72.5kV Dry R.I.F./R.I.P. Transformer Bushing(Draw Lead Type)
- Dimension-table 1
- Dimension-table 2
- Electrical data
| Dimension -table 1 |
| FBRG
72.5/630-800 | FBRGL
72.5/630-800 | FBRG
72.5/1250 | FBRGL
72.5/1250 |
| Total length | L | 1545 | 1905 | 1565 | 1925 |
| Terminal blocks | Hole number and
hole diameter | n1×d1 | 4x14 | 4x14 | 4x18 | 4x18 |
| Hole distance | a1 | 40 | 40 | 50 | 50 |
| Panel surface | b1×b2 | 80×80 | 80×80 | 100×100 | 100×100 |
| Panel thickness | δ | 12 | 12 | 14 | 14 |
| Cable entry length | L4 | 1320 | 1680 | 1320 | 1680 |
| Head diameter | d3 | 142 | 142 | 142 | 142 |
| lead wire connection aperture | d8 | 28 | 28 | 32 | 32 |
| Compound external insulation | Insulation diameter | L1 | 840 | 840 | 840 | 840 |
| Creepage distance | S/U | ≥31 | ≥31 | ≥31 | ≥31 |
Maximum umbrella
diameter | d9 | 220 | 220 | 220 | 220 |
| Flange | Outer diameter of
flange plate | d7 | 320 | 320 | 320 | 320 |
Center distance of
installing hole | a2 | 280 | 280 | 280 | 280 |
Hole number and
hole diameter | m×d2 | 6×18 | 6×18 | 6×18 | 6×18 |
| IInner diameter of sealing surface | ＞d4 | 160 | 160 | 160 | 160 |
| Total length of oil impregnated partimpregnated part | L2 | 325 | 685 | 325 | 685 |
| Core diameter in oil | d | 120 | 120 | 120 | 120 |
| Oil earthed length | L3 | 0 | 400 | 0 | 400 |
| Equalizing ball | L5 | 60 | 60 | 60 | 60 |
| d5 | 120 | 120 | 120 | 120 |
| Inner diameter of contact tube | d6 | 39 | 39 | 39 | 39 |
| Casing weight | kg | 45 | 56 | 46 | 57 |
Note:The outline dimension of the product in the table is recommended,all size can be designed according to the needs of users. Only one kind of CT length is listed on the table, and the user can design the CT length according to the product requirements.With the changes of CT length, relevant dimensions also change.
| Technical standards | GB/T 4109-2008 IEC 60137 Ed.6.0 |
| Rated voltage | 72.5kV |
| Rated current | 630-3150A |
| 1min power frequency dry(wet) voltage withstand | 155(140)kV |
| Full-wave impulse withstand voltage of lighting | 325kV |
| Under 1.05 times of maximum phase voltage tan δ | ≤0.004 |
| Partial discharge under the rated voltage | ≤10pC |
| Bending resistant test load | 2500N |
| The minimum nominal creepage distance | 31mm/kV |
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Transformer Bushing