YH5W-42/120 gapless metal-oxide surge arrester
27.5kV residual voltage at most 120kV
Specifications
| Model | YH5W-42/120 |
|---|---|
| Standard | GB/T 11032, AC gapless metal-oxide surge arresters, and traction power supply system technical conditions |
| Rated Voltage | 42kV (for 27.5kV systems) |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Metal-oxide varistor blocks, composite insulating housing |
| Installation | Installed at mast tops, substation exits and neutral sections |
YH5W-42/120 is a gapless composite-housing metal-oxide surge arrester for 27.5kV systems with lightning impulse residual voltage at most 120kV. Main technical parameters are shown in the table below.
| System nominal voltage | 27.5kV |
| Arrester rated voltage | 42kV |
| Continuous operating voltage | 34kV |
| DC 1mA reference voltage | ≥65kV |
| Lightning impulse residual voltage | ≤120kV |
| Steep-wave impulse residual voltage | ≤138kV |
| Switching impulse residual voltage | ≤98kV |
| 2msSquare-wave current withstand | 400A |
Performance
Operating Conditions
For lightning and switching overvoltage protection of the OCS, in long-term energized outdoor operation.
Mechanical Performance
The composite housing resists pollution and tearing with fully sealed moisture protection, and withstands lead-wire tension and wind loads.
Electrical Performance
Residual voltage at nominal discharge current and square-wave current withstand meet GB/T 11032; disconnector-equipped types detach automatically on fault.
Applications
substation exits
YH5W-42/120 gapless metal-oxide surge arresters protect against switching overvoltage at substation feeder exits.
lightning-prone sections
YH5W-42/120 gapless metal-oxide surge arresters discharge lightning overvoltage at mast tops in lightning-prone sections.
neutral sections
YH5W-42/120 gapless metal-oxide surge arresters limit overvoltage magnitude on both sides of neutral sections.
elevated urban rail sections
YH5W-42/120 gapless metal-oxide surge arresters provide lightning protection for elevated urban rail OCS.
