Channel International Ltd.

Power Transformer (35kV)
Oil-immersed Transformer
Products structure and technical features
The oil-immersed transformer produced by our factory have these advantages: low loss, low noise, high short circuit strength and good appearance. We company create these prefect products of that each parameter has reached to advanced level among domestic similar products by combining advanced manufacture equipments and technology.

Structure features:
Core and main body: it is used iron core cutting line ,all inclined ladder joints and improving flux trend to eliminate flux saturation phenomenon of iron core in joints . By doing these, it reduces the no-load loss, no-load current and noise of transformers. Adopting pulling-plank structure, in order to strengthen the ability of withstanding short-circuit, we put many nails around pressing planks and bracing plates are used as support between H.V and L.V yoke, make the iron core be a whole. The iron core sheet are coated by glue which are specialized for silicon steel , so that all silicon steels can be bonded together to make the iron core be  integral one, this effectively enhances mechanical strength and plays a positive role in the core anti-rust. The low part of the body and the oil tank are supported through bracing plates adopt" high intensity electric laminated" technology, to guarantee the low part of oil-immersed transformer's body safe and reliable.

Coil: The high-voltage(HV) coil adopts an interleaved-continuous structure, The low-voltage(LV) coil adopts an interleaved-continuous or spiral structure, are independently provided with voltage-regulating winding to balance the ampere turn of each winding-up, effectively lower the mechanical force to minimal level. In the transformer winding, there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the temperature rise of the winding and the hot points of the winding and prolong the service life of insulation.

Oil tank: the tank's structure of oil-immersed transformer is bell jar type or suspended type, have a good looking and high mechanical strength. It adopts" flanged joint" technology in every key point (such as annular tubes, pressure valves, switches,etc.), which effectively avoid leaking oil.

Technical Parameter and features

Technical specification
1,voltage:35kV
2,voltage regulation: on load tap regulation ,off circuit tap regulation
3,capacity range:

S(B) H15 Amorphous Alloy Transformer (10kV, 20kV)
Amorphous Alloy Transformer
Product introduction:
Oil immersed transformer with amorphous alloy core is a new generation of energy-saving product. The iron core is the amorphous alloy material which imported from aboard. Its special advantages is low-load loss. Amorphous alloy transformer is widely used for urban and rural distribution network, especially applicable for the areas and users that pay attention to energy saving.
Product features:
No-load loss
It has the amorphous alloy which is a kind of soft magnetic material with same character in different directions. Its magnetization power is low, resistivity is high and loss of eddy current is low. The no-load loss and no-load current of the iron core used in this kind of transformer is very low. Compared with silicon steel S(B)9 series transformer, the no-load loss decreases about 75% and it decreases about 65%, compared with silicon steel S(B)11. It reduces the operation cost. It is very energy-saving.

Wind Power Generation Transformer
New Energy Dedicated Transformer
Product structure and features
General introduction
With the continuous growth of China's economy, the demand for electricity surged, energy has become the main contradiction. Because the traditional coal-fired and fuel power generation caused serious environmental pollution, so in order to be consistent with environmental protection requirements, wind power as a clean energy production that has been developed rapidly in our country , has become the main direction to solve the energy shortage. We company develop a series of wind power generation combination substation, which can change 690V voltage generated by wind power dynamotor to 35kVor 10kV voltage through rising and changing voltage, then send to gird system or users, finally finish the task of wind power generation. So, wind power generation combination substation is the best matching product of wind power generation system.
Structure and performance features
1, structure features
A, main body adopts the structure of common box transformer. Assemble high-voltage load switch, plug-in fuse, transformer body, off-circuit tap-switches and other H.V components in a sealed tank, transformer oil as insulating medium, its size is small and performance is excellent .

B, Overall combination type wind power substation is composed of H.V chamber, L.V. chamber, oil tank and radiator. Install chip radiator on the side of oil tank, the chip radiator is combined by guide pipe and cooling fin which can better adapt to high-power transformerâ??s cooling requirements. In order to prevent vandalism, to these cooling fins with weak mechanical, we will use steel shield that be punched cooling holes to enhance the protection. By substation, rise the voltage of power generated through wind dynamotor and merge into grids.

