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[China]
Address: 21/F, Building 1, No. 816,Jinghua Road, Hi-tech Zone,Ningbo, Zhejiang, P.R. China
Contact name:Tony ma
Ningbo Tian'an Jinghua Power Technology Co., Ltd. |
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Indoor DC Sealed 4000A 12kV Indoor Vacuum Circuit Breaker VT19
General of Indoor DC Sealed 4000A 12kV Indoor Vacuum Circuit Breaker VT19
VT19-12 indoor HV vacuum circuit breaker is used in three-phase AC electric system of 50HZ,12kV. It is used as control and protection department in the mining company ,power factory and substation. Because of its special advantages, it is also suitable for the site which frequently operation under rated current or multiple breaking short-circuit current.
The circuit breaker is identified by some national standards and international relative standards, such as GB1984,GB/T11022,DL/T403 and IEC62271, etc. It has reliable lockage, used as truck department or fixed installation department.
Main Characteristics of Indoor DC Sealed 4000A 12kV Indoor Vacuum Circuit Breaker VT19
Rated voltage from 72,5 to 550kV
Reliable in adverse operating conditions such as high winds and
heavy ice
Always stable in the close position during short circuits
Rigid and well supported terminal pads permit post insulators and
additional space savings
Galvanized structural steel channel base assures high strength and
rigid design
Supplied or easily retro-fitted with 1 or 2 earthing switches
Customised solutions available: vertical, under hung and
phase-to-phase
Specifications of Indoor DC Sealed 4000A 12kV Indoor Vacuum Circuit Breaker VT19
1. Can used in three-phase AC 50Hz, 24kVelectric power system,
2. Can used in the equipment of mining and industry, enterprise,
power plants and substations for protect and control.
3. Can used in KYN28A-24(GZS) switchgear cabinet and XGN fixed type
switchgear cabinet.
4. Has advanced vacuum arcing chamber.
5. Insulation cylinder made by APG new technology
6.Confirmed to GB1984-2003, GB/T11022-1999, IEC62271-100 , DL/403
.
The main parameter of Indoor DC Sealed 4000A 12kV Indoor Vacuum Circuit Breaker VT19
| Rated voltage | 12kV | ||||
| Rated frequency | 50Hz | ||||
| Rated lighting impulse withstand voltage(between phases,phase to earth) /isolated fracture | (75) / 85kV (peak value) | ||||
| Rated 1min power withstand voltage(between phases,phase to earth) /isolated fracture | (42) / 48kV (r. m. s) | ||||
| Rated operation sequence | O-0.3s-CO-180s-CO | ||||
| Rated current (A) | 630,1250 | 1250~3150 | 1250~3150 | 3150,4000 | |
| Rated short circuit breaking current (r. m. s, kA) | 20/25 | 31.5 | 40 | 50 | |
| Rated short circuit making current (peak value, kA) | 50/63 | 80 | 100 | 125 | |
| Rated short time withstand current/short circuit continuous time (kA/s) | 20,25/4 | 31.5/4 | 40/4 | 50/4 | |
| Rated peak withstand current (kA) | 50/63 | 80 | 100 | 125 | |
| Breaking times of rated short circuit current(times) | 30 | 30 | 30 | 20 | |
| Mechanical duration (times) | 20000 | 20000 | 10000 | 10000 | |
| Weight (kg) | Fixed type | ≤200 | |||
| Truck type | ≤250 | ||||
