ABB VD4 Series, Instruction Manual

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Summary
1.1 General
The vacuum circuit-breaker of type VD4 on with-
drawable part are intended for indoor installation
in air-insulated switchgear of withdrawable design.
Their switching capacity is sufficient to handle any
conditions arising from switching of equipment
and systems components under normal operating
conditions, particulary short-circuits, within the
parameters of their technical data.
Vacuum circuit-breaker have particular advantages
for use in networks where there is a high switching
frequency in the working current range and/or where
a certain number of short-circuit breaking operations
are expected. The vacuum circuit-breakers of the
type VD4, designed in column form, are suitable for
autoreclosing, and have exceptionally high operating
reliability and long life.
Together with this instruction manual, it is essential
to consult manual BA 359, Vacuum circuit-breaker
type VD4, high current.
1.2 Standards and specifications
1.2.1 Switchgear manufacture
The switchgear complies with the following speci-
fications in accordance with DIN VDE/the relevant
IEC publications:
• VDE 0670, part 1000/IEC 60694.
• DIN VDE 0670, part 104, and IEC 62271-100
• DIN VDE 0847, part 4, and IEC 61000-4.
1.2.2 Installation and operation
The relevant specifications are to be taken into ac-
count during installation and operation, particu larly:
• DIN VDE 0101, Power installations exceeding
AC 1 kV
• VDE 0105, Operation of electrical installations
• DIN VDE 0141, Earthing systems for special po
-
wer installations with rated voltages above 1 kV
• Accident prevention regulations issued by the
appropriate professional bodies or comparable
organisations.
In Germany, these comprise the following safety
regulations:
– Health and Safety at Work Standards BGV A1
and BGV A2
• Safety guidelines for auxiliary and operating ma -
terials
• Order related details provided by
ABB Calor Emag.
1.3 Operating conditions
1.3.1 Normal operating conditions
Design to VDE 0670, part 1000, “Common specifi-
ca tions for high-voltage switchgear and control-
gear standards” and IEC publi cation 60694, with
the following limit values:
• Ambient temperature:
– Maximum +40°C
– Maximum 24 hour average +35°C
– Minimum (according to
“minus 5 indoor class”)
-5°C
• Humidity:
– the average value of the relative
humidity, measured over a period
of 24 h, does not exceed
95%
– the average value of the water
vapour pressure, over a period
of 24 h, does not exceed
2.2 kPa
– the average value of the relative
humidity, over a period of one
month, does not exceed
90%
– the average value of the water
vapour pressure, over a period
of one month, does not exceed
1.8 kPa
• Maximum site altitude:
≤ 1000 m above sea level.
1.3.2 Special operating conditions
Special operating conditions are to be agreed on
by the manufacturer and user. The manufacturer
must be consulted in advance about each special
operating condition:
• Site altitude over 1000 m:
– Allow for the reduction in the dielectric strength
of the air.
• Increased ambient temperature:
– Current carrying capacity is reduced.
– Provide additional ventilation for heat dissipa-
tion.
• Climate:
– Avoid the risk of corrosion or other damage in
areas:
• with high humidity and/or
• with major rapid temperature fluctuations.
– Implement preventive measures (e.g. electric
heaters) to preclude condensation phe no mena.
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