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000878BG
7 - Operation
Switch-off procedure
1. Preliminary checks
• PPE Check: Verify the integrity of the PPE that is going to be used
to perform the operations.
• Equipment check: Check the voltage tester is working correctly.
2. Wear the appropriate PPE for carrying out the operations (overall
resistant to electric arc, dielectric helmet with visor, insulating
gloves). All the following activities (till the completion of the
procedure) must be performed wearing the PPE.
3. Check the absence of dangerous voltages on inverter chassis
respect ground:
• Check the absence of dangerous voltage on the inverter chassis.
The measurement point are between inverter chassis and a ground
point outside the inverter.
4. Operations on External AC source
• Disconnect any AC external sources.
• Afx designated lock preventing operation onto any external AC
disconnect device, afxing designated tags.
• Check on the status LEDs
05
the shutdown command has been
carried out: Missing Grid: Power LED (Green) Flashing – Alarm
LED (Yellow) on (solid).
5. Operations on External DC source
Note: In case of absence of External DC disconnect device go on the
section (Operations on internal DC Switch)
• Disconnect any DC external sources
• Afx designated lock preventing operation onto any external DC
disconnect device, afxing designated tags.
• Check on the status LEDs
05
the shutdown command has been
carried out: Missing DC voltage: All LEDs OFF.
6. Operations on Internal DC disconnect switches
15
• Open DC switches
15
.
• Afx padlocks and tags to inhibit the re-closing operation.
• Check on the status LEDs
05
the shutdown command has been
carried out: Missing DC voltage: All LEDs OFF.
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