General Warnings And Precautions; Putting Into Service; Preparatory Work; Start-Up - ABB SafeRing Product Manual

14.2 GENERAL WARNINGS AND PRECAUTIONS

DANGER
Do not walk on the top of switchgear units!
DANGER
Switchgear operations must be carried out with the
doors closed.
WARNING
Operations and any type of work must be carried
out by trained and specialized personnel who are
familiar with SafeRing/SafePlus and follow all the
safety regulations in accordance with the IEC Stan-
dards and other regulations in force, as well as any
local work regulations and instructions.
NOTE
The tools required for installation and maintenance
of the switchgear are specified in the tool list in
chapter 20.6.

14.3 PUTTING INTO SERVICE

14.3.1 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 obser-
ving the relative position indicators.
− Check the mechanical and electrical interlocks for effective-
ness, without using force.
− Check the SF6 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 switch-disconnectors, circuit-breakers or
fuse-switches 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 switch-
gear 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.
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