PV Power Generation Transformer
New Energy Dedicated Transformer
Product Introduction
In order to meet the needs of our national PV power generation, our company developed two series of PV power generation transformers on the base of wind power generation combination transformers.
1, ZG(F)SF11-Z.G-â?¡/35 series three-phase split type off-circuit voltage-change PV power combination transformer
The structure of this series of products is same as that of wind power generation transformers, except that L.V. side winding, outlet method and electrical equipments adopt special structures. L.V side is equipped with double-split winding and two outlets which can be connected with two PV generators at the same time, meanwhile, equipped with essential protective electric elements. This series of products are with characteristics of good electrical performance, small size, light weight, reliable operation, easy to install, high cost-effective, etc.
Features of productsâ?? structure
a, design thought: adoptsâ?� two generators, one transformerâ?� program, means two PV generators combines with one transformer. L.V side is equipped with double-split winding ,two outlets and L.V electric system which can be connected with two PV generators at the same time.
b, users can rise one transformerâ??s output capacity under the capacity of same generators, which can save usersâ?? investment and operational cost.
c, materials of transformersâ?? casings can be chosen according to different environmental requirements: conventional composite panels, stainless steel composite panels, non-metallic fiberglass cement, etc.
d, casing material has a good level of protection and corrosion resistance, which can effectively prevent wind, rain, snow and salt erosion
e, H.V. electrical equipments have five protection functions: H.V. fuse of substations and overload switchgear carry out interactive protection, prevent transformers working under the condition of lacking phase; H.V use three-position load switch that can be checked and repaired safely under the state of grounding; H.V overload switch and grid door of transformer chamber adopt â?? electric locking, realize the protection function of automatic power-off when mistakenly open the grid door.
f, transformer chamber adopts natural ventilation and automatic controlling forced cooling exhaust devices, has a exhaust system which can be controlled automatically with temperature change, can effectively control and low chamberâ??s temperature, meet the need of full overload operation.
g, low voltage equips with 690V main circuit breakers, over-voltage protection equipments , and we can design complete automatic measurement and intelligent control systems.

Casing of Transformer
Casing of Transformer
Product Introduction
It is not necessary for general dry-type transformer to equip casing, means the protective degree is IP00, if need to be equipped with casing, protective degree is IP20, Casing is constituted by a safety shield to prevent accidental electrocution. Under the conditionof having dripping water, the transformer can be equipped with casing of that protective level is IP23. According to users  special requirements, we can provide casing with IP54 protective level.
Temperature Controlling and Cooling Devices
Temperature controlling device

Transformer adopts BWDK temperature controlling device, temperature measuring component is in the top of low voltage winding that can detect automatically and cyclically display working temperature of three-phase winding. When the temperature of winding reaches setting value , thermometer can automatically start the fan, stop the fan, signal transfer output, tripping output, etc.
Air cooling device
Transformer is equipped with dedicated Axial flow cooling fan, transformers capacity can be increased by 40%, even more under the condition of forced- air cooling.

Distribution Transformer (10kV, 20kV)
Oil-immersed Transformer
Products structure and technical features
Electricity is transferred to users from power stations through transmission and distribution system's voltage conversion. Firstly transferred via high voltage transmission lines, then lower the voltage in substations, lastly be fit to use. Distribution transformer locates closely to terminal users will lower voltage at a suitable level. Transformer , lower voltage at a level which is suitable for electrical equipments, is called distribution transformer, used in daily lighting and factory producing, low voltage is usually less than 0.4kv.In addition , distribution transformer's capacity is small, usually less than 3150kVA; and primary voltage is also low, at less than 35kV.
Our distribution transformer adopt "CAD" design concept and its performance is accord with IEC60076,GB1094,GB/T6451.The core is manufactured with high quality cold rolled grain-oriented silicon steel, and steps overlapping structure is used for core manufacture, after overlapping, brush special hardener to make cores solid, thus to effectively reduce no-load loss and noise. The oil tank is corrugated structure, produced by our factory's oil tank automatic production line; surface pre-treatment solution and coated powder all use high-quality brand products; firstly be shot blasted, then spray powder, at last solidified in high temperature, so our oil tank has strong corrosion resistance. Winding is manufactured with high strength enameled wires(or paper covered wires),ampere-turns evenly distribute, insulation structure is reasonable, so winding's short circuit impedance is excellent. The body of distribution transformer adopts suspended structure, all sealing surface use quality acrylic rubber, can effectively prevent cold aging.
Technical Parameter and features
Sheet 1, Basic performance parameter of S11 type 10kV three-phase oil-immersed distribution transformer

