Product name:FZRN -40.5/50-20 Vacuum Disconnect Load
Break Switch and Fuse Combination Apparatus
Summary
FZRN -40.5/50-20 vacuum disconnect load break switch and fuse combination apparatus is used for 35kV substation, small volume, convenience for installation,especially for no power-supply area, it is easy and safe for changing the fuse.
Ambient condition
1. Altitude: 1000m;
2. Ambient temperature: -40 ~+40 ;
3. Relative humidity: daily average 95 , monthly average 90 ;
4. Earthquake intensity: 8 degree;
5. Pollution grade: degree.
Structure feature
The short-circuit breaking current can up to 20kA, long mechanism life, there is an security linkage between main switch, disconnect blade and earthing blade, it can operate frequently. It according to the standard of GB16927, IEC420 & IEC62271-105.
| No. | Item | Unit | Combination apparatus | Load break switch |
| 1 | Rated voltage | kv | 40.5 | 40.5 |
| 2 | Rated current | A | 50 | 1250 |
| 3 | Rated power frequency | HZ | 50/60 | 50/60 |
| 4 | Rated short-circuit breaking current | KA | 20 | * |
| 5 | Rated short-circuit making current | * | 40 | |
| 6 | Rated peak withstand current | * | 40 | |
| 7 | Rated short-time withstand current | * | 16 | |
| 8 | Rated transfer current | A | 2000 | * |
| 9 | Rated connect current | 2000 | * | |
| 10 | Rated active load breaking current | * | ||
| 11 | Rated short-circuit duration | S | * | 4 |
| 12 | Rated short-time(1min) P.F. withstand voltage | KV | phase to phase, to earth and normal gaps: 95 | |
| disconnect gaps:115 | ||||
| 13 | Rated lightning impulse withstand voltage(peak) | phase to phase, to earth and normal gaps:185 | ||
| disconnect gaps: 215 | ||||
| 14 | Circuit resistance | u Ω | 80 | 80 |
