Description
The YZFN-10 (20) series load switch is suitable for integrated transformers with AC frequencies of 50Hz and 60Hz and a rated voltage of 20kV. It uses transformer oil as the insulation and arc-extinguishing medium, and the operating mechanism is a spring energy storage device. With three-phase linkage, it can accurately and quickly make or break the rated load current. It serves as a control and protection device for industrial and civilian electrical energy in ring-main power supply and dual-power supply systems.
The load switch has four modes for connecting the power supply to the transformer: ring-main power supply, busbar 1 power supply, busbar 2 power supply, and disconnection. According to the power supply line switching requirements, the load switch is rotated clockwise or counterclockwise using a dedicated operating lever. Each operation rotates the switch by 90° to change position, and it can cycle through 360° of rotation. The switch is available in T-type, R-type, S-type, H-type, V-type, and terminal types. Users can select according to their needs.
| Serial Number |
Name | Unit | YZFN-20/315-R | YZFN-20/630-R | |
| 1 | Ratedvoltage | KV | 24 | ||
| 2 | Power Frequency withstand voltage | Ground, interphase |
KV | 55 | |
| Isolating distance |
KV | 60 | |||
| 3 | Lightning Impulse withstand voltage | Ground, interphase |
KV | 125 | |
| Isolating distance |
KV | 145 | |||
| 4 | Ratedcurrent | A | 315 | 630 | |
| 5 | Rated Short-circuit withstand current 2S | KA | 20 | 20 | |
| 6 | Rated Peak withstand current | KA | 50 | 50 | |
| 7 | Main Circuit Resistance | μΩ | <320 <320 |
<200 <200 |
|
| Operating torque | N.m | ＜50 < 50 |
|||
| 8 | Mechanical Life | Number of times | >2000 | ||
