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4. Panel design and equipment
4.1 Switchgear construction features
UniGear 500R is a medium voltage switchgear for
indoor applications with metal enclosure. Each cubicle
is divided into the following segregated compartments
(Figure 23)(Figure
24):
A: Low voltage compartment
B: Busbar compartment
C: Circuit-breaker and cable compartment
D: Gas duct channel
According to IEC 62271-200 Standard, the switchgear
is classified LSC2-PM.
In IEC version, the switchgear is provided with a
pressure
relief
duct,
switchgear (see par. 4.3.4.). The cubicles are all
factory-wired. Installation only requires external power
and auxiliary connections and the wiring between the
various sections.
The switchgear features a single busbar system and
one circuit-breaker compartment per cubicle. Each
circuit-breaker
compartment
removable circuit-breaker.
W ARNING
Before
performing
replacement
of
spare
deenergise the sw itchgear.
4.2 Internal arc clasification
UniGear 500R switchgear is guaranteed to withstand
an internal arc according to IEC 62271 -200 Standard
(criteria 1 to 5) and ENA 41-36 (for ENA version only).
Accessibility to the switch gear varies according to the
type of intervention and the version.
I n tern al arc cl assi fi cati o n
IEC v ersion
ENA v ersion
IEC version (I AC AFLR)
All
the
operations
maintenance, replacement of spare parts) can be
performed either from the switchgear front or rear
(unless the switchgear is not installed against the
wall).
fitted
on
the
roof
is
equipped
any
maintenance
parts,
take
care
IAC AF LR
IAC AF
(normal
service
operations,
of
the
with
a
F i g u re 23: Examp l e o f I EC versi o n p an el .
ENA version (I AC AF)
Normal operations are performed from the switchgear
and
front only. Maintenance and replacement of spare
to
parts can be performed either from the switchgear
front or rear (only when switchgear is deenergised).
Note:
To enable effectiv e relief of internal arc gasses, the
switchgear must be mounted at a minimum distance of
600 mm from the rear wall.
F i g u re 24: Examp l e o f ENA v ersi o n p an el .
13
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