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Product Description
| S/N | TECHNICAL DETAILS | UNITS | DATA | |
| 1. | Type | 33kV gapless type metal oxide surge arrester - Distribution class | ||
| 2. | Nominal system voltage | kV | 33 | |
| 3. | Highest system voltage | kV | 36 | |
| 4. | Power frequency | Hz | 50 | |
| 5. | Basic Insulation Level (BIL) | kV | 170 | |
| 3. Ratings and type of surge arrester | ||||
| 6. | Specification to which surge arrester complies | IEC 60099 | ||
| 7. | Rated voltage of surge arrester | kV | 29 | |
| 8. | Nominal, 8/20 µs, discharge current rating of surge arrester | kA | 10 | |
| 9. | Maximum continuous operating voltage of surge arrester | kV | 22 | |
| 10. | Gapless or gapped type metal-oxide surge arrester | Gapless | ||
| 11. | Insulation Material | Silicon rubber | ||
| 12. | Cantilever strength of surge arrester | Nm | 300 | |
| 13. | Rated frequency of surge arrester | Hz | 50 | |
| 14. | Design altitude of surge arrester (above sea level) | m | 1 400m | |
| 15. | Design ambient temperature of surge arrester | oC | -1 to 40 | |
| 16. | Minimum phase-to-ground specific creepage distance of surge arrester | .mm/kV | 25 | |
| Automatic earth lead disconnectors requirements | ||||
| 17. | Automatic earth lead disconnectors fitted | Yes/No | Yes | |
| 18. | Corrosion protection of metal and alloy parts: galvanising | To SABS 763, 316 | ||
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