FIELD: electrical engineering; in-service drying of winding insulation. SUBSTANCE: method involves repeated drying cycles including circulation of transformer oil contacting solid insulation of transformer windings followed by moisture removal. Each cycle includes build-up of electric field in solid insulation prior to oil circulation which is maintained for 2-4 h and moisture removal from transformer oil by centrifuging or freezing. Electric field is built up by applying dc voltage between winding conductors and transformer ground. EFFECT: enhanced drying effectiveness; provision for dispensing with evacuating equipment. 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR DRYING SOLID INSULATION OF TRANSFORMER WINDINGS IN SEALED TANK | 2003 |
|
RU2250525C1 |
| METHOD OF DETECTING DEFECTS IN TIGHTNESS OF ELECTRIC INSULATION | 2003 |
|
RU2250473C1 |
| ELECTROOSMOTIC DRYING METHOD FOR ELECTRICAL MACHINE INSULATION | 2000 |
|
RU2174280C1 |
| METHOD FOR IMPREGNATING WINDING INSULATION OF ELECTRICAL PIECES OF EQUIPMENT | 2000 |
|
RU2174279C1 |
| METHOD FOR ELECTROOSMOTIC DRYING OF CABLE PAPER INSULATION | 2003 |
|
RU2254631C1 |
| METHOD FOR ELECTROOSMOTIC DRYING OF ELECTRICAL MACHINE WINDING INSULATION | 2003 |
|
RU2250550C1 |
| METHOD OF DRYING SOLID INSULATION OF ELECTRIC MACHINES AND APPARATUS IN SEALED TANK | 0 |
|
SU1365265A1 |
| ELECTROOSMOTIC DRYING METHOD FOR ELECTRICAL MACHINE INSULATING SYSTEM | 0 |
|
SU1760606A1 |
| PROCESS OF ELECTRIC OSMOTIC DRYING OF INSULATION OF WINDINGS OF ELECTRICAL MACHINES | 1999 |
|
RU2138900C1 |
| METHOD FOR DRYING SOLID INSULATION OF TRANSFORMER WINDINGS IN INSULATED VESSEL BY COOLING DEVICE | 2011 |
|
RU2569927C2 |
