3kw Light Guide Column Section 3kw light guide column Guangdong ChongWei Technology Ltd. , https://www.chongweitech.com
++++General
VD4 medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 12~24kV and frequency 50/60Hz,widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment, especially, It is used for the occasion that needs infrequent operation at rated current or multi-breaking short circuit current, may be mounted in the indoor air insulating switchgear like type KYN28 or AMS, ABB type ZS1 series, etc. This circuit breaker is standards as GB1984-2003 AC high voltage circuit breaker,JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker,DL/T403 Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker for order as well as IEC60694.
This circuit breaker is made with mature APG technology. The application of VD4 terminal buffer guarantees the indoor terminal is ever more reliable in nay operation environment. VD4 can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries.
++++Service environment
a) Air temperature: Maximum temperature: +40ºC; Minimum temperature:-25ºC
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
++++ Main technical specifications
No
Item
Unit
Parameter
1
Rated voltage
kV
12/17.5
24
2
Rated frequency
Hz
50/60
3
Rated current
A
630, ...4000A
4
1min Power frequency withstand voltage
kV
48
65
5
Lightning impulse withstand voltage
kV
75/95
125/150
6
Rated short circuit breaking current (peak)
kA
50/63/80/100
7
Rated active load and close circuit breaking current
A
63
50
8
Rated short breaking current
kA
20, …40
9
Rated short circuit making current (peak)
kA
50/63/80/100
10
Rated cable(line) charging breaking current
A
50 and 10
11
Rated capacitor bank switching current
A
400
12
Rated withstand current (peak)
kA
50/63/80/100
13
Short time withstand current (4s)
kA
20, …40
14
Mechanism life
times
10000
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++++Advanced techniques and capabilitiesÂ
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The circuit-breaker VD4-12(24) is the newest equipment in the voltage class of 12kV up to 24kV manufactured by Zhejiang Farady Electric Co., Ltd. It is universal used in power distributing and transforming systems of power stations, power generators, and secondary substations of mines, industries and infrastructures.
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The circuit-breaker VD4-12(24) has complete type specifications:
the rated voltage is 12kV, the rated current is up to 4000A and the rated short circuit breaking current is up to 50kA.
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The circuit-breaker VD4-12(24) is equipped with modularized spring operating mechanism which has characteristic of more convenient maintenance, rapider replacing of parts and more reliable performance.
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The circuit-breaker VD4-12(24) adopts embedded poles that the vacuum interrupter with low resistance and the primary main electrical circuit are cast in insulating cylinders by epoxy resin.
This structure makes the breaker have more reliable insulation.
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The embedded poles of circuit-breaker VD4-12(24) have the technique of ventilation and convection. Besides, the vacuum interrupter is with low resistance. All of these reduce the power consumption and the temperature rising due to the longtime running of circuit-breaker.
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The circuit-breaker VD4-12(24) has perfect performance when it is breaking short-circuit current or being operated frequently.
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Beside that it also has the functions of automatic reclosing and reliable operating.
The driving mechanisms of circuit-breaker VD4-12(24) are designed by professionals in CooperNature and with characteristic of reliable closing performance, low impact force and longer lifetime. The mechanical lifetime can be up to 30000 cycles.
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All of the mechanism's surface of circuit-breaker VD4-12(24) is disposed with special process and lubricative technique. Not only the rust-resistance capability is improved but also the operating performance is ensured. The circuit-breaker is also applicable to humid and hot regions.
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The circuit-breaker VD4-12(24) has been through the whole type test in accordance with the standards of GB and IEC.
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++++Innovative product design
Damper with perfect performance
Thanks to the refined damper with perfect performance and
the new cam gear with curvilinear design, the contacts rebounding
value during the breaker opening is reduced more and the
breaker can be opened reliably. Besides, the bellows in vacuum
interrupter are avoided to be broken down due to contacts over
bounding and also the mechanical lifetime of operating mechanism
is ensured.
Special design of repair without many tools
During the design for VD4 circuit-breaker, the installation and
repair must be taken into account. So for the disassembly of
parts or accessories, users need no special tools and the repair
becomes more convenient. Besides, all of the secondary
controlling components are in front of the operating mechanism,
which also make maintenance and repair convenient.
Modularized operating mechanism
Modularized operating mechanism is another feature of VD4.
It can be divided into closing module, opening module, mainaxis
module and secondary wiring module, which make the
mechanism have characteristic of standard manufacture
method, short producing period, convenient maintenance and
rapid replacing. These modules are standard and applicable to
all VD4 so the costs of facilities management and maintenance
are reduced.
Self- lubricative bearing without oil
Self-lubricative bearing without oil used for VD4 circuit-breaker
is very applicable to over-load and low-speed conditions and
avoids the lost-lubricative phenomena due to oil-lubricative
bearing out of work for a long time. The free-maintenance can
be realized accordingly.
Conductors with silvered surface
All the conductors of VD4 circuit-breaker are disposed by silvered
process so that it do not only reduce the contacting resistance
but also improve the electricity-conducting capacity
of conductors. Thanks to the reduced resistance the heat from
circuit-breaker running can be decreased and the breaker's lifetime
is also lengthened.
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++++The breaking No. and breaking current of vacuum interrupter
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Model NO.: VB4
Poles Number: 3
Type: Circuit Breaker
Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
Certification: ISO9001-2000, CE, CCC, Type Test
Trademark: Farady
Transport Package: Wooden Case
Origin: P. R. China
HS Code: 85352100