China VMD1-12 assemble pole vacuum circuit breaker,VMD1-12 assemble pole vacuum circuit breaker Manufacturer
Operating Mechanism
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The VMD1 series indoor circuit-breaker is our independent developed new generation 12 kv assemble pole kind vacuuum circuit breaker .
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 | 12 | |||||||
| 2 | Rated insulating level | Rated short time power frequency withstand voltage(1min) | 42 | |||||||
| Rated lighting inpulse withstand voltage (peak value) | 75 | |||||||||
| 3 | Rated Frequency | Hz | 50 | |||||||
| 4 | Rated current | A | 630 | 630 | 1250 | 1250 | ||||
| 1250 | 1250 | 1600 | 1600 | |||||||
| 2000 | 2000 | |||||||||
| 2500 | 2500 | |||||||||
| 3150 | 3150 | |||||||||
| 4000 | 4000 | |||||||||
| 5 | Rated short circuit breaking current | kA | 20 | 25 | 31.5 | 40 | ||||
| 6 | Rated short time withstand current | 20 | 25 | 31.5 | 40 | |||||
| 7 | Rated peak withstand current | 50 | 63 | 80 | 100 | |||||
| 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 | |||||
| 10 | Rated shock steady current | 50 | 63 | 80 | 100 | |||||
| 11 | Rated making surge current of capacitor bank | 12.5(The frequency is less than 1000Hz) | ||||||||
| 12 | Rated breaking current of single/symmetrical capacitor bank | A | 630/400 (The value shoule be 800/400 while the current is 40kA) | |||||||
| 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 | |||||||
| Breaking coil | AC110/220 DC110/220 | |||||||||
| Energy-storage motor | AC110/220 DC110/220 | |||||||||
| 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 | |||||||
| 20 | Contactor space | mm | 9± 1 | |||||||
| 21 | Contacting travel | 3---4 | ||||||||
| 22 | Bounce time of Contactor during making | ms | ≤2 | |||||||
| 23 | Different time of breaking / making of 3 phases | ≤2 | ||||||||
| 24 | Average breaking speed 1 | 0.9-1.3 | ||||||||
| 25 | Average making speed 2 | 0.4-0.8 | ||||||||
| 26 | Rebound amplitude of contact breaking | mm | ≤3 | |||||||
| 27 | Conductance circuit resistance | μΩ | ≤50 (630A) | |||||||
| ≤45(1250A) | ||||||||||
| ≤35(1600A-2000A) | ||||||||||
| ≤25(More than 2500A) | ||||||||||
| 28 | The contacting pressure of contactor during making | N | 2000±200(20kA) | |||||||
| 2400±200(25kA) | ||||||||||
| 3100±200(31.5kA) | ||||||||||
| 4750±250(40kA) | ||||||||||
| 29 | Rated operating order | O- 180s -CO-180s-CO/O- 0.3s -CO-180s-CO | ||||||||
