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2. Summary
2.1 Introduction
The instructions in this publication refer to
UniGear ZS1 medium voltage switchgear with
either withdrawable apparatus or switch-
disconnector. For correct use of the apparatus,
please read the manual carefully.
Thanks to the advanced design of ABB
switchgear, UniGear ZS1 is suitable not only for
many different applications, but also allows for
further technical and construction modifications
to suit any installation requirements.
Consequently, this manual may not include some
specific instructions concerning special
apparatus configurations. In these cases, it is
therefore strongly recommended to consult both
this manual and the latest technical
documentation (circuit and wiring diagrams,
foundation plans and any protection selectivity
studies).
2.2 General
UniGear ZS1 is three-phase, metal-enclosed, air-
insulated, LSC2B, PM * switchgear and all the
panels are factory-assembled, type-tested and
suitable for indoor applications up to 24 kV. The
panels are designed as withdrawable modules
and are fitted with a single busbar system. The
withdrawable parts are equipped with circuit-
breakers or contactors.
Details of the technical design and configuration
of individual switchgear, such as the technical
data, detailed equipment lists for the individual
panels and comprehensive circuit documentation
etc., can be found in the relevant order
documents.
* UniGear ZS1 panel variants have the most common
classification LSC2B, PM. Check other panel variants and
their LSC classification in catalogue 1VCP000138.
2.3 Standards and
specifications
UniGear switchgear panels comply with the
standards and specifications for factory-
assembled, metal-enclosed and type tested high
voltage switchgear to IEC publications 62271-200
and 62271-1. In addition, in accordance with IEC
60529, the switchgear panels have the following
degrees of protection:
IP 4X for the enclosure and IP 2X for the
partitions. All other corresponding IEC
publications, national or local safety at work
regulations and safety regulations for production
materials must be followed during erection and
operation of these systems. Above and beyond
this, the order-related data from ABB must be
taken into account.
2.4 Operating conditions
Normal operating conditions
The switchgear is basically suitable for normal
operating conditions for indoor switchgear in
accordance with IEC 62271-200. Among other
considerations, the following limiting values
apply:
The normal operational altitude is up to 1 000 m
above sea level. The indoor ambient conditions
are free of significant pollution, such as dust,
smoke, corrosive and/or flammable gases, vapors
or salt, etc.
Ambient temperature
Maximum
[°C]
40
Maximum 24 h average
[°C]
35
Minimum (according to "minus 5 door
class")
[°C]
-5
Ambient humidity
Maximum 24 h average of relative humidity
[%]
95
Maximum 24 h average of water vapour
pressure
[kPa]
2.2
Maximum monthly average of relative
humidity
[%]
90
Maximum monthly average of water
vapour pressure
[kPa]
1.8
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