Insulator Ladder
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METAL OXIDE SURGE ARRESTER
Features
Performance Data
Porcelain housed for outdoor application
CONSTRUCTION & OPERATING PRINCIPLE
11kV
No. | DETAIL | UNITS | DATA |
Type | 11kV gapless type metal oxide surge arrester – Distribution class |
||
1. | Nominal system voltage | kV | 11 |
2. | Highest system voltage | kV | 12 |
3. | Basic Insulation Level (BIL) | kV | 95 |
3. Ratings and type of surge arrester |
|||
4. | Specification to which surge arrester complies | IEC 60099–4 |
|
5. | Rated voltage of surge arrester | kV | 10 |
6. | Nominal, 8/20 µs, discharge current rating of surge arrester |
kA | 10 |
7. | Maximum continuous operating voltage of surge arrester |
kV | 7.3 |
8. | Gapless or gapped type metal–oxide surge arrester |
Gapless | |
9. | Material of insulation | High temperature vulcanised silicon rubber |
|
10. | Rated frequency of surge arrester | Hz | 50 |
11. | Design altitude of surge arrester (above sea level) |
m | 1 400m |
12. | Design ambient temperature of surge arrester | oC | –1 to40 |
13. | Specific creepage distance of surge arrester | .mm/kV | 25 |
Automatic earth lead disconnectors requirements |
|||
14. | Automatic earth lead disconnectors to be fitted | Yes/No | YES |
15. | Corrosion protection of metal and alloy parts: galvanising specification and/or stainless steel grade |
To SABS 763, 316 | |
Tests | |||
16. | Previous type test results/certificate to be provided with bid |
Yes/No | Yes |
17. | Routine test results/certificate to be provided on delivery |
Yes/No | Yes |
18. | Drawing showing dimensions of the arrestor to be provided with the bid |
Yes/No | Yes |
19. | Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing |
kV | 28 |
20. | Maximum steep current impulse residual voltage for a 10 kA, 1/20 µs, discharge current |
kV | 50 |
21. | Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current |
kV | 40 |
22. | Lightning, 1,2/50 µs, impulse withstand level of external insulation of surge arrester housing |
kV | 95 |
23. | Line discharge class rating | 1 | |
24. | Long duration current, 2 000 µs, impulse withstand |
A | 250 A |
25. | High current, 4/10 µs, impulse withstand | kA | 100 kA |
26. | Automatic earth lead disconnector to be tested in accordance with IEC 60099–4 |
Yes/No | Yes |
33kV
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 | ||
specification and/or stainless steel grade | |||
Tests | |||
19. | Previous Type Test reports/certificate from recognized authority to be provided with bid |
Yes/No | Yes |
20. | Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing |
kV | 70 |
21. | Maximum steep current impulse residual voltage for a 10 kA, 1/20 µs, discharge current |
kV | 99.7 |
22. | Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current |
kV | 91.8 |
23. | Lightning, 1,2/50 µs, impulse withstand level of external insulation of surge arrester housing |
kV | 170 |
24. | Line discharge class rating | Class | 1 |
25. | Long duration current, 2 000 µs, impulse withstand | A | 250 A |
26. | High current, 4/10 µs, impulse withstand | kA | 100 kA |
27. | Is the automatic earth lead disconnector tested in accordance with IEC 60099–4? |
Yes/No | Yes |
66kV
S/N | TECHNICAL DETAILS | UNITS | DATA |
1. | Description | Station type lightning arrestor complete with steel support structures. |
|
2. | Type | Zinc oxide gapless lightning arrestor |
|
System parameters | |||
3. | Nominal system voltage | kV | 66 |
4. | Highest system voltage | kV | 72.5 |
5. | Power frequency | Hz | 50 |
6. | Type of system earthing | Effective/Non effective | |
7. | Type of arrestor connection to system | Line to ground | |
3. Ratings and type of surge arrester |
|||
8. | Rated voltage of surge arrester | kV rms | 54 |
9. | Nominal, 8/20 µs, discharge current rating of surge arrester | kA peak | 10 |
10. | Maximum continuous operating voltage of surge arrester | kV | 43 |
11. | Minimum one minute wet power frequency withstand voltage | kVrms | 140 |
151
of external insulation of surge arrester housing | |||
12. | Maximum steep current impulse residual voltage for a 2 kA, 30/60 µs, discharge current |
