25000kVA Electric Distribution Power on-Load Voltage Regulating Transformer

• Customization: Available
• Application: Power, Electronic, Lighting, on Load Regutation
• Phase: Three
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Multi-winding Transformer
• Certification: ISO9001-2000, ISO9001, CCC
• Usage: Single-phase Transformer, Combined Transformer, Power Transformer, Distribution Transformer, Substation Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: Ring
• Brand: China
• Frequency: 50/60Hz
• Rated Capacity: 30-2500kVA
• Coil Structure: Layer Coil
• Input Voltage: 10kv, 11kv, 15kv, 22kv, 30kv
• Output Voltage: 380V/400V
• Winding: Copper/Aluminum
• Cooling Way: Onan/Onaf/Odaf/Pfaf/Ofwf/Knan/Knaf
• Rated H.V.: 35kv
• Rated L.V.: 0.415kv
• Standard: IEC60076
• Vector Group: Dyn11/Yyn0
• Insulation Level: as Per IEC Standard
• Core Material: Silicon Steel
• Temperature Rise (W): 60-65K
• Warranty: 24 Months
• Transport Package: Wooden Case
• Specification: 1500.00cm * 1500.00cm * 2000.00cm
• Origin: China
• HS Code: 850434900
• Production Capacity: 6000pieces/Year
• Package Size: 178.00cm * 129.00cm * 150.00cm
• Package Gross Weight: 3500.000kg

Product Description

35KV on-load regutation power transformer has obtained multiple certifications and its product quality is favored by customers.
If your order quantity is large, we can customize the certificate for you need certificate.

Transformers Cores Matericals,we can customized two kinds of : Amorphous Alloy Cores or Silicon Steel Cores.

Power Transformers Coil Matericals,we also can customized two kinds of : Copper Coil or Aluminum Coil.
and There are more technologies to meet your needs.
I hope recive you massage.

Why i can say this information about custom Power transformer,Distribution transformer,Subtation transformer,Special transformer?
Because our factoy have more than 300 engineering and technical personnel,more than 1200 employees,covering an area of 240000 square meters.
Of course, our prices are reasonable and cheap, guaranteed to fit your purchasing plan.Dont't worry you plan.
We very much welcome all future partners to visit our factory and office.

Believe in the quality of our products.
Our products are mainly supplied to large national enterprises in China: State Grid, China Southern Power Grid,  China Railway, various types of hydropower stations, wind power stations, photovoltaic power stations, etc. Customers can be assured of product quality.

We also cooperate with large companies abroad. For example, ENERGOMAX LLC, GREENS LTD, UZTRANSFORMERLLC, Meta Power Solutions,CENTURY ENGINEERING CONTRACTOR LTD.,MALAYSIA PHASE 2 POWER STATION PROJECT,ETC.

Product Description

On load tap changing transformer ,use Japanese Toshiba analysis soft ware and our company special calculation and validation procedures to make sure the performance of products. Superior process equipment ,elaborate material selecting and efficient manufacturing make the transformer have small volume,light weight,low loss,low partial discharge,low noise characteristics.

The product is stable,reliable,economic, environmental protection.It can be applied to many places such as power plants,transformer substation,large industrial mining and petrochemical enterprise and so on.

OLTC Oil Immersed Power Transformer Core 

The core is beveled and stepped for maximum performance and minimal bulk. After the magnetic steel is produced by the cutting machine, it is continuously cut into specific lengths by the automatic stacking machine, and then automatically stacked. The correct size is ensured during the entire stacking and assembly process to ensure the high quality of the product.

OLTC Oil Filled Electrical Transformer Winding

The low voltage winding adopts the whole section of copper foil, which is wound on the special low-voltage foil winding machine with the F-grade insulation. The foil coil solves the outstanding problems such as low voltage, high current coil winding, high short-circuit stress, unbalanced ampere turns, poor heat dissipation effect, windingspiral angle, unstable manual welding quality and so on. At the same tim-e, the winding ends of our company aresealed with resin, cured and formed, moisture-proof and antifouling. The lead copper bar is automatically welded byargon arc welding.
 

On load tap changer transformer plays an important role in power system.It can not only stabilize the load center voltage, but also connect the power grid, adjust load current, improve reactive power distribution etc.Its basic principle is to lead out several taps from the coil on one side of the transformer, and switch from one tap to another through OLTC, without cutting off the load current.So as to change the effective number of turns and achieve the purpose of voltage regulation.

On load voltage regulation technology of transformer is widely used in distribution system, and also in step-up transformer of power plant. At present, almost all the large capacity transformers in the power system adopt on load voltage regulators,It is also equipped with a perfect low-voltage distribution network structure and sufficient reactive power compensation capacity to ensure  the safe operation of the power grid and meet the requirements of customers for power quality.
 

