitive
energy to dissipate before opening the inverter cabinet
doors and access panels.
Using the appropriate PPE, verify all capacitive voltage
●
has discharged before servicing the inverter or removing
any protective guards to access fuses, terminals, and
inverter components.
Beware of any additional non-inverter components,
●
circuits, devices, and sources of stored or connected
electrical energy that may have been added to the
inverter or the photovoltaic-site, beyond the scope of
this manual.
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