6 GHA l Switchgear extension and replacement of a panel
1 Safety provisions
This Technical Manual is for information only and is exclusively intended for
specialist electricians who have proven experience in conjunction with
the GHA series (training certificate) ●
the applicable safety provisions ●
● Common regulations for high-voltage switchgear and control gear: IEC
62271-1
The locally applicable accident prevention, operating and work instructions ●
must be complied with.
Installation: IEC 61936-1 / HD 637 S1 ●
1
Operation of electrical equipment: EN 50110-1 ●
1
1
The national standards applicable in the country where the equipment is to be
installed must be complied with.
Before performing work on the panel, it is essential that you comply with
the following instructions:
Warning:
Before starting work on high-voltage components, de-energize the
system, verify it for zero voltage and earth the system in accordance
with the applicable safety rules pursuant to EN 50110-1.
Warning:
After removal of covers, operator safety in accordance with IEC
62271-200 may be restricted if the appropriate part of the switchgear
has not been isolated from the power supply.
For the work described in this manual, operator safety from internal
arcs in accordance with the IAC classification is not ensured. Thus,
in the case of manual switching operations, persons may only be
located directly in front of the panels.
Optimum operator safety is only ensured if the switchgear is com-
pletely disconnected from the power supply and earthed during
extension or replacement of panels. Thus, attempts should be made
to achieve this switch condition at all times.
Warning:
Before performing work in the drive area of the switchgear panels,
switch off the supply voltage and prevent it from being switched ON
again.
Warning:
There is a risk of injury when working on the drive mechanism. Be-
fore commencing work, release the energy-storing device by
the OFF-ON-OFF (Open/Close/Open) operating sequence on the –
circuit-breaker
closing the make-proof – busbar earthing switch.
Warning!
The top sides of the panels are not meant to be walked on. Persons
may fall through them, get injured or may damage the panel. When
work has to be performed on the panel top, temporarily position a
solid base plate to step on.
Applicable standards and
regulations:
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