Item: VD4/S

Indoor fixed type vacuum circuit breaker

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[fusion_tab title=”Application”]The  vacuum  circuit-breakers  of  type  VD4/S  are  intended  for  indoor  installation  in  air-insulated switchgear  systems.  They  have  a  switching  capacity  capable  of  handling  the  loads  occurring  at start-up and shutdown of equipment and plant units both in normal and in fault state.Vacuum  circuit-breakers  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.  T ype  VD4/S  vacuum  circuit-breakers  are  suitable  for autoreclosing, and have exceptionally high operating reliability and long life. The  vacuum  circuit-breakers  of  type  VD4/S,  designed  in  column  form,  can  be  supplied  both  as individualunits for switchgear T ype SM6, Uniswitch, HXGN, etc.
Standards and specifications
Switchgear manufacture
The  switchgear  complies  with  the  following  specifications  in  accordance  with  DIN,VDE  and  the relevant IEC publications:
• VDE0670, part1000 and IEC60694
• VDE0671, part100, and IEC62271-100.
• GB1984-2003
Installation  and  operation  The  relevant  specifications  are  to  be  taken  into  account  during installation and operation, particularly:
• DIN VDE0101, Power installations exceeding  AC1 kV
• VDE0105, Operationof electrical installations
• DIN VDE0141, Earthing systems for special power installations with rated voltages above1 kV
•  Accident  prevention  regulations  issued  by  the  appropriate  professional  bodies  or  comparable organizations.
Operating conditions
Normal  operating  conditions  Design  to  VDE  0670,  part  1000,  “Common  specifications  for high-voltage switchgear and controlgear standards“ and IECpublication60694, with the following limit values:
•  Ambient temperature:
–Maximum +40℃
–Maximum24 hour average +35℃
–Minimum (according to “minus5 indoor class”) –5℃
• Humidity:
–the average value of the relative humidity , measured over a periodof24 h, doesnot exceed95%
–the average value of the water vapour pressure, over a period of24 h, does not exceed2,2 kPa
–the average value of the relative humidity , over a period of one month, does not exceed90%
–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.
Specialoperating conditions:
Special operating conditions are to be agreed onby the manufacturer and user . The manufacturer must be consulted in advance about each specialoperating condition:
• Site altitude over1000 m:
–Allow for the reduction in the dielectric strengthof the air .
• Increased ambient temperature:
–Current carrying capacity is reduced.
–Provide additional ventilation for heatdissipation.
• Climate:
–A void 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 phenomena [/fusion_tab]
[fusion_tab title=”Specification”]

++++Technical data:

 No.

 Item

 Unit

 Parameters

 1

 Rated voltage

 kV

  12/17.5

  24

  2

 Rated frequency

 Hz

      50/60

  3

 Rated current

 A

 630/800/1250/1600

 4

 1min Power frequency withstand voltage

 kV

       38/42/45

 50

 5

 Lightning impulse withstand voltage

   kV

 75/95

125/150(*)

 6

  Rated short circuitbreaking current (peak)

 kA

 50/63/80

 7

 Rated shortbreaking current

  kA

     20/25/31.5

 8

 Rated short circuit making current (peak)

    kA

   50/63/80

 9

 Cable chargebreaking current in earthing fault

  A

 20

    20

 10

  Rated withstand current (peak)

  kA

   50/63/80

 11

 Short time withstand current (4s)

   kA

  20/25/31.5

 12

 Mechanism life

  times

     10000

 13

 Operation sequence

O-0.3-CO-180S-CO

 14

 Rateof riseof transient recovery voltage

   kV/uS

  0.34/0.42

  0.47

 15

Peak of transient recovery voltage

   kV

  20.6/30

  41

Guideline values for function times:

 No

 Item

    Unit

 Parameter

 1

 Closing time approx

   ms

   60ms

 2

 Opening time approx

   ms

  Less than45ms

  3

 Arcing time (at50Hz)

 ms

   Less than15ms

 4

     Breaking time

  ms

   Less than 60 ms

 Minimum command

 5

 T ime on closing

 ms

    20ms(¹)(120ms(²))

 35ms(¹)(70ms(²))

 6

  Time on opening

  ms

 20ms(¹)(80ms(²))

 20ms(¹)(50ms(²))

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[fusion_tab title=”F&Q”]

Q:How to guarantee my order and payment.
A:Ezitown has Alibaba trade Assurance,100% refundable if any quality or delivery problem.

Q:How to return the goods if meet any problem
A:we have DHL and Fedex account for return goods.buyer no need to pay any shipping cost for returning. Can contact our salesman to operate.

Q:Why Ezitown price is competitive, and quality seems rather good ?
A:because we have been manufacturing more than 20 years, we know what price and Quality buyer can sell well in market.the wholeseller have suitable profits

Q:Can we order many items and make combine shipment.
A:we can combine many items,and deliver by courier/sea/land/air etc. pack well.

Q:Can I order the cabinet/enclosure/box and the wiring material from you or other supplier,you make wiring and assembly for us ?
A:we have egineering, wiring and assembly team for low voltage/medium voltage/high voltage/DC control .can make drawing and diagram to confirmation and proceed the assembly.we have unite nation project in regular assembly.
Q:How can I make our own brand for my order
A:we supply OEM service if order quantity meet the OEM MOQ , contact to know the exactly quantity for your item

Q:What is the delivery if I make payment
A:Almost all items we keep in stock.and we have many order every day , We need 1-3 working days to packing and make delivery.OEM packing will be longer time.

Q:Can we visit your factory or office ?
A:we always welcome customer visit us, let me know the schedule, we will arrange.

[/fusion_tab] Indoor fixed type vacuum circuit breaker Indoor fixed type vacuum circuit breaker Indoor fixed type vacuum circuit breaker Indoor fixed type vacuum circuit breaker
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