Resin insulation dry type transformer (scb)
Dry type transformer
Our company dry type transformer is made of epoxy resin and adopts foreign advanced technology and cad design.  the core is manufactured with high quality cold rolled grain-oriented silicon steel and steps overlapping structure is also adopted for the core design, thus to greatly reduce no-load loss.  winding is manufactured with high quality epoxy resin, coil casting process is completed by automatic vacuum casting equipments. The epoxy resin is with characteristics of good penetrability and no bubbles, so its partial discharging volume is small. Dry-type transformers with advantages of strong overload ability, good thermal stability, small size, light weight, easy to install, exemption from maintenance can be widely used in high-rise buildings, commercial centers, airports, railway stations, docks, subways, factories and underground distribution stations.

MNS Type Low Voltage Draw-out Switch Cabinet
MNS Type Low Voltage Draw-out Switch Cabinet
Product Introduction
MNS type low voltage draw-out switch cabinet ( hereinafter called switch cabinet) is designed and developed by ourselves, combining with the status of domestic low voltage switchgear. It belongs to new generation of drawer type switch cabinet. Novel structure, compact and reasonable layout, advanced and reasonable component modeling, meet the needs of electric system with AC50-60HZ, 4000A rated current and 660V rated voltage or less, as a controlling equipment of power generation, transport, distribution and change. Thus, switch cabinet is widely used in power plants, substations , factories, mines, petroleum, chemical, high-rise buildings and other power distribution sites.

Product features
The main frame is molded by pressing C-type aluminum-zinc sheet metal forming, is whole assembly structure. Structure is compact, can operate on the positive side, also can be on the opposite side, protective level of casing is IP3X.
Each function chamber is isolated from each other, divided into function unit chamber, bus-bar chamber and cable chamber. The role of each chamber is relatively independent.
Horizontal main bus-bar adopts laid flat after cabinet â?�arrangement method, to enhance the ability of bus-bars anti-electric, then aid the main power lines gain the capability of bearing high short-circuit strength.
Drawers can be designed to 1/4 1/22 3, these five standard drawer unit, drawer unit is equipped with mechanical interlock devices. Use high-strength flame- retardant engineering plastics to form, with high security.
Switch cabinet has two outlet types: right outlet and rear outlet
Dont need special complicated tools, easy to install

H grade non-encapsulated insulation dry type transformer (sg)
Dry type transformer

Our factory h grade non-encapsulated insulation three-phase dry type transformer is manufactured with nomex insulation material which approbated by ul, and has many advantages of safe, reliable, energy-saving, fire-proof, explosion-proof, easy to maintain. Its design is advanced, structure is reasonable, appearance is pretty. Meanwhile, its main performance are superior to domestic standards, such as partial discharging level, no-load loss, with-load loss, low noise and can work under conditions with high damp, etc. It can be installed in areas with large load, be suitable for high-rise buildings, airports, railway stations, docks, subways, hospitals, electricity factories and so on.
Characteristics of h grade non-encapsulated dry type transformer:
1, the elaborate designed coil structure and vacuum immersed treatment enablesg(b)10 transformer partial discharging volume be very small, less than or equal to 5pc. No crack performance will be found during the whole service life, and its insulation level will be kept as good as beginning .
2.The high voltage part adopts continuous wire winding. Lv foil winding, vacuum immersed, curing processed and high strength ceramics supporting, with fine withstandcapability to paroxysmal short-circuit current
3.Flame resisting, flameproof, nontoxic, self-extinguishing, fireproof.
4. When burn in high temperature and open fire, almost no fume will be produced
5. Insulation level of the transformer is h gradeâ 
6.The insulation layer is very thin, with strong shorttime over load capability, needlessof forced cooling, can be overloaded for 120% for long term and 140% for 3 hours.
As this kind of insulation material has elasticity and will not be aged, it can be full loaded at once under suitable conditions.

