Audited Supplier
VCB-F
High Voltage Circuit Breakers
Manual Type or Electric Type
Normal Type Circuit Breaker
Vacuum
Fixed or Insert
ACB
3
Circuit Breaker
Conventional Circuit Breaker
ISO9001-2000
Customizable
Yes
Old Fashioned Circuit Breaker to Figure Custom
7.2-12, 24, 36kv
VKJ
According to The Packaging Requirements of The Imp
1250A-31.5KA/4000A-50KA
China
8535210000
Product Description
Shanghai Kaiji Power Equipment Co., Ltd,which is located at #777 Yuegong Road, Jinshan Industrial Zone, Shanghai, is in the core area of "Yangtze River Delta". The unique location advantage builds good development platform and make manufacturing capacity and quality assurance capabilities to reach the international leading level.
Shanghai Kaiji specializes in manufacturing different kind of indoor high voltage vacuum circuit breakers, the main products are VKJ series with 7.2 KV - 24 KV - 35 KV and special circuit breaker lift vehicles.
Based on quality for growth, technology for development and service for market, our company always insists on such business philosophy. Shanghai Kaiji is willing to work with friends from home and abroad to develop together and win-win cooperation.
Shanghai Kaiji specializes in manufacturing different kind of indoor high voltage vacuum circuit breakers, the main products are VKJ series with 7.2 KV - 24 KV - 35 KV and special circuit breaker lift vehicles.
Based on quality for growth, technology for development and service for market, our company always insists on such business philosophy. Shanghai Kaiji is willing to work with friends from home and abroad to develop together and win-win cooperation.
Technical data
- Main technical parameters of Model VKJvacuum breaker
| No. | Parameter designation | Unit | Data | |||||||
| 1 | Rated voltage | kV | 12 | |||||||
| 2 | Rated insulation level | Power frequency withstand voltage at 1 min | kV | 42 | ||||||
| Rated lightning impulse withstand voltage | kV | 75 | ||||||||
| 3 | Rated current | A | 630 | 1000 | 1250 | 1600 | 2000 | 2500 | 3150 | |
| 4 | Rated short circuit breaking current (effective value) Rated short time withstand current (effective value) | kA | 20 | 20 | 20 | |||||
| 25 | 25 | 25 | 25 | |||||||
| 31.5 | 31.5 | 31.5 | 31.5 | |||||||
| 40 | 40 | 40 | 40 | 40 | ||||||
| 50 | 50 | 50 | 50 | |||||||
| 5 | Rated short circuit closing current (peak value) Rated peak withstand current (peak value) | kA | 50 | 50 | 50 | |||||
| 63 | 63 | 63 | 63 | |||||||
| 80 | 80 | 80 | 80 | |||||||
| 100 | 100 | 100 | 100 | 100 | ||||||
| 125 | 125 | 125 | 125 | |||||||
| 6 | Rated short circuit breaking current breaking times | Times | 30.50x | |||||||
| 7 | Rated short circuit duration | s | 1 | |||||||
| 8 | Rated operating sequence | O-0.3s-CO-180s-CO | ||||||||
| 9 | Mechanical life | Times | 30000 | |||||||
| 10 | Rated single capacitor bank breaking current | A | 630 | |||||||
| 11 | Rated back to back capacitor bank breaking current | A | 400 | |||||||
Note:
- When rated short circuit breaking current ≤31.5kA, rated short circuit breaking times is 50 times.
- When rated short circuit breaking current is 50kA, rated operating sequence is: O-180s-CO.180s. CO.
- Mechanical characteristic parameters after breaker is assembled and adjusted
| No. | Parameter designation | Unit | Data | ||||
| 1 | Contact opening distance | mm | 11±1 | ||||
| 2 | Contact travel | mm | 3.5±0.5 | ||||
| 3 | Three phase switch on/off asynchroneity | ≤2 | |||||
| 4 | Bounce time of switch-on contact | ms | ≤2(for 40kA and above ≤3) a | ||||
| 5 | Center distance between phases | mm | 210±1.5 (275+1.5) a | ||||
| 6 | Rated short circuit breaking current | kA | 20 | 25 | 31.5 | 40 | 50 |
| 7 | Contact pressure of switch-on contact | N | 2000±200 | 2400±200 | 3100±200 | 4500±200 | 6000±200 |
| 8 | Average switch-off speed | m/s | 0.9~1.3 | ||||
| 9 | Average switch-on speed | m/s | 0.5~0.9 | ||||
| 10 | Breaking time | ms | 30±10 | ||||
| 11 | Closing time | ms | 50±10 | ||||
| 12 | Main circuit resistance in each phase of breaker b | µΩ | ≤40 | ||||
| 13 | Main circuit resistance in each phase of breaker and cart c | µΩ | ≤55 | ||||
| 14 | Bounce range of contact switch-off | mm | ≤1 | ||||
| 15 | Allowable abrasion thickness of dynamic and static contact | mm | ≤3 | ||||
Note:
- What in the parentheses is for product with rated current of 2500A and above.
- Main circuit resistance of breaker is resistance between upper and lower outgoing lines.
- Main circuit resistance of breaker cart is the resistance between upper and lower moving contacts.
- See Figure 3 and Table 3 for parameters of draw-out type breaker unit with binding type primary contact:
| Rated voltage (kV) | 12 | 12 | 12 | 12 | 12 | 12 |
| Rated current A | 630/1000 | 1250 | 1600 | 2000 | 2500/3150 | 4000/5000 |
| Moving contact arm closing circle D1 | 28 | 42 | 48/72 | 72 | 102 | 102 |
| Static contact arm closing circle D2 | 35 | 49 | 55/79 | 79 | 109 | 109 |
| Diameter of max. excircle D3 | 74 | 87 | 94/128 | 128 | 158 | 158 |
| Number of moving contact stylus | 24 | 30 | 36/48 | 48 | 64 | 82 |
Figure 3 Dimensions Related to Fitting of Moving and Static Contacts
- See Figure 4 for schematic diagram of secondary wiring of vacuum breaker:
Actuator of this breaker could be driven by AC or DC.
- Technical data of energy storage motor
This product adopts permanent-magnet type single direction DC motor with special speed reducer; change gear in the reducer is enclosed in a case filled with lubricating grease, output speed is 10r/min. Torque 25N.m. See the following Table 4 for technical parameters of motor.
Table 4
| Model | Rated voltage (V) | Rated output power (W) | Normal working voltage range (V) | Energy storage time at rated voltage (s) |
| HDZ-70-30B | DC110 DC220 | 80 | 85%-110% rated voltage | ≤15 |
- See Figure 5 for technical data of switching on/off electromagnet
| Switch on/off electromagnet | ||
| Rated operating voltage (V) | DC220 | DC110 |
| Coil power (W) | 244 | 366 |
| Rated current (A) | 1.11 | 3.33 |
| Current resistance (Ω) | 198 | 33 |
| Operating voltage range | Switch off 65%-120% rated voltage | switch on 85%-110% rated voltage |
