VT Dry Type Instrument Transformer
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- In detail
Technical Data : | VEG-12 | VEG-24 | |
Insulation level (IEC) | kV | 12/28/75 | 24/50/125 |
Rated Primary Voltage*¹ | V | Up to 11.000/√3 | Up to 22.000/√3 |
Primary Terminal Marking | A-N | ||
Max. number of sec. Windings | 1 or 2 + 1 Measuring or/and protection Tertiary winding |
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Rated Secondary voltages | V | 100/√3 or 100/√3 | 100/√3 or 100/√3 |
Secondary Terminal Marking*² | a-n or a-b | da-dn | |
Thermal Limit Current | A | 6 | 4 |
Accuracy / protection class | 0.2 0.5 1 3 3p 6p | ||
Max. Rated burden | VA | 30 75 150 200*³ 200*³ 200*³ |
*¹ - Upon request, VEG-24 transformers can be secondary re-connectable to lower rated primary voltages, but in such cases, at lower ratio standard characteristic (accuracy/rated output) can be:
Accuracy class | 0.2 | 0.5 | 1 | 3 |
Max. Rated burden (VA) | - | 30 | 75 | 120 |
*² - Sec. terminals Marking of VEG transformers depends upon ordered combination of secondary windings.
*³ - Standard transformers are designed for total burden (on all secondary windings) up to 200 VA
Application
- VEG transformers serve as apparatus for transforming high values of primary voltages to secondary voltages suitable for feeding the measuring and protection devices, which are proscribed by standard.
- VEG transformers can be operated in indoor conditions in medium voltage networks up to 24 kV
- It is advisable to protect the transformers from direct sunlight and an excess of dust.