Three Phase Power Transformers for the Internal Services of the Nuclear Power Plant
Miscellaneous
The transformers contained in this group comply to the conditions imposed by STAS 1703/80 and IEC 76 standards, being intended to supply the own services of the nuclear power plant.
Conditions of operation
The transformers are intended to function in the N climatic area in accordance with the environment conditions required in the customer's specification, whose features and ambient temperature are:
Construction features
The transformers are achieved in proper condition so as to assure the quality required by AQ-04 norms.
The magnetic core is made of cold rolled silicous steel sheet.
The HV windings are of continuous type, the tapped ones are of continuous type, and the LV ones of helical type.
The on load tap changers M III 500 /72.5 kV type and 3M I-1500/24 kV type and are provided with possibilities of connection to the automatic voltage control device.
The tank and the platform (or the cover) are provided with all the mechanic accessories to install, carry and check the transformer good operation.
Main accessories
magnetic oil level indicator
Buchholz relay
oil and winding temperature indicator
current transformers
motofans
pressure relief device
HV, LV, MV bushings
radiators
oil conservator
control cabinet
oil draining and filtering valves
undercarriage (wheels)
OLTC
motor drive unit for OLTC
de-hydrating breather with silicage
Technical specific features
The main equipment sorts of the group are presented in the following table:
Rating
(MVA) | Voltage
(kV) |
Uk
(%) | Po
(kW) |
Pk
(kW) | Connection group |
Overall Weight
(kg) | Overall Dimensions
(LxWxH)(mm) |
|---|
| 60/30/30 | 24/10.5/6.3 |
18.5 | 46 |
236 | Dyn1yn1 |
110500 | 7670x5440x5575 |
| 60/30/30 | 110/10.5/6.3 |
20.2 | 46 |
236 | YNyn0d1 |
117000 | 8425x5090x5755 |
| 1. | HV bushings |
| 2. | HV neutral bushing |
| 3. | LV bushings |
| 4. | LV neutral bushing |
| 5. | MV bushings |
| 6. | Oil conservator |
| 7. | On load tap changer |
| 8. | Motor drive for OLTC |
| 9. | Pressure relief device |
| 10. | Oil filtering valve |
| 11. | Radiator |
|
| 12. | Fan |
| 13. | Jacking supports |
| 14. | Oil draining and filtering valve |
| 15. | Buchholz relay |
| 16. | Magnetic oil level indicator |
| 17. | Control cabinet |
| 18. | Winding temperature indicator |
| 19. | Oil temperature indicator |
| 20. | Dehydrating breather |
| 21. | Wheels |
|
