ABB IS-limiter User Manual

5
1.1 General
ABB’s 36kV I
s
-limiter
TM
panel is a three-phase, metal
enclosed, air-insulated switchgear and all units are factory-
assembled, type tested and suitable for indoor applications
up to 36 kV. The panels are fitted with I
s
-limiter
TM
switch
inserts as fixed installation along with CTs & Busbars.
This Manual does not contain any instruction relevant to
customer specific documents. Details of the technical
design and equipment of individual switchgear, such as
technical data, detailed component lists for the individual
panels, detailed wiring diagrams etc. can be found in the
relevant order documents.
1.2 Standards and
specifications
The I
s
-limiter
TM
switchgear complies with standard and
specifications prescribed on IEC publications 62271-200 and
62271-1 for factory-assembled, metal enclosed, and type
tested high voltage switchgears.
Additionally, the switchgear offers IP4X degrees of
protection for the enclosure as prescribed by the IEC
publication 60529.
All other corresponding IEC publications, national and local
safety at work regulations and safety regulations for
production materials must be followed during erection and
operation of these systems. The order related details
provided by ABB are also to be taken into account.
1.3 Operating conditions
1.3.1 Normal operating conditions
The switchgear installations are fundamentally designed
for the normal operating conditions for indoor switchgear
and switchboards in accordance with IEC Publication
IEC62271-200. The following limit values, among others,
apply:
Ambient temperature:
• Maximum:+ 40°C
• Maximum: 24-hour average+ 35°C
• Minimum: (according to "minus 5 indoor" class) - 5°C
With indoor installation, it is assumed that the humidity
within the enclosure can reach high values, but that there is
normally no condensation on the equipment installed.
Condensation can be prevented by appropriate design of
the station building or switch room.
The maximum altitude at which the unit may be installed is
1000 m above sea level.
1.3.2 Special operating conditions
The manufacturer must be consulted in advance for special
operating condition.
For example:
• At site altitudes over 1000 m, the insulation level must
allow for the reduction in the dielectric strength of
the air
• Any increased ambient temperatures must be taken into
account in the design of the busbars or their current
carrying capacity will be limited
Notes on special climatic operating conditions:
When operating switchgear in climates with high humidity
and/or major rapid temperature fluctuations, there is a risk
of dew deposits, which has to remain an exceptional
condition for indoor switchgear under normal operating
conditions. Preventive measures (e.g. suitable ventilation
and proper air conditioning of the building or housing,
use of dehumidifying equipment, etc.) must be taken into
consideration in consultation with ABB to avoid this
condensation phenomenon and any resulting corrosion or
other adverse effects.
—
1. Summary

ABB IS-limiter Specifications

General

Brand	ABB
Model	IS-limiter
Category	Industrial Equipment
Language	English