High Voltage Vacuum Load Isolation Switch FZN/FZRN25-12DG/125-31.5 - China Factory Suppliers for 12kV Systems
High Voltage Vacuum Load Isolation Switch FZN/FZRN25-12DG/125-31.5 - China Factory Suppliers for 12kV Systems
⚙️ Technical Specification
| No. | Item | Units | Vacuum Load Isolation Switch | Vacuum Load Isolation Switch – Fuse Combinations FZN25-12DG/T200-31.5 |
|
| FZN25-12DG/T630-25 | FZN25-12DG/T1250-25 | ||||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated frequency | Hz | 50 | ||
| 3 | Rated current | A | 630 | 1250 | 200 |
| 4 | Rated short time withstand current | kA | 25 | ||
| 5 | Rated peak withstand current | kA | 63 | ||
| 6 | Rated short-circuit current | kA | 63 | 80 | |
| 7 | Rated active load breaking current | A | 1250 | 1250 | |
| 8 | Rated closed loop breaking current | A | 1250 | 1250 | |
| 9 | Breaking load transformer | kVA | 2000 | ||
| 10 | Ground fault current | A | 20 | ||
| 11 | Line and cable charging current under earth fault conditions | A | 20 | ||
| 12 | Rated short circuit breaking current | kA | 31.5 / 50 (by the fuse may be) | ||
| 13 | Rated over current / transfer current | A | 3150 | ||
| 14 | Solid divided time | ms | 45 | ||
| 15 | Power frequency withstand voltage (1 min) | kV | White, contrast, vacuum fracture: 42 | Isolated fracture between: 48 | ||
| 16 | Lightning impulse withstand voltage | kV | White, contrast, vacuum fracture: 75 | Isolated fracture between: 85 | ||
| 17 | Mechanical life | Times | > 10,000 | ||
🔌 Product Model
Vacuum Load Isolation Switch
Vacuum Load Isolation Switch – Fuse Combinations
📐 Dimension
❓ Frequently Asked Questions
Q
What is the rated voltage of the FZN25-12DG vacuum load isolation switch?
The rated voltage of the FZN25-12DG series vacuum load isolation switch is 12 kV, making it suitable for medium-voltage distribution systems operating at this voltage level.
Q
What is the difference between the FZN25-12DG/T630-25 and FZN25-12DG/T1250-25 models?
The primary difference lies in their rated current capacity. The T630-25 model supports a rated current of 630 A, while the T1250-25 model supports a higher rated current of 1250 A. Both share the same rated voltage, frequency, and short-time withstand current ratings.
Q
What is the rated short circuit breaking current for the fuse combination model FZN25-12DG/T200-31.5?
The fuse combination model FZN25-12DG/T200-31.5 has a rated short circuit breaking current of 31.5 kA / 50 kA (depending on the fuse used). This capability is provided by the integrated fuse element within the combination unit.
Q
What is the mechanical life expectancy of the FZN25-12DG vacuum load isolation switch?
The mechanical life of the FZN25-12DG series is rated at more than 10,000 operations, ensuring long-term reliability and reduced maintenance requirements in demanding electrical distribution environments.
Q
What are the power frequency and lightning impulse withstand voltage values?
For power frequency withstand voltage (1 min), the vacuum fracture is rated at 42 kV and the isolated fracture between phases is 48 kV. For lightning impulse withstand voltage, the vacuum fracture is rated at 75 kV and the isolated fracture between phases is 85 kV.
Q
What is the rated active load breaking current and closed loop breaking current for these switches?
Both the rated active load breaking current and the rated closed loop breaking current are 1250 A across all models in the FZN25-12DG series, including the vacuum load isolation switch variants and the fuse combination model.