31.5mva 66kv Double Winding Power Transformers with on Load Tap Changer 69 kV Three phase two windings with OCTC
Technical parameters:
| Rated Capacity(MVA): |
31.5 |
| Voltage ratio HV(KV): |
69 |
| Voltage ratio LV(KV): |
6.3 |
| Voltage ratio HV Tapping Range(kv): |
± 8 x 1.25% |
| Connection symbol: |
YND11 |
| No-load Loss(KW): |
33.7 |
| No-load Current(%): |
0.45 |
| Full-load Loss(KW): |
126.9 |
| Impedance(%): |
9 |
| Reference Temperature |
° C |
75 |
| No-Load Losses at Principal Tapping: |
W |
9.0 kW |
| Looses of Cooling Fan System |
W |
/ |
| Insulation Levels (LI/AC): |
LI325AC140/LI125AC55 |
| No Load Current: |
@ Un |
% In |
0.56 |
| @ 1.05 Un |
% In |
0.68 |
| Sound Level: |
dB |
< 67 |
| Short Circuit Impedance at Principal Tapping: |
P/S |
% Un |
8~10% |
| P/T |
% Un |
|
| S/T |
% Un |
|
| Reference Temperature |
° C |
75 |
| Top Oil Temperature Rise: |
°C |
51K |
| Average Winding Temperature Rise: |
°C |
64K |
| Insulation Resistance (Reference Temperature = 20°C): |
| HV/LV / |
Mohms |
≥1000 |
| HV/GR - LV/GR - |
Mohms |
≥1000 |
11 ~330 kV power system of power plant, substation, mining enterprise and etc.
Transformer Description Specifications
35 kV Three-phase two windings power transformer with OLTC
35 kV Three-phase two windings power transformer with OCTC
66 kV Three-phase two windings power transformer with OLTC
66 kV Three-phase two windings power transformer with OCTC
110 kV Three-phase two windings power transformer with OCTC
110 kV Three-phase two windings power transformer with OLTC
110 kV Three-phase Three windings power transformer with OCTC
220 kV Three-phase two windings power transformer with OCTC
220 kV Three-phase two windings power transformer with OLTC
220 kV Three-phase Three windings power transformer with OLTC
330 kV Three-phase two windings power transformer with OCTC
330 kV Three-phase two windings power transformer with OLTC
330 kV Three-phase Three windings power transformer with OLTC
66KV/35KV/10KV Earthing transformer
20KV S11-M Series distribution transformer
10KV Three-phase full sealed distribution transformer with OCTC
10KV Three-phase full sealed distribution transformer with OLTC
10KV S11- MR Full sealed spiral core transformer
10KV D11 Type single- phase oil-immersed transformer
20kv SH15-M Series amorphous alloy distribution transformer
10kv SH15-M Series amorphous alloy distribution transformer
ZGS Pad-mound transformer substation
YB series Pad-mound transformer substation
Parameter base on IEC standard, more details Kindly contact with us
Product Features
1. Long life cycle
2. Hign insulation level
3. Oil leak proof design
4. Excellent control for cooling
5. Reasonabkle accessories selection
6. Strong short circuit withstand ability
7. Low loss, Low noise, Free maintenance
Advanced Design
1. Adopting the art standard three dimesion design software to produce correct and complete engineering documentation.
2. Adopting the craft of high frequency -welding and winding-Hydraulic compaction to improve short circuit ability.
3. Adopting the craft of core Hydraulic compaction to improve the strength of core for reducing the noise level.
4. Designing the transformer base on the worst short circuit conditions for avoiding short circuit issue.
5. Adopting Electric Stress field calculation program to guarentee insulation level.
6. Adopting high quality rubber gaskets in groove for leak.
Quality Assurance
1. Adopting the Quality Control Verification Card to control quality in the whole manufacturing operations.
2. Strictly selecting the transformer raw material and the suppliers of accessories in domestic and abroad.
3. All transformers get authentication of ISO9001, ISO14001, OHSAS18001 AND CE.
4. Comprehensive Training for workes and staffs to improve service quality.
Typical projects
1.156MVA 230KV POWER TRANSFORMER FOR ECUADOR STATE POWER GRID
2.63MVA 154KV POWER TRANSFORMER FOR TURKEY
3.50MVA 69KV POWER TRANSFORMER DURING KEMA TESTING
4.30MVA 66KV POWER TRANSFORMER FOR PARAGUAY
5.1.5MVA-23KV POWER TRANSFORMER FOR CHILE SOLAR PLANT
6. 220kV power transformer Substation in United States.
7. Auto-transformer150MVA/138KV Power Substation in Ecuador
8. Power traformer 50000kVA 60kV installing in Peru
Packaging & Shipping
Our Services
1. Pre sale service
A. Make technical solution
B. Send quotation, technical data sheet and drawing
C. Make manufacturing plan, testing plan, and shipping plan
2. In sale service
A. Supervise the manufacturing schedule totally in accordance with the plan
B, send photos to customer during every manufacturing process(hold point)
C. Inform the customer one week before testinng.
D. Book hotel and ticket for customer if they will come do FAT.
3. After sale service
A. Installation and commissioning
B. Training the workers
B. Quick response within 12 hours any time
D, provide 12 months gurantee period normally.
Reference project:
Plant:
Audited Supplier 
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