ETK-TZJB type transformer neutral point gap grounding protection device is a protection device produced for the neutral point ground of 220kV and 110kV transformer windings.
ETK-TZJB type transformer neutral point gap grounding protection device is a protection device produced for the neutral point ground of 220kV and 110kV transformer windings.
| Product Model | ETK-TZJB-110 | ETK-TZJB-220 | |
|---|---|---|---|
| Product Model | ETK-TZJB-110 | ETK-TZJB-220 | |
| Transformer rated voltage kV | 110 | 220 | |
| Neutral point withstand voltage of transformer | Lightning impact withstand voltage kV (Peak) | 250 | 450 |
| Neutral point withstand voltage of transformer | 1min power frequency withstand voltage kV (effective value) | 95 | 200 |
| Disconnector | Model number | GW13-72.5W | GW13-126W |
| Disconnector | Rated current A | 630 | 630 |
| Disconnector | Operating mechanism | Manual mechanism or electric | Manual mechanism or electric |
| Zinc oxide lightning arrester | Model number | HY1.5W-72/186 | HY1.5W-144/320 |
| Zinc oxide lightning arrester | Rated voltage kV (effective value) | 72 | 144 |
| Zinc oxide lightning arrester | Continuous operating voltage kV | 58 | 116 |
| Zinc oxide lightning arrester | 8/20μs lightning impulse | ≤186 | ≤320 |
| Discharge gap | form; shape | Bar gap or spherical gap | Bar gap or spherical gap |
| Discharge gap | clearance distance mm | 90~135 | 250~320 |
| Discharge gap | Working frequency discharge | 50~63 | 100~127 |
| Current transformer | Type; Form; | Epoxy resin casting fully | Epoxy resin casting fully |
| Current transformer | turn ratio | 100/5、200/5、300/5、400/5、 | 100/5、200/5、300/5、400/5、 |
Main features
