Product Description
20kv electric oil cooled/immersed Power transformer
Introduction
The performance of our S9 S10 S11 series 20kV and 35kV three-phase oil-immersed transformer conform to the standard of GB 1094-1996 "Power Transformer " and GB/T6451-2008 "Technical Parameter and requirements of Three-phase Oil-immersed Power Transformer". The iron core is made of quality cold -rolled silicon steel sheet , and the coil is made of quality oxygen-free copper, featuring good outlook and safe running . The products are widely used in power transmission and distribution of industrial and agricultural power networks.
Main function and features
High reliability, advanced level of performances, reasonable economical indicators.
The core joints are of stepped shape with this steps , and the surface of the core is coated with cured paint to lower losses and noises.
The winding has novel structure and its oil passage is reasonable designed composition. Its newly designed insulation structure helps enhance its mechanical strength and this short-circuit withstanding ability .
The oil tank is in various types , all have good outlook .
Main Technical parameters for 20kv level,S11-M series distribution transformer
Rated Capacity (KVA) |
Voltage combination |
Connection
Symbol |
No-load loss (W) |
On-load loss(w) 75 |
No-load
Current % |
Shirt-circuit Impedance
% |
HV (kv) |
Tapping range |
LV (kv) |
30 |
6
6.3
10
10.5
11 |
±5%
±2x2.5% |
0.4 |
Yyn0
Dyn11 |
100 |
600 |
2.1 |
4 |
50 |
130 |
870 |
2 |
63 |
150 |
1040 |
1.9 |
80 |
180 |
1250 |
1.8 |
100 |
200 |
1500 |
1.6 |
125 |
240 |
1800 |
1.5 |
160 |
270 |
2200 |
1.4 |
200 |
330 |
2600 |
1.2 |
250 |
400 |
3050 |
1.2 |
315 |
480 |
3650 |
1.1 |
400 |
570 |
4300 |
1 |
500 |
680 |
5100 |
1 |
630 |
810 |
6200 |
0.90 |
4.5 |
800 |
980 |
7500 |
0.80 |
1000 |
1150 |
10300 |
0.70 |
1250 |
1360 |
12000 |
0.60 |
1600
2000
2500 |
1640
1940
2300 |
14500
17140
20260 |
0.60
0.60
0.50 |
Note: we can design and manufacture special transformer as customers' requirements.
Ordering Instruction: 1.product model; 2.rated capacity; 3.voltage range; 4.regulation range; 5.frequency; 6.connection symbol; 7. technical requirements for special transformer. |
Certifications
Certificates owned by shenda:
100MVA/220kv power transformer short circuit test report
-issued by CESI Italy&CTQC China
120MVA/33KV oil EAF transformer
50MVA/69KV oil power transformer
10MVA/33kv dry-type transformer
Type test report
-issued by KEMA Netherlands
63MVA/110KV Power transformer short circuit test report
-issued by CTQC China
12.5MVA/22KV Rectifier transformer routine test
-issued by V-Check korea
ISO 9001&ISO14001&OHSAS 18001
CE-POWER TRANSFORMER&FURNACE TRANSFORMER&DRY-TYPE TRANSFORMER&REACTOR
Transformer Characteristics
Winding .
The winding must be especially protected - both against high electrical stress due to
external over voltages and against mechanical overloads by short circuits. They are made of copper or aluminum. Low-voltage windings are made of strip or flat wire while
high voltage windings are manufactured from round or profile wire. ("diamond-dotted paper") bonds the winding into a compact block
while drying and increases the short-circuit capacity additionally.
Magnetic Core lamination.
The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel lamination insulated on both sides,
guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a
flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise.
Oil tank.
Whether during transport or operation -the tank must be absolutely tight under mechanical stress. We have vast constructional experience, the most modern calculation methods and high-quality welding work. Special attention is paid to
corrosion protection. Pretreatment of the surface is processed by phosphating pickling, contributes to corrosion protection, just
like multi-coating with preset drying times for each layer. On request, hot-dip galvanization provides for even better protection
Test lab
Testing are conducted for every transformer before delivery.Tests are classified to be routine tests and type test.
A - Routine tests: According to IEC 60076 standard , the following tests must be carried out for all units of the transformers
a- Measurement of winding resistance .
b- Measurement of voltage ratio and check of phase displacement.
c- Measurement of short circuit impedance and load losses.
d-Measurement of no-load losses and current .
e-Dielectric routine tests including the separate source AC voltage withstanding test and short duration induced over voltage withstanding test ( ACSD ) .
B - Type tests :
The following tests shall be carried out
a- Temperature rise test
b- Lightning impulse test
C - Special tests :
a- Determination of noise level according to IEC 60551 .
b- Oil leakage test
c- Overload test at 150 % rated current for one hour after temperature rise test ( top oil temperature rise and winding temperature rise must be measured and recorded in the report test also hot spot temperature rise must be calculated and recorded on the report test ) .
d- Short Circuit Dynamic stability Test (test report from independent and accredited laboratory for similar transformer will be accepted).
Packaging and transportation
Company Introduction
SHENDA electric group is a manufacturer and wholesale company that manufactures good & high quality electric transformers from 2000. The company provides the customized products and OEM service. The factory own the 3 production base worldwide,2 in China and 1 in USA.We also own a transformer research institute with more than 30 electric engineers .
Our Services
1. Pre-Sale Service
- Quick response: reply you within 8 hours, to save your time.
- Professional solution: supply professional completed solution base on your technical requirements, to complete your technical plan.
- Quoataion: submit a competive price within 2 days, to promote your business
2. In Sale Service
- Supplying stipulated completed drawings
- Supplying manufacturing plan and processing photos
- Making the test plan and book hotel for the witness person
- Making good arrangement of the delivery and shipment
3. Afer Sale Service
- Supplying professional supervision and commissioning within 15 days
- Training the workers
- Providing 12 months waranty of quality and perforance
FAQ
| 1,Q: |
Are you manufacturer?
|
| A: |
Yes, we are manufacturer. Our factory is in JiangShan City, zhejiang Province.
|
| 2,Q: |
What is your delivery time ?
|
| A: |
Depend on the type of transformer.
|
| 3,Q: |
What is your payment term?
|
| A: |
30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it.
|
| 4,Q: |
Are your transformers supported for customization ?
|
| A: |
Yes, of course. We can design and produce accroding to the technical requirements and parameters of customers.
|
| 5,Q: |
Do you offer guarantee for the products?
|
| A: |
Yes. Different transformers is different. We offer at least one year guarantee for all of our transformers.
|
| 6,Q: |
Do you accept Factory Acceptance Test?
|
| A: |
Yes. It's available. And we are responsible for each set transformer's testing (ICE).
|
| 7,Q: |
Do you assign engineer for after-sale service?
|
| A: |
Yes. For our products,we all provide after-sale installation instructions service
|
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