Voltage Transformer WD
Resin casted medium voltage indoor CT’s and VT’s are typically used to fit in standard MV cabinets. Special requirements as high burden for VT’s or capacitive tap for CT’s can be offered.
The 2-phase insulation voltage transformer in dry block construction is designed for the mounting in air-insulated MV cells. The magnetic properties of the iron core are ensured by specific padding and potting in epoxy resin. With this construction the class accuracy remains constant over decades . Compliance with the partial discharge limits according to IEC 61869-1 guarantees safe operation. The mounting position is freely selectable. The voltage transformers are designed according to the common national and international standards. Specific requirements defined by the customer are possible on request.
Features
- Double-phase
- Free choice of mounting position
- Up to 3 secondary windings
- Up to 1’500 VA thermal limiting power
Specifications and Downloads
Technical Specifications
Dimensions
Technical data
Type WD | 12-M1 | 24-M1 | 36-O1 | |
| Standard | IEC / EN 61869-1, IEC / EN 61869-3, IEEE C57.13, CAN / CSA 61869 | |||
| Highest voltage for equipment | kV | 12 | 24 | 36 |
| Rated power frequency withstand voltage | kV | 28 | 50 | 70 |
| Rated lightning impulse withstand voltage | kV | 75 | 125 | 170 |
| Frequency | Hz | 50 / 60 | ||
| Accuracy classes | 0.1 - 3; 3P; 6P | |||
| Rated short-time thermal current | VA | 600 | 750 | 750 |
| Rated burden (cl. 0.2) | VA | 40 | 40 | 75 |
| Rated burden (cl. 0.5) | VA | 125 | 125 | 200 |
| Insulation class | E | |||
| Max. number of windings | 1 | 1 | 3 | |
Type WD | 12-M1 | 24-M1 | 36-O1 | |
| L1 Length of voltage transformer | mm | 300 | 300 | 375 |
| L2 Length of voltage transformer incl. base plate | mm | 315 | 315 | 380 |
| L3 / L4 Length of hole spacing base plate | mm | 220 / 290 | 220 / 290 | 290 / 350 |
| H1 Height of voltage transformer incl. base plate | mm | 275 | 275 | 415 |
| B1 Width of voltage transformer | mm | 185 | 185 | 222 |
| B2 Width of base plate | mm | 185 | 185 | 225 |
| B3 / B4 Width of hole spacing base plate | mm | 120 / 150 | 120 / 150 | 150 / 200 |
| D Diameter mounting hole | mm | 11 | 11 | 11 |
| Approx. weight | kg | 28 | 28 | 45 |
