| Oil-immersed Type Transformer |
| No. |
Name |
Unit |
Guaranteed Value |
| |
|
|
|
| 1 |
Company name |
|
Markevina Technology (Zhongshan) Co., Ltd |
| 2 |
Country of origin |
|
China |
| 3 |
Standard |
|
IEC60076 |
| 4 |
Type |
|
Oil-immersed type transformer |
| 5 |
Installation |
|
Outdoor |
| 6 |
Altitude |
m |
≤1500 |
| 7 |
Ambient temperature |
ºC |
-25~+40 |
| 8 |
Transformer model |
|
SFZ-94500/110 |
| 9 |
Rated |
- Capacity
|
kVA |
56000/94500 |
- Primary Voltage
|
kV |
110 |
- Secondary Voltage
|
kV |
23 |
- Tertiary Voltage
|
kV |
6.3 |
| Tapping range(NLTC) |
|
±8x2% @ 110kV side |
| 10 |
Rated frequency |
Hz |
50 |
| 11 |
Number of phase |
|
3 |
| 12 |
Number of winding |
|
3 |
| 13 |
Transformer oil model |
|
Mineral oil (Diala DX) |
| 14 |
Cooling method |
|
ONAN/ONAF |
| 15 |
Vector group |
|
YNyn0+d |
| 16 |
Short circuit impedance |
% |
13.5%(±7.5%) |
| 17 |
No-load loss |
kW |
56 |
| Load loss |
kW |
360(ONAF) |
| 18 |
Temperature rise |
Top oil |
K |
50 |
| Winding |
K |
55 |
| 19 |
Insulation level |
Primary |
- Power frequency withstand voltage
|
kV |
230 |
- Lightning impulse (full wave)
|
kV |
550 |
| Secondary |
| a) Power frequency withstand voltage |
kV |
50 |
| b)Lightning impulse (full wave) |
kV |
150 |
| Tertiary |
| a) Power frequency withstand voltage |
kV |
28 |
| b)Lightning impulse (full wave) |
kV |
75 |
| Neutral |
| a) Power frequency withstand voltage |
kV |
140 |
| b)Lightning impulse (full wave) |
kV |
325 |
| 20 |
Winding Material (HV / LV/TV) |
|
Copper / Copper |
| 21 |
Core material |
|
Grain oriented silicon steel |
| 22 |
Location of HV Bushings |
|
Top |
| 23 |
Location of LV Bushings |
|
Top |
| 24 |
Location of TV Bushings |
|
Top |
| 25 |
HV Bushing |
|
126/630 |
| 26 |
LV Bushing |
|
24/3150 |
| 27 |
TV Bushing |
|
12/3150 |
| 28 |
Neutral bushing |
|
72.5/630 |
| 29 |
Tap changer |
Specification |
|
CMIII-600Y |
| Rated current |
A |
600 |
| Country of origin |
|
Huaming /china |
| Dimensions (For reference) |
| 30 |
Overall dimensions |
Length |
mm |
7000/6900 |
| Width |
mm |
5200/2800 |
| Height |
mm |
5800/3800 |
| 31 |
Weight |
Active part |
kg |
About59100 |
| Oil |
kg |
About23000 |
| Total |
kg |
about 97500 |
| Tests |
| 32 |
Measurement of Winding Resistance |
Yes/No |
Yes |
| 33 |
Measurement of Voltage Ratio and Vector |
Yes/No |
Yes |
| 34 |
Measurement of Impedance and Load |
Yes/No |
Yes |
| 35 |
Measurement of No-load Losses and |
Yes/No |
Yes |
| 36 |
Measurement of d.c. insulation resistance between each winding to earth and between windings. |
Yes/No |
Yes |
| 37 |
Insulation routine test |
Yes/No |
Yes |
| 38 |
Tests on on-load tap-changers, where appropriate |
Yes/No |
Yes |
| 39 |
Leak testing with pressure for liquid-immersed transformers (tightness test) |
Yes/No |
Yes |
| 40 |
Check of the ratio and polarity of built-in current transformers. |
Yes/No |
Yes |
| 41 |
Check of core and frame insulation for liquid immersed transformers with core or frameinsulation |
Yes/No |
Yes |
| 42 |
insulation oil test |
Yes/No |
Yes |
| 43 |
Power Frequency Voltage Withstand Test |
Yes/No |
Yes |
| 44 |
Induced voltage withstand test with partial discharge measurement |
Yes/No |
Yes |
| 45 |
HV line end operation impact test |
Yes/No |
Yes |
| 46 |
Ightning impulse test |
Yes/No |
Yes |
| |
Additional routine tests for transformers with Um > 72,5 kV |
| 47 |
Determination of capacitances windings-to-earth and between windings |
Yes/No |
Yes |
| 48 |
Measurement of dissipation factor (tan ) of the insulation system capacitances |
Yes/No |
Yes |
| 49 |
Measurement of dissolved gasses in dielectric liquid from each separate oil compartment except diverter switch compartment. |
Yes/No |
Yes |
| 50 |
Measurement of no-load loss and current at 90 % and 110 % of rated voltage |
Yes/No |
Yes |
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