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Rated Short Circuit Breaking Current 20, 25, 31.5, 40 Vmd1 12kv Vacuum Circuit Breaker
Product description
Rated Short Circuit Breaking Current 20, 25, 31.5, 40 VMD1 12kV Vacuum Circuit Breaker
Technical Parameters
|
NO |
Item |
Unit |
Technical Date |
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|
1 |
Rated voltage |
kV |
12 |
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|
2 |
Rated insulating level |
Rated short time power frequency withstand voltage(1min) |
42 |
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|
Raed lighting inpulse withstand voltage (peak value) |
75 |
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|
3 |
Rated Frequency |
Hz |
50 |
|||||
|
4 |
Rated current |
A |
630 |
630 |
1250 |
1250 |
||
|
1250 |
1250 |
1600 |
1600 |
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|
|
|
2000 |
2000 |
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|
2500 |
2500 |
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|
3150 |
3150 |
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|
4000 |
4000 |
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|
5 |
Rated short circuit breaking current |
kA |
20 |
25 |
31.5 |
40 |
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|
6 |
Rated short time withstand current |
20 |
25 |
31.5 |
40 |
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|
7 |
Rated peak withstand current |
50 |
63 |
80 |
100 |
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|
8 |
Rated short-circuit closing current (peak value) |
50 |
63 |
80 |
100 |
|||
|
9 |
4S rated short-time withstand current 4s |
20 |
25 |
31.5 |
40 |
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|
10 |
Rated shock steady current |
50 |
63 |
80 |
100 |
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|
11 |
Rated making surge current of capacitor bank |
12.5(The frequency is less than 1000Hz) |
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|
12 |
Rated breaking current of single/symmetrical capacitor bank |
A |
630/400 (The value shoule be 800/400 while the current is 40kA) |
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|
13 |
Duration of rated short-circuit current |
S |
4 |
|||||
|
14 |
Power frequency withstand voltage of secondary circuit |
V |
2000 |
|||||
|
15 |
Rated operationl voltage |
Making coil |
AC110/220 DC110/220 |
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|
Breaking coil |
AC110/220 DC110/220 |
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|
Energy-storage motor |
AC110/220 DC110/220 |
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|
16 |
Making time (under Rated voltage) |
ms |
35-70 |
|||||
|
17 |
Brealing time(under Rated voltage) |
20-45 |
||||||
|
18 |
Permitted abrasion thickness of moving and fixed contacts |
mm |
3 |
|||||
|
19 |
Energy storage times |
S |
≤15 |
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|
20 |
Contactor space |
mm |
9± 1 |
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|
21 |
Contacting travel |
3---4 |
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|
22 |
Bounce time of Contactor during making |
ms |
≤2 |
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|
23 |
Different time of breaking / making of 3 phases |
≤2 |
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|
24 |
Average breaking speed |
0.9-1.3 |
||||||
|
25 |
Average making speed |
0.4-0.8 |
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|
26 |
Rebound amplitude of contact breaking |
mm |
≤3 |
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|
27 |
Conductance circuit resistance |
µΩ |
≤50 (630A) |
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|
≤45(1250A) |
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|
≤35(1600A-2000A) |
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|
≤25(More than 2500A) |
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|
28 |
The contacting pressure of of contactor during making |
N |
2000±200(20kA) |
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|
2400±200(35kA) |
||||||||
|
3100±200(31.5kA) |
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|
4750±250(40kA) |
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|
29 |
Rated operating sequence |
|
O- θ -CO-180s-CO |
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|
The average breaking speed is that of contactor’s first 6mm . The average making speed refers to the average speed of total Contactor space .When the rated short circuit breaking current is less than 40kA, θ is equal to 0.3S. When the short circuit breaking current is more than or equal to 40kA, θ is equal to 180S |
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Outline Dimension Drawing
Dear friends, pls contact us for the outline dimension drawing, we will give you quick reply.
Summary
The VMD1 series indoor circuit-breaker is our independent developed new generation 12 kv vacuuum circuit breaker .Its main characters as follows:the conductance circuitis installed in an three-phase insulating sleeve , its mechanism and conductance circuitadopts front and rear layout. And the mechanism is our deveoped new design, with simple construction, reliable operation, and rich manufacturing experiences of million sets , used and learned by many high-end vacuum circuit breaker manufacturers.
Technical Standards
All the technical parameters of breaker completely satisfythe Standards Of GB1984 AC Highvoltage Breaker, GB/T 11022 -1999 Common Specifications For High-Voltage Switchgear And Controlgear Standards, China Power Sector Standards DL403.
Also meet the requirements of IEC62271-100, IEC56 and other main industrialized country’s similar standards
Testing
VMD1 series circuit breaker have passed has passed following
test , to ensure the product’s safe Operation.
Type tests :power-frequency withstand voltage tests , lighting impact withstand voltage tests, , temperature rising tests, short-time withstand current tests , peak withstand current tests , short circuit breaking ability tests , mechanical lift tests, ect
Routine test before out of factory:mechanical performance test , power-frequency withstand voltage tests of the main circuit , insulating property tests on control and auxiliary circuits, measurement of ther resistance of the main circuit , interlock operatingtests , mechanical operating tests, Electrical Equipment operating tests.
Scope of application
It is universally used in power plant , electric network , metallurgy industrypetrochemical industry and infrastructures, such as airport , subway, building.
When the VMD1 circuit breaker is in distribution system, it can be applied to control and protect cable , trolly wire , transformer, generator and capacitor bank.
Safety
VMD1 circuit breaker possesses perfect mechanical and electric interlock equipment , meanwhile , its high reliable operatingperformance and mechanical life , coodinated with matched switchgear cabinet , to ensure normalpower distribution , operator and equipment’s safety.
More Information,Please See Our Official Website: www.meletek.com
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