GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 57)

AKD-20 Low Voltage Switchgear
Chapter 8. Energizing the Switchgear
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8-1 Before Energizing
Before switchgear is energized, a thorough final check should be
made using the following checklist: Refer to section 6-5 for
additional information.
• Breakers and other operating mechanisms exercised
• Electrical insulation resistance tested phase-to- phase
and phase-to-ground
• Relays, meters and instruments properly connected
• Electrically operated breakers and operating mechanisms
exercised
• Ground fault protection system tested
• Adjustable trips properly set
• Field wiring secured and free of live bus
• Grounding connections made
• All debris, scrap wire, etc. removed
• All covers installed, doors closed and latched
8-2 Energizing Procedures
CAUTION: Energizing switchgear for the first time is
potentially dangerous. Therefore, qualified electrical
personnel should be present when the equipment is
energized. If problems caused by damage or poor installation
practices have not been detected in the checkout procedure
described previously, serious damage can result when power
is turned on.
ATTENTION: La mise sous tension pour la première fois d’un
dispositif de commutation est un acte potentiellement
dangereux. Il faut donc que du personnel qualifié en
électricité soit présent lorsque l’équipement est mis sous
tension. Si lors de la procédure de vérification décrite
précédemment des problèmes causés par des dommages ou
de mauvaises pratiques d’installation n’ont pas été détectés,
il peut en résulter des dommages sérieux lorsque le contact
est établi.
1. There should be no load on the switchgear when it is
energized.
2. Turn off all of the downstream loads, including those such
as motor control centers and other devices which are
remote from the switchgear.
3. The equipment should be energized in sequence by
starting at the source end of the system and working
toward the load end. In other words, energize the main
devices, then the feeder devices, and then the branch-
circuit devices.
4. Turn the devices on with a firm positive motion