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8.2.4.1 PRELIMINARY CHECKS
Weather conditions:
It is of paramount importance to evaluate the weather conditions in the risk assessment prior any intervention on the equipment. This
procedure can be applied only in case of dry environment. Don’t proceed in case of rain (even light) or high humidity.
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:
- Perform a general integrity check of the instrument; examine the test terminals, its integrity and make sure they are properly fixed; make sure the
batteries level is enough high (don’t use the instrument in case the message “LOW BATTERY” is present) or replace them.
- Perform test of the instrument using an energized AC socket and a DC voltage source (example: battery in the service car) with known
voltage level; in case the instrument is provided with a self-test feature, follow the instructions provided in the instrument manual to carry
out the self-test.
• Check the voltage tester is working correctly:
• Check the DC current probe is properly working, make sure to perform the “ZERO-OFFSET” procedure and to select suitable DC
measurement range.
8.2.4.2 PPE
WARNING –
B
All the following activities (till the completion of the procedure) must be performed wearing the PPE.
Wear the appropriate PPE for carrying out the operations (overall resistant to electric arc, dielectric helmet with visor, insulating gloves).
8.2.4.3 Check the absence of dangerous voltages on inverter enclosure respect ground
Check the absence of dangerous voltage on the inverter chassis. The measurement point are between inverter chassis not-painted part
(both power module
(01)
and wiring box
(02)
- samples point circled in red) and the Protective earth point (ext.)
(10)
outside the inverter.
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