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Indoor Vacuum Switch Switch FZ(R)N25-12 Series
The indoor high voltage AC vacuum load switch type FZN25-12D (hereinafter referred to as the load switch) and the combined device - indoor high voltage AC vacuum load switch with fuse type FZRN25-12D (hereinafter referred to as the combined device) are control and protection devices in three-phase AC 50 Hz, 12 kV distribution systems.
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Product Description
The indoor high voltage AC vacuum load switch type FZN25-12D (hereinafter referred to as the load switch) and the combined device - indoor high voltage AC vacuum load switch with fuse type FZRN25-12D (hereinafter referred to as the combined device) are control and protection devices in three-phase AC 50 Hz, 12 kV distribution systems. They are widely used in industrial and mining plants, as well as in urban and rural distribution stations and buildings. The combined device consists of a load switch and a fuse and provides protection for transformers and other electrical equipment.
| No. | Parameter name | Unit change | Meaning | ||
| FZN25-12D/T630-20 | |||||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated current | A | 630 | ≤125 | |
| 3 | Rated frequency | Hz | 50 | ||
| 4 | Rated insulation level (power frequency test voltage for 1 min) | kV | Arc chamber (break): 30; between terminals and between phases: 75; breaking distance: 48 | ||
| Nominal insulation level (lightning impulse test voltage - peak) | kV | Between terminals and between phases: 75; breaking distance: 85 | |||
| 5 | Rated short-time current (thermal resistance) | kA | 20 | 31.5 | |
| 6 | Short circuit current duration | with | 4 | 4 | |
| 7 | Rated peak current of electrodynamic resistance (dynamic resistance) | kA | 50 | 80 | |
| 8 | Rated active load breaking current | A | 630 | 125 | |
| 9 | Rated closed circuit breaking current | A | 630 | 125 | |
| 10 | Rated cable charging current interruption current | A | 10 | ||
| 11 | Breaking capacity for unloaded transformer | kVA | 1600 | ||
| 12 | Rated short circuit breaking current | kA | 20 | 31.5 | |
| 13 | Rated transmission current | A | 2000 | ||
| 14 | Fuse type | SDLAJ-12/SFLAJ-12 | |||
| 15 | Impact energy | J | 2-5 | ||
| 16 | Rated short-circuit inrush current (peak) | kA | 50 | 80 | |
| 17 | Rated short-term current of the grounding blade (thermal resistance) | kA | 20 | ||
| 18 | Duration of short circuit current of the grounding knife | with | 2 | ||
| 19 | Rated peak current of the electrodynamic resistance of the grounding blade (dynamic resistance) | kA | 50 | ||
| 20 | Rated voltage of auxiliary circuits | B | =200 | =100 | |
| 21 | Mechanical wear resistance | cycles | 10000 | ||
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