Rectifier Transformer
Rectifier Transformer (ZPS, ZBS, ZSS)
Product Introduction:
Rectifier transformer is for power transformer with rectifier device. Its role is to provide AC power for the rectifier. Then the rectifier will change AC power to DC power supply. Itâ??s mainly used in the metallurgy, chemical industry and some other industry. Itâ??s low-loss, low-noise, shock resistant, and short-circuit resistant. Rectifier transformer also has the advantages of strong ability of over-load, compact structure, small size, reliability of power supply. 
Product Features:
Stable electrical performance: combing the load feature and the status of fluctuation of electric grid and voltage, atmospheric over-voltage, according to the rectifier transformer load conditions, determine a reasonable and reliable insulation level and insulation model, to ensure the reliable and stable electric performance of the product. Environmentally safe coefficient of the productâ?§1.67.
High degree of dynamic stability: the winding has a high mechanical strength , with a strong ability of anti contingencies, to meet the bad environment of load. During the process of design and manufacture, it eliminates the dynamic unstable source caused by magnetic leakage or non-normal transportation. The product has high dynamic stability. The resistance is 30% higher than the power transformer with same capacity.
Good thermal stability: advanced product design. The heating part and temperature rise of the hottest dot are strictly controlled, with sufficient temperature margin. If necessary, additional axial oil duct can be added in the coil. Cooling way can be chosen according the load loss value of the coil, then to allocate the oil flow reasonably to reach the best cooling effect. Main temperature rising index is at least 5C lower than national standard. Copper wire is used as coil and down-lead, selecting low current density.
High ability of overload: the product comes with strong capacity of over-load and over-voltage. It can be operated safely in long-term under the condition of rated load. It can be operated safely in long-term under the condition of 100% full load ( environment temperature 40C);the terminal on the transformer connected with the motor can bear 1.5 times the rated current, which is 5S. Load character is fully considered during the product design and manufacturing. Temperature rising, insulation properties and choice if attachment are considered to meet the overload requirements.
Superior performance index: no-load current design. Manufacturing capacity is lower than that of normal transformers with same capacity that regulated by national standards.
Obvious energy-saving, low noise
Simplified structure, elegant appearance. The oil tank adopts the technology of anti-leakage to avoid the leakage, eliminating the fuel tank leakage.

Modulating Capacity Transformer
Special Transformer
Modulating capacity transformer is one kind of distribution transformers, which has two capacities ( one is small , another one is large) and can adjust according to the load size. The changing of high voltage winding connection mode, the conversion of low voltage winding parallel series and the adjustment of every connection are finished by special no excitation modulating capacity switch. Meanwhile, when large capacity is adjusted to small capacity, no-load loss and no-load current will be reduced because the increasing of low voltage turns and the decrease of coreâ??s magnetic flux density reduce unit loss of silicon steel, thus reaches the purpose of lowing loss and energy-saving. Double voltage distribution transformer has one small and one large voltage, and can adjust according to electric grids voltage. The conversion of high voltage winding parallel series and the adjustment of every connection are finished by special no excitation modulating capacity switch.  
General introduction 
SZ11-T load modulating capacity transformer is one kind of distribution transformers with new technology and energy-saving. It has two kinds rated capacity, one is small and another one is large, and the operation mode of these two capacity can be automatically converted which solves the problem of transformersâ?? large loss caused by relatively large changes of 10 kV distribution grids seasonable magnitude, and also solve the operational maintain problem because capacity must be adjusted by hand after the outage of no-load modulating capacity transformer power . Modulating capacity transformer not only suits rural electric grids which seasonable magnitude changes are relatively large, but also suits downtown, development zones, industrial zones and other distribution work area where circadian load changes are obvious.
 Working principle
Load modulating capacity transformer is adjusted by the intelligent controller externally modulating- switches, thus completing the convert process of high capacity and low capacity, more details as below: intelligent controller determines the current load size by detecting transformers voltage and current of low voltage side; determines related constraints based on the capacity setting value; if meet the setting conditions, intelligent controller will issue the corresponding control commands to load modulating capacity switch, then modulating capacity switch can finish the star ,angle change and the parallel series convert of transformer s inner high voltage winding, low voltage winding; completes the process of capacity adjustment under conditions with power.