Oil Immersed Transformer Wiring Port:
High and low voltage wiring port with self locking nut.
Oil Level Measure Device:
Oil amount is clearly visble,red represents oil amount is
insufficient,blue represents normal.
Pressure Relief Valve:
Protect the oil tank from deformation or bursting.The water and air
outside the oil tank cannot enter the oil tank,and the inside of the
transformer will not be polluted by the air.
Off circuit Tap Changer:
It can be directly flxed on the cover or wall of the transformer,and can be tapped and replaced under no excitation state.
Gas Relay:
More sensitive sersing of changer in the internal gas of the transfomer to protect the transformer.
Oil Drain Valve:
Quick oil drain,reducing maintenance time,Convenient maintenance.

Transformer Test

Transformer ratio and connection
Measurement of load losses and short circuit impedance.
Measurement of no-load losses.
Separate source withstand voltage test
Induced over-voltage test
Temperature rise test
Lighting impulse withstand voltage test
Measurement of partial discharge
Other transformers like rectifier transformer are also available on request.
 

Product Feature

1.No load voltage regulating transformer need to adjust the tap of high-voltage side only when the power is cut off, 
so as to change the ratio of the transformer to regulate the voltage at the low-voltage side.Its regulation range is small, generally within ± 5%, It can only be adjusted once or twice a year.Most transformers in power system are no-load tap transformers.

2.The on load tap changing transformer has a special switch, which can change the tap position without power off (with load).Its voltage regulation range is large, generally more than 15% or even up to 30%, and it can be adjusted  automatically for several times a day.

3.No excitation voltage regulation refers to no-load voltage regulation,which can be adjusted only when the transformer is off.On load tap chaning transformer can change the voltage by changing the tap position when it is on running.

4.OLTC switch has the advantages of frequent on-off, no spark and long service life.The traditional trigger circuit of power electronic switch has the 
problem of electrical isolation.The application of optical fiber communication technology to the medium and high voltage trigger control system
 can effectively solve the problem of high and low voltage electrical isolation.

Advantage of materials
 
1.because we use oxygen-free copper lines of lower resistivity, which will become smoother and burr-free after series of additional surface treatment, so the load loss of our transformer is lower and the electric performance is better.
2.We use high-quality silicon-steel plates which are of lower unit loss, and no-load of the transformers is lower;
3.We use high-quality wooden laminating insulation pieces, which won't split or move even under the influence of short circuit;
4.We use thoroughly filtrated transformer oil containing less water ,gas and impurities, which makes our transformer work better;
5.We use high-quality rubber sealing material, which can prevent the transformers form aging or leakage;
6.All materials has passed the quality testing, and all the raw material factories has pass through the national standard ISO9000 inspection.

More Product Parameters

Oil Filled Electrical Transformer

10kv-35kv Distribution Transformer
Rated Power(kva)	High Voltage(kv)	Low Voltage(kv)	Connection symbol	No-load loss(w)	On-load loss(w)	No load current(%)
400kva	10kv 11kv 20kv 35kv	0.4	Ydn11 Yyn0	570	4300	0.45
500kva				680	5410	0.45
630kva				810	30800	0.4
800kva				980	7500	0.4
1000kva				1150	10300	0.35
1250kva				1360	12000	0.3
1600kva				1640	145000	0.6
2000kva				1950	19140	0.6
2500kva				2340	22220	0.5

Certifications

Customer Reviews

Company Profile

Our company has a relatively strong production capacity and efficient marketing team.Products include 110KV,220KV large ultra-high voltage transformers and 35KV below various dry transformers,oil-immersed transformers,amorphous alloy transformers,pre-installed substation and various specifications of box transformer,furnace transformer,rectifier transformer,mining transformer and other special transformers.All products of the company have passed the routine,type and special tests of the National Transformer Quality Supervision and inspection Center and wuhan High Voltage Research Institute of the State Electric Power Corporation.The enterprise has passed IS09001:2015 quality management system certification;Jiangsu province enterprise measurement certification;At the same time,10KV,35KV class power transformers,box substation and the adoption of IEC certification.Product sales cover the national market,but also exported to Australia,New Zealand,India,Madagascar,Vietnam and other countries and regions.

Transformer for On-site installation

FAQ

1.Who are we?
We are transformer company, based in Jiangsu, China, start from 2007,sell to Domestic Market(80.00%),Southeast Asia(20.00%). There are all about 1200-1500 people in our company.

2.How can we guarantee quality?
 Always make a final Inspection before shipping.
 

3.What can you buy from us?
110kV-220kV Oil-immersed Power Transformer,Dry-type Transformer,Unpacked H Grade Dry Transformer,Oil-immersed Distribution Transformer, Pad-mounted Transformer,Enameled Wire,Composite Wire,Transposed Wire,Paper Covered Wire,Film Wrapped Wire.
 

4.Why should you buy from us not from other suppliers?
As an enterprise specializing in transformer production for 31 years, we have high quality, fast delivery, guarantee after-sales service and factory price. What's more, we have ISO9001-2008, OHSAS 18001:2007, ISO4001:2004L ,UL ,CE certificates and IEC, ANSI, KEMA, GOST standard.
 

5.What services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW; Accepted Payment Currency:USD,CNY; Accepted Payment Type: T/T,L/C; Language Spoken:English,Chinese.