Yh10W-12, Sharp Head 20ka Surge Arrester
Features
Better Electrical performance & reliability
Ease of Installation-Light weight & smaller size
Better Operating conditions
Explosion & shatter proof & less mechanical
damage to nearby equipments
Better performance in polluted environment
Vandalism resistant
Free from Moisture ingress
Higher safety
Higher mechanical strength
Insensitive to UV radiation
High resistance to Ozone & Corona
Excellent Tracking resistance
Performance Data
Performance Data
System Voltage
Rated Voltage (kV):0.1-275
Nominal discharge current (kA)
High current capability (4/10us) kA
Energy Class :
Energy absorption Capability kJ/kV
Short Circuit (Pressure relief) kA:40
Standard in accordance with:IEC60099-4
| No. | DETAIL | UNITS | DATA |
| Type | 11kV gaplesstype metal oxide surge arrester - Distributionclass |
||
| 1. | Nominalsystem voltage | kV | 11 |
| 2. | Highestsystem voltage | kV | 12 |
| 3. | BasicInsulationLevel(BIL) | kV | 95 |
3. Ratings and type ofsurge arrester |
|||
| 4. | Specification to which surgearrestercomplies | IEC 60099-4 |
|
| 5. | Rated voltage of surgearrester | kV | 10 |
| 6. | Nominal, 8/20µs, dischargecurrentrating of surgearrester |
kA | 10 |
| 7. | Maximum continuous operating voltage of surgearrester |
kV | 7.3 |
| 8. | Gapless or gappedtype metal-oxide surge arrester |
Gapless | |
| 9. | Material of insulation | High temperature vulcanised silicon rubber |
|
| 10. | Ratedfrequency of surgearrester | Hz | 50 |
| 11. | Design altitude of surgearrester(above sea level) |
m | 1 400m |
| 12. | Design ambienttemperature of surgearrester | oC | -1 to40 |
| 13. | Specificcreepage distance of surgearrester | .mm/kV | 25 |
| Automaticearth leaddisconnectors requirements |
|||
| 14. | Automaticearth lead disconnectors to be fitted | Yes/No | YES |
| 15. | Corrosion protection of metal andalloy parts: galvanising specificationand/or stainless steel grade |
To SABS 763, 316 | |
| Tests | |||
| 16. | Previoustype testresults/certificate tobe provided with bid |
Yes/No | Yes |
| 17. | Routine test results/certificate to be provided on delivery |
Yes/No | Yes |
| 18. | Drawing showing dimensions of thearrestor to be providedwith the bid |
Yes/No | Yes |
| 19. | Minimum one minutewet powerfrequency withstand voltage ofexternalinsulation of surgearrester housing |
kV | 28 |
| 20. | Maximum steepcurrentimpulse residual voltage for a 10kA, 1/20µs, dischargecurrent |
kV | 50 |
| 21. | Maximumlightningimpulseresidual voltage for a 10 kA, 8/20µs, dischargecurrent |
kV | 40 |
| 22. | Lightning, 1,2/50µs, impulsewithstand level ofexternalinsulation of surgearrester housing |
kV | 95 |
| 23. | Line dischargeclassrating | 1 | |
| 24. | Long durationcurrent, 2 000µs, impulse withstand |
A | 250 A |
| 25. | Highcurrent, 4/10µs, impulsewithstand | kA | 100 kA |
| 26. | Automaticearth lead disconnector to betested in accordance withIEC 60099-4 |
Yes/No | Yes |
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