中文
Manager Zhou
Leave a message
Product Overview
The VZG-12GD series indoor high-voltage three station vacuum circuit breaker has excellent electrical and mechanical performance, reliable and stable mechanism, and long service life. The main circuit adopts fixed sealing columns, which improves the environmental adaptability and insulation reliability of the circuit breaker; Reliable mechanical and electronic performance, extended mechanical and electronic lifespan, make maintenance free Circuit breakers possible. It can be used in 3.6-12kV power systems as a power grid equipment and a protection box control unit for power design in industrial and mining enterprises. It is suitable for various types of loads and frequent operations, as well as situations where short-circuit currents are disconnected multiple times. The product has complete mechanical and electrical interlocking devices, with high operational stability and reliability, ensuring the safety of operators and electrical safety.
◆ Adopting fixed sealing technology.
The product adopts a modular design: a frame structure that integrates high-performance miniaturized high-voltage electrical products such as isolation switches, sealed Vacuum Circuit Breakers, Grounding switches, sensors, interlocking mechanisms, and operating mechanisms.
The compatible cabinet size is (450x1000x1800) mm.
◆ Rotary isolation switch, with visible fracture after opening.
There is a mandatory mechanical interlock between the isolation switch, circuit breaker, and grounding switch to prevent misoperation.
The circuit breaker adopts a modular operating mechanism, which can be independently replaced or maintained, and has good interchangeability. It can be operated manually or remotely controlled through AC or DC energy storage operation.
The cabinet door and grounding switch are designed with a reliable interlocking structure to ensure the safety of operators.
Technical Parameter
| Item | Unit | Data | ||
| Rated voltage | kv | 12 | ||
| (1 minute) Rated short-time power frequency withstand voltage: phase to phase/fracture | 42/48 | |||
| Rated lightning impulse withstand voltage (peak): phase to phase/fracture | 75/85 | |||
| Secondary circuit power frequency withstand voltage (1min) | V | 2000 | ||
| Rated frequency | Hz | 50 | ||
| Rated current | A | 20 | 25 | 31.5 |
| Rated short-circuit breaking current | kA | 50 | 63 | 80 |
| Rated peak withstand current | kA | 50 | 63 | 80 |
| Rated short-circuit closing current | kA | 20 | 25 | 31.5 |
| 4s rated short-time withstand current | kA | 20 | 25 | 31.5 |
| Rated short-time withstand current duration | S | 4 | ||
| Rated breaking current of single/back-to-back capacitor bank | A | 630/400 | ||
| Rated capacitor bank closing inrush current | kA | 12.5 (frequency not exceeding 1000Hz) | ||
| Rated short-circuit current breaking times | times | 30 | ||
| Mechanical lifespan (isolating switch/circuit breaker/grounding switch) | 3000/10000/3000 | |||
| Allowable cumulative thickness of wear for dynamic and static contacts | mm | 3 | ||
| Rated closing operation voltage | V | AC24/48/110/220 DC24/48/110/220 | ||
| Rated opening operation voltage | ||||
| Rated voltage of energy storage motor | V | AC24/48/110/220 DC24/48/110/220 | ||
| Rated power of energy storage motor | W | 70 | ||
| Energy storage time | S | 15 | ||
| Contact opening distance | mm | 9±1 | ||
| Overtravel | 3.5±1 | |||
| Contact closing bounce time | ms | ≤2 | ||
| Three phase asynchronous opening and closing | ≤2 | |||
| Opening time (rated voltage) | 40 | |||
| Closing time (rated voltage) | 60 | |||
| Average opening speed (contact just opened~6mm) | m/s | 0.9~1.3 | ||
| Average closing speed (6mm~just closed contact) | 0.5~1.1 | |||
| Contact opening rebound amplitude | mm | ≤2 | ||
| Contact closing contact pressure | N | 2400±200(20-25kA)3100+200(31.5kA) | ||
| Rated operating sequence | O-0.3s-CO-180s-CO | |||
Installation size
Inquiries and Considerations
When contacting suppliers for the VZG-12GD, confirming the following details will help ensure you get the correct product for your project:
- Specify Key Parameters: Clearly state the required Rated Current and Rated Short-Circuit Breaking Current, as these are core performance metrics.
- Clarify Operating Voltage: Confirm the Rated Operational Voltage for the control mechanism (e.g., AC or DC 110V/220V).
- Request Full Documentation: Ask for detailed technical datasheets, type test reports, and installation manuals to verify all specifications and compliance with standards like GB or IEC.
- Confirm Configuration: Discuss any additional needs, such as the type and quantity of spare parts.
I hope this overview helps you understand the VZG-12GD Indoor High Voltage Three Station Vacuum Circuit Breaker. If you have specific current rating requirements or need further details on any particular feature, feel free to ask!
Test report
RELATED
RELATED
RELATED
RELATED
Oil&Gas exploited
Automotive Manufacturing
Transportation & Dlistrlbutlon
Manufacture
Industrial Construction
Green Energy
Copyright ? 2024 All Rights Reserved
Back to top 
Comment
（0）