Integrated NU-GFV-12-630-20 Circuit Breaker for Modern GIS Cabinets
Description du produit
The NU-GFV-12-630-20 Circuit Breaker is a high-performance vacuum arc-extinguishing solution designed specifically for 12kV/630A environmentally friendly gas-insulated switchgear. This switch features an innovative integrated structure that combines an isolating switch and a circuit breaker, significantly simplifying installation and maintenance. By utilizing a vacuum chamber for arc suppression, it ensures high safety, stable performance, and the ability to interrupt short-circuit currents up to 20kA, meeting the rigorous standards of GB/T1984-2014.
Applications
- Core component for 12kV eco-friendly gas-insulated switchgear (GIS) cabinets.
- Designed to interrupt load currents and protect against short-circuit faults in industrial and grid networks.
- Flexible configurations (Isolator top/VCB bottom or vice versa) to meet diverse power supply needs.
Paramètres techniques
| Non. | Objet | Unité | Paramètres | Remark |
| 1 | Tension nominale | kV | 12 | |
| 2 | Courant nominal | A | 630 | |
| 3 | Rated short-time withstand current | kA/s | 20/4, 25/4 | |
| 4 | Courant nominal de rupture en court-circuit | kA | 20 | |
| 5 | Courant de résistance nominal de crête | kA | 50/63 | |
| 6 | Courant nominal de fermeture en cas de court-circuit | kA | 50/63 | |
| 7 | Short-circuit closing times | fois | 30 | |
| 8 | Power frequency withstand voltage: Ground/Phase-to-Phase | kV | 42 | In dry air or N₂ |
| 9 | Power frequency withstand voltage: Fracture | kV | 48 | In dry air or N₂ |
| 10 | Lightning impulse withstand voltage: Ground/Phase-to-Phase | kV | 75 | In dry air or N₂ |
| 11 | Lightning impulse withstand voltage: Fracture | kV | 85 | In dry air or N₂ |
| 12 | Main circuit resistance | µΩ | ≤ 65 | Circuit breaker switch + Isolation switch |
| 13 | Mechanical life of the interrupter | fois | 10000 | |
| 14 | Mechanical life of isolation/earthing switch | fois | 5000 |
Dessin
Upper isolation breaker switch outline and mounting dimensions


FAQ for Integrated GIS Circuit Breakers
- Q: What are the installation benefits of this Integrated VCB and Isolator?
A: The integrated structure reduces the cabinet footprint, simplifies the linkage mechanism, and allows for much faster on-site installation.
- Q: How does the “Vacuum Arc-Extinguishing” benefit the switchgear?
A: It ensures a maintenance-free arc suppression process with high electrical life and zero environmental pollution, perfectly matching “eco-friendly” GIS requirements.
- Q: Is the NU-GFV-12-630-20 suitable for environmentally demanding sites?
A: While designed for gas-insulated cabinets, if you need measurement capabilities in the same cabinet, consider adding our NU-GFPT-12-630 PT Switch.
Inquire Now for technical specifications and bulk pricing for the NU-GFV-12-630-20.















