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I N S TA L L AT I O N A N D O P ER AT I N G I N S T R U C T I O N S
14.3 Putting into service
Preparatory work
Before connection to the medium voltage network the
following work must be carried out in preparation for putting
into service:
• Check the general condition of the switchgear for any
damage or defects.
• Visually inspect the switching devices, cable bushings,
insulating parts, etc.
• Check the paintwork for any damage and, where neces-
sary paint over scratches to avoid corrosion
• Remove all residues of materials, foreign objects and
tools from the switchgear.
• If necessary, clean the switchgear and remove any traces
of greasy or sticky dirt.
• Correctly remount all covers etc. removed during
assembly and testing procedures.
• Switch the auxiliary and control voltage on.
• Carry out testing operations on switching devices either
manually or using electrical control, simultaneously
observing the relative position indicators.
• Check the mechanical and electrical interlocks for
effectiveness, without using force.
• Check the SF
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gas pressure of the tank. It needs to be at
green level before operating the switchgear.
• Instruct local operators regarding the basic features for
correct use of the switchgear.
Other checkpoints
• Depending on the allocation of responsibilities, it may
also be necessary to check the following equipment in the
vicinity of the switchgear:
• Power cables
• Auxiliary cables
• Auxiliary power source
• Remote control system
• Complete earthing system
• Switchgear installation room equipment
• Switchgear installation room characteristics:
- Pressure resistance in the case of an arc fault
- Ventilation
- Temperature
- Humidity
14.4 Start-up
Instructions
Comply with all relevant safety regulations.
Ensure that the Load break switches, switch-disconnectors,
circuit-breakers in the configuration are in the OPEN position.
Energize the power supply feeders. Connect the switchgear
step by step, observing the signals and indicators.
Where necessary, check that the conductors are in phase
when there are several incoming feeder cables and
switchgear sections. Carry out all measurements and check
that all functions that depend on the medium voltage power
supply are connected. Check there are no irregularities of
any kind.
