Download Transformer

Transformer
Standards
• IEC 60076
Power transformers
Transformer Main Parts
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Three-limb core
LV Winding
HV Winding
Tapped Winding
Tap Leads
LV Bushings
HV Bushings
Clamping Frame
On-Load Tap Changer
Motor Drive
Tank
Conservator
Radiators
Active Part
Active Part
Windings and Cores
Conductors
Papers
Pressboards
Oil
Bushing
Tank
Conservator
Breather
Buchholz Relay
Non Return (Shutter) Valve
Pressure relief devices
Thermometers
Oil Level Indicator
On Load Tap Changer
On Load Tap Changer
Motor Drive
Cooling System
Technical Specifications
1. 3-phase unit/bank of single phase units
2. Separate winding/auto transformer
3. Rated voltage (HV/LV/TV)
4. Rated frequency
5. Cooling system
6. Vector group
7. Rated power
9. Rated current (HV/LV/TV)
10. Insulation level (HV/LV/TV/Neutral)
a) LIWL (winding /bushing)
b) SIWL (winding /bushing)
c) PFWL (winding /bushing)
11. Creepage distance
Technical Specifications
12. Continuous power rating at principal tap:
12.1. at first stage of cooling
a) HV Winding
b)LV Winding
c)TV Winding
12.2. at second stage of cooling
a) HV Winding
b)LV Winding
c)TV Winding
12.3. at third stage of cooling
a) HV Winding
b)LV Winding
c)TV Winding
Technical Specifications
13. Maximum temperature rise
a) Oil
b) Winding
c) Hottest spot
14. Insulation level (HV/LV/TV/Neutral)
a) LIWL (winding /bushing)
b) SIWL (winding /bushing)
c) PFWL (winding /bushing)
15. Positive sequence impedance at 75oC on principle
tapping (max./min. tap voltage) and:
a) between HV & LV winding
b) between HV & TV winding (if applicable)
c) between TV & LV winding (if applicable)
Technical Specifications
16. Rated short circuit strength on windings (HV/LV/TV)
17. Short circuit duration
18. No load losses
19. Load losses
20. Type of winding
21. Type of insulation of windings (uniform/graded)
a)HV
b)LV
c)TV
22. Max. sound level (dB)
Technical Specifications
23. Tap changer
a) Type (oil/vacuum)
b) rated current
c) rated voltage
d) total range
e) total number of steps
f) variation per step
g) position of tapping
h) insulation level
Power Transformer Outline Drawing
Distribution Transformer
Distribution Transformer
(Conservator Type)
Distribution Transformer
(Hermetically Sealed)
Dry Type Transformer
Shunt Reactors