USA-type Transformer Substation
Box-Type Transformer Substation
ZG(F)S series prefabricated substation, also called USA-type transformer substation, is an new-mode complete set of power distribution equipments that absorbs foreign advanced technology and design concept. It is also can be used in our national power girds, including these distribution systems of industrial and mining enterprises, high-rise buildings, residential areas, stations, port terminals, especially suitable for alteration of urban and rural power grids, not only reduces engineering investment and occupying area, but also shortens the installation period.
Products features
Novel design, innovative structure, smaller volume
The high voltage overload switch, plug-in fuse and backup protection fuses are placed in transformer insulating oil tank, thus substations volume becomes smaller whose occupying area is only 1/3-1/5 of normal products.
Fully enclosed, fully insulating, safe and reliable
Transformer oil tank is fully enclosed structure without conservator. The high voltage inlet wire adopts connections of elbow-type cable plug and high voltage bushing, live parts sealed within the insulator, shape a fully insulating structure. Terminal surface is zero potential which can guarantee human safety.
Advanced protection principle, economic and reliable, easy to operate
Using full range protection mode of double fuse in high voltage side and supplemented by low voltage undervoltage protection to make operation reliable and easy. The body of transformer is used with S11,S13 series, its winding adopts Dyn11,with characteristics of neutral point not drifting, good lightning performance, low loss, low noise, etc.

European-type Transformer Substation
Box-Type Transformer Substation
Product introduction:
XBF1,YBM series combination substation, is a complete set of equipment making the optimal combination for high voltage switch, power transformer and low voltage switch.
European-type transformer substation is with such advantages complete sets of strong, small footprint, low investment, easy installation and maintenance, attractive appearance, strong weather resistance, etc. Our company can design semi-submerged or buried whole type substation based on special conditions, so as to avoid blocking the line of sight, electromagnetic interference.
Normal operational conditions
a, environment temperature:-25C - +40
b, altitude less than 1000 meters;
c, relative humidity less than 90% (+ 25 ), to allow short-term up to 100%;
d, installation place without risk of fire, explosion, chemical corrosion and severe shock
e ,discuss with us for special operational conditions
Product structure and appearance

XGW15-12/24 Outdoor Intelligent Sub-section Post (Outdoor Ring Net Cabinet)
Outdoor Intelligent Sub-section Post
Product Introduction
With the continuous development of social progress, China's urban power grid has undergone tremendous changes, and most cities have formed or are forming more and more electricity load intensive areas. The past mode that power from 12/24kV line of substation supplied to direct users is difficult to meet the needs of urban development. Thus the mode of supplying power through sub-section post is created. However, with the intensification of urban densification, some of the original civil-type sub-section post has been limited because of land and urban planning, resulting in the appearance of more advanced and practical outdoor intelligent sub-section post( outdoor ring net cabinet).This kind of sub-section post, does not need civil and occupies less area, configuration is flexible, power supplied method is reliable, installation and debugging time is greatly shortened, the overall cost is also reduced.
With the development of modern industry, the degree for automation and  intelligence of electrical controlling equipments is increasingly higher, making use of modern electronic technology, sensor technology, communications technology, computer network technology to integrate electrical equipments' monitoring, protection, control, measurement under normal or accidental conditions, to achieve good governance, of which has become an inevitable trend and main direction of development.
Intelligent sub-section post (outdoor ring net cabinet) adopts and refers to aboard advanced technology. Install and debug 12/24 KV PT, sub-section post FTU,RTU,CCU , 12/24kv measure and automatic reading meter, USP power supply and instruction meter, then put into a movable, sealed moist-proof, stainless steel box, which help achieve the integration of urban distribution grids' first, second system and modularization of assembly, shorten the construction period, greatly improve the reliability of the urban power grid operation.

DFP Type 12/24/35kv Outdoor Cable Distribution Box
Outdoor Cable Distribution Box