kVpeak | 104 |
13. | Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current |
kVpeak | 127 |
14. | Minimum lightning, 1,2/50 µs, impulse withstand level of external insulation of surge arrester housing |
325 | |
15. | Line discharge class rating | 2 | |
16. | Lighting arrestor counter, leakage current meter and their accessories to be provided |
Yes/No | Yes |
17. | Gapless or gapped type metal–oxide surge arrester | Gapless | |
18. | Insulation Material | Porcelain | |
19. | Cantilever strength of surge arrester | Nm | 3000 |
20. | Rated frequency of surge arrester | Hz | 50 |
21. | Maximum angle from vertical at which surge arrester is fully functional |
Deg | 45 |
22. | Design altitude of surge arrester (above sea level) | m | 1400 m |
23. | Design ambient temperature of surge arrester | oC | –1 to 40 |
24. | Humidity | % | 85 |
25. | Specific phase–to–ground creepage of surge arrester | .mm/kV | 25 |
26. | Corrosion protection of metal and alloy parts: galvanising specification and/or stainless steel grade |
to SABS 763 or 316 stainless steel |
|
27. | Previous type test results/certificate to be provided with bid | Yes/No | Yes |
28. | Design drawings showing dimensions including foundations and brochures to be provided with bid |
Yes/No | Yes |
29. | Quality Assurance certification to be provided with the bid | Yes/No | Yes |
30. | Routine test results/certificate to be provided on delivery | Yes/No | Yes |
31. | Galvanized steel support structures complete with bolts & washers to be provided on delivery |
Yes/No | Yes |
32. | Applicable standard | IEC60099 |
152
88Kv
S/N | TECHNICAL DETAILS | UNITS | DATA |
33. | Description | Station type lightning arrestor complete with steel support structures. |
|
34. | Type | Zinc oxide gapless lightning arrestor |
|
System parameters | |||
35. | Nominal system voltage | kV | 88 |
36. | Highest system voltage | kV | 100 |
37. | Power frequency | Hz | 50 |
38. | Type of system earthing | Effective/Non effective | |
39. | Type of arrestor connection to system | Line to ground | |
3. Ratings and type of surge arrester |
|||
40. | Rated voltage of surge arrester | kV rms | 84 |
41. | Nominal, 8/20 µs, discharge current rating of surge arrester | kA peak | 10 |
42. | Maximum continuous operating voltage of surge arrester | kV | 67 |
43. | Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing |
kVrms | 185 |
Maximum steep current impulse residual voltage for a 2 kA, | kVpeak | 188 | |
30/60 µs, discharge current | |||
45. | Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current |
kVpeak | 218 |
46. | Minimum lightning, 1,2/50 µs, impulse withstand level of external insulation of surge arrester housing |
450 | |
47. | Line discharge class rating | 2 | |
48. | Lighting arrestor counter, leakage current meter and their accessories to be provided |
Yes/No | Yes |
49. | Gapless or gapped type metal–oxide surge arrester | Gapless | |
50. | Insulation Material | Porcelain | |
51. | Cantilever strength of surge arrester | Nm | 3000 |
52. | Rated frequency of surge arrester | Hz | 50 |
53. | Maximum angle from vertical at which surge arrester is fully functional |
Deg | 45 |
54. | Design altitude of surge arrester (above sea level) | m | 1400 m |
55. | Design ambient temperature of surge arrester | oC | –1 to 40 |
56. | Humidity | % | 85 |
57. | Specific phase–to–ground creepage of surge arrester | .mm/kV | 25 |
58. | Corrosion protection of metal and alloy parts: galvanising specification and/or stainless steel grade |
to SABS 763 or 316 stainless steel |
|
59. | Previous type test results/certificate to be provided with bid | Yes/No | Yes |
60. | Design drawings showing dimensions including foundations and brochures to be provided with bid |
Yes/No | Yes |
61. | Quality Assurance certification to be provided with the bid | Yes/No | Yes |
62. | Routine test results/certificate to be provided on delivery | Yes/No | Yes |
63. | Galvanized steel support structures complete with bolts & washers to be provided on delivery |
Yes/No | Yes |
64. | Applicable standard | IEC60099 |
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