38.5kv 4000kVA Three Phase Two Winding Power Supply Transformer

35kv 4000kva three phase two winding no load tap changing oil immersed power transformer

Specifications
1 power transformer
2 ISO9001,ISO14001,OHSAS 18001, CE
3 Apply for IEC, ANSI
4.KEMA

Introduction to Products
The performances of our S9,S10,S11 series 20KV and 35KV three-phase oil-immersed  transformer conform to standards GB1094-1996 "Power Transformer" and GB/T6451-2008 "Technical Parameters and Requirements of Three-phase Oil-immersed Power Transformer". Its core is made of quality cold-rolled silicon sheet and is of a full-miter non-puncture structure and its coil is made of quality oxygen-free copper. It is artistic in appearance and sage in running and is widely used in transmission and distribution of industrial and agricultural networks.

Main Function and Features

High reliabity,advanced levelof performance,reasonable economical indicators
The core joints are of stepped shape with 3 steps,and the surface of the core is coated with cured paint to lower losses and noise.
The winding has novel structure and its oil passage is reasonable designed. Its newly designed insulation structure helps enhance its mechanical strength and the short circuit withstanding ability
The oil tank is in various types,all have good outlook.

Main Technical Parameters for 35kv level,S9,S10,S11 series power transformer
Rated Power	High Voltage	H.V.Tap rang	Low Voltage	Connection Symbol	Short-Circuit Impedance(%)	No-load Loss(KW)			On-Load Loss(KW)			No-load Current(%)
KV	KV		KV			9type	10type	11type	9type	10type	11type
800	35              38.5	±5%      ±2×2.5%	6.3              6.6                                   10                         10.5	Yd11	6.5	1250	1110	980	9900	9350	9350	1.05
1000						1490	1320	1160	12200	11500	11500	1
1250						1760	1570	1380	14650	13900	13900	0.9
1600						2130	1900	1660	17650	16600	16600	0.85
2000						2610	2320	2030	19350	18300	18300	0.75
2500						3150	2800	2450	20700	19600	19600	0.75
3150					7	3870	3440	3010	24300	23000	23000	0.7
4000						4640	4120	3610	28800	27200	27200	0.7
5000						5490	4880	4270	33000	31200	31200	0.6
6300					7.5	6570	5840	5110	36900	34900	34900	0.6
8000				Ynd11		9000	8000	7000	40500	38300	38300	0.55
10000						10620	9440	8260	47700	45100	45100	0.55
12500					8	12600	11200	10800	56700	53600	53600	0.5
16000						15300	13600	11900	69300	65500	65500	0.5
20000						18090	16100	14100	83700	79100	79100	0.5
25000						21510	19120	16730	99000	93500	93500	0.4
31500						25650	22800	20000	1E+05	112200	112200	0.4

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



RFQ

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