China VMD4-24 vacuum circuit breaker,VMD4-24 vacuum circuit breaker Manufacturer
Operating Mechanism
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The VMD4 series indoor circuit-breaker is our new generation 24 kv embedded pole kind vacuuum circuit breaker ,We independent developed it as per ABB VD4 size .
All the technical parameters of breaker completely satisfy the 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
| NO | Item | Unit | Technical Date | |||||||
| 1 | Rated voltage | kV | 24 | |||||||
| 2 | Rated insulating level | Rated short time power frequency withstand voltage(1min) | 65 | |||||||
| Rated lighting inpulse withstand voltage (peak value) | 125 | |||||||||
| 3 | Rated Frequency | Hz | 50 | |||||||
| 4 | Rated current | A | 630 | 630 | 1250 | |||||
| 1250 | 1250 | 1600 | ||||||||
| 2000 | ||||||||||
| 2500 | ||||||||||
| 5 | Rated short circuit breaking current | kA | 20 | 25 | 31.5 | |||||
| 6 | Rated short time withstand current | 20 | 25 | 31.5 | ||||||
| 7 | Rated peak withstand current | 50 | 63 | 80 | ||||||
| 8 | 4S rated short-time withstand current | 20 | 25 | 31.5 | ||||||
| 9 | Rated shock steady current | 50 | 63 | 80 | ||||||
| 10 | Rated short-circuit closing current (peak value) | 50 | 63 | 80 | ||||||
| 11 | Duration of rated short-circuit current | S | 4 | |||||||
| 12 | Mechanical life | Times | 20000(M2) | |||||||
| 13 | Rated making surge current of capacitor bank | kA | 12.5(The frequency is less than 1000Hz) | |||||||
| 14 | Rated breaking current of single/symmetrical capacitor bank | A | 630/400 | |||||||
| 15 | Breaking times at rated short-circuit current | Times | 274 times (E2) | |||||||
| 16 | Power frequency withstand voltage of secondary circuit | V | 2000 | |||||||
| 17 | Rated operating voltage | AC110/220 | DC110/220 | |||||||
| 18 | Rated operating order | O-0.3s-CO-180s-CO | ||||||||
| 19 | Energy storage times | S | ≤15 | |||||||
| 20 | Contactor space | mm | 13± 1 | |||||||
| 21 | Contacting travel | 4 ± 1 | ||||||||
| 22 | Pole distance | 210 ± 1.5/275±1.5 | ||||||||
| 23 | Bounce time of Contactor during making | ms | ≤2 | |||||||
| 24 | Different time of breaking / making of 3 phases | ≤2 | ||||||||
| 25 | Average breaking speed | m/s | 1.1-1.7 | |||||||
| 26 | Average making speed | 0.6-1.1 | ||||||||
| 27 | Making time | ms | ≤60 | |||||||
| 28 | Brealing time | ≤45 | ||||||||
| 29 | Rebound amplitude of contact breaking | mm | ≤3 | |||||||
| 30 | Permitted abrasion thickness of moving and fixed contacts | 3 | ||||||||
| 31 | Conductance circuit resistance | μΩ | Handcart way | Rated current | ||||||
| ≤45 | 630-1250A | |||||||||
| ≤35 | 1600-2000A | |||||||||
| ≤25 | more than 2500A | |||||||||
