Inductive Voltage Transformer EOF high voltage,
Oil-paper insulated inductive voltage transformers type EOF,
are used in high voltage networks within the 24-245 kV range.
They transform high voltage into standardised values for meters,
measuring and protection devices.
Features
- Protection of the secondary winding from transient overvoltages in the high-voltage network through capacitively coupled shielding
- Protection against occurring ferroresonance through low operating inductance in the iron core
- High operating safety as there are no active parts in the insulator
- Minimum oil volume through optimised design
Technical data
Type EOF |
24 |
36 |
72 |
123 |
145 |
170 |
245 |
|
| Standard | IEC / IEEE | |||||||
| Highest voltage for equipment | kV | 24 | 36 | 72.5 | 123 | 145 | 170 | 245 |
| Rated power-frequency withstand voltage | kV | 50 | 70 | 140 | 230 | 275 | 325 | 460 |
| Rated lightning impulse withstand voltage | kV | 125 | 170 | 325 | 550 | 650 | 750 | 1050 |
| Frequency | Hz | 16.7 / 50 / 60 | ||||||
| Accuracy class | 0.1-3; 3P; 6P | |||||||
| Rated thermal limiting output VT part | VA | ≤ 1500 | ≤ 3000 | |||||
| Max. simultaneous burden (cl. 0.2) | VA | 200 | 300 | |||||
| Max. number windings | 5 | |||||||
Type EOF |
24 |
36 |
72 |
123 |
145 |
170 |
245 |
||
| Height of unit* | A | mm | 1107 | 1107 | 1430 | 2116 | 2392 | 2581 | 3507 |
| Height to primary terminal* | B | mm | 1027 | 1027 | 1350 | 1976 | 2252 | 2441 | 3206 |
| Depth of unit including terminal box | C | mm | 526 | 526 | 526 | 710 | 710 | 730 | 938 |
| Depth of unit base | D | mm | 360 | 360 | 360 | 500 | 500 | 500 | 660 |
| Width of unit base | E | mm | 360 | 360 | 360 | 520 | 520 | 520 | 660 |
| Distance between screw holes at base | F | mm | 310 | 310 | 310 | 450 | 450 | 450 | 600 |
| Min. creepage distance* | mm | 950 | 950 | 1860 | 3080 | 3900 | 4394 | 6160 | |
| Approximate weight* | kg | 115 | 115 | 125 | 305 | 330 | 335 | 350 |
