Inductive Combined Transformer EJGF high-voltage,
Type EJGF combined transformers are used in high-voltage substations,
within the 245-550 kV range.
They transfer high voltage and high current into standardised,
equivalent values for meters, measuring and protection devices.
Features
- Reduced transport costs with one unit instead of two
- Less space needed with just one footprint
- Lower material costs due to a reduced number of supports and fewer primary connections
- Lower installation effort as only one unit has to be installed instead of two
Technical data
Type EJGF |
245 |
300 |
330 |
362 |
420 |
550 |
|
| Standard | IEC / IEEE | ||||||
| Highest voltage for equipment | kV | 245 | 300 | 300 | 363 | 420 | 550 |
| Rated power-frequency withstand voltage | kV | 460 | 460 | 460 | 575 | 630 | 680 |
| Rated lightning impulse withstand voltage | kV | 1050 | 1050 | 1175 | 1175 | 1425 | 1550 |
| Frequency | Hz | 50 / 60 | |||||
| Primary rated current | A | ≤ 5000 | |||||
| Secondary rated current | A | 1 / 5 | |||||
| Rated short-time thermal current [Ith] | kA / 3s | ≤ 80 | |||||
| Rated dynamic current [Idyn] | kA | ≤ 200 | |||||
| Accuracy class CT part | 0.1-3; P; PR; PX; TPS; TPX; TPY; TPZ | ||||||
| Accuracy class VT part | 0.1-3; 3P; 6P | ||||||
| Rated thermal limiting output VT part | VA | ≤ 3000 | |||||
| Max. simultaneous burden (cl. 0.2) | VA | 300 | |||||
| Max. number of CT cores | 8 | ||||||
| Max. number of VT windings | 5 | ||||||
| Nominal operating / transport overpressure (20°C) | 4 / 0.5 | ||||||
Type EJGF |
245 |
300 |
330 |
362 |
420 |
550 |
||
| Height of unit* | A | mm | 4980 | 4980 | 6140 | 6140 | 6500 | 7440 |
| Height to primary terminal* | B | mm | 3375 | 3375 | 4730 | 4730 | 5090 | 5890 |
| Depth of unit including terminal box | C | mm | 845 | 845 | 1088 | 1088 | 1088 | 1088 |
| Depth of unit base | D | mm | 749 | 749 | 1088 | 1088 | 1088 | 1088 |
| Width of unit base | E | mm | 736 | 736 | 1075 | 1075 | 1075 | 1075 |
| Distance between screw holes at base | F | mm | 600 | 600 | 900 | 900 | 900 | 900 |
| Min. creepage distance* | mm | 6700 | 7500 | 8250 | 9050 | 10500 | 13750 | |
| Gross weight approx.* | kg | 940 | 940 | 1000 | 1000 | 1600 | 1700 | |
| Gas weight, approx. * | kg | 45 | 45 | 58 | 58 | 60 | 63 |
