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    barry@rockwill.cn

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    +86-577-27869969

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    Wengyang Industrial Zone,Wenzhou City, Zhejiang Province,China.

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Indoor Fixed Type Vacuum Circuit Breaker

Model
Nature of the Manufacturer
Other
Product Category
Switchgear Components
Place of Origin
City, Province
Overview
The VD4/S indoor fixed type vacuum circuit-breakers are intended for indoor installation in air-insulated switchgear systems.
Product Details

General:
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. Type 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 individual units for 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 above1kV
•  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 IEC-60694, 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 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 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 on by 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 strength of 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

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
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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