ABB ZS1 Instruction Manual page 5

Summary
1
1.1 General
The metal-clad, three-pole air-insulated panels
without disconnectors from type ZS1 for rated
voltage of 12 kV and 17.5 kV are factory-
assembled, type-tested indoor panels. They are
designed as withdrawable switchgear and fitted
with single busbar systems. The withdrawable
breaker parts are preferably fitted with vacuum
circuit-breaker
Details of the technical design and configuration of
the switchgear, such as technical data, detailed
equipment lists, comprehensive circuit docu-
mentation etc., can be found in the relevant order
documents.
1.2 Standards and specifications
ZS1 switchgear comply with the standards and
specifications for factory-assembled and type
tested high voltage switchgear in VDE 0670, and
the relevant IEC publications 60298 and 60694.
In addition, in accordance with IEC 60529, the
panels have degrees of protection
• IP 4X (up to IP 55 possible) for the enclosure
• IP 2X for the partitioning.
All other relevant VDE specifications, especially DIN
VDE 0101, VDE 0105 and DIN VDE 0141, the
corresponding IEC publications, the national or
local workplace safety regulations and the safety
regulations for production materials are to be
followed during erection and operation of this
equipment. In addition, the order-related data and
instructions from ABB are to be observed.
1,0
k
0,8
0,6
0,4
1000
6
2000 3000 4000
H
1.3 Operating conditions
1.3.1 Normal operating conditions
The switchgear are basically suitable for normal
operating conditions for indoor switchgear and
controlgear in accordance with VDE 0670, Part
1000 (IEC Publication 60694). The following limit
values, among others, apply:
• Ambient temperature:
– Maximum
– Maximum 24 h average
– Minimum (according to
"minus 5 indoor class"
• Humidity:
VDE 0670 Part 6 amends the contents of VDE
0670 Part 1000 with respect to humidity as
follows: With indoor installation, it is assumed
that the humidity within the enclosure can reach
high values, but without condensation normally
appearing on the installed equipment. Con-
densation can be prevented by appropriate
design of the station building or switchgear
room.
• Site altitude:
– The maximum site altitude is up to 1000 m
above sea level.
1.3.2 Special operating conditions
Special operating conditions must be agreed by
the manufacturer and operator according to VDE
0670 Teil 1000. The ZS1-switchgear provides
opportunities to comply, for example, with the
following special operating conditions
• Increased ambient:
Conductors and switching devices to be
designed for a higher rated current.
• Increased humidity:
Heaters to be installed in the panels.
• Sites altitudes above 1000 m:
Design panels for higher insulation level in
consideration of the altitude factor k according
to figure 1/1.
Figure 1/1: Curve for determination of the altitude factor k in
relation to the altitude H
(Sourcee: ABB switchgear manual,
9th Edition, 1992)
m 5000
+ 40 °C
+ 35 °C
– 5 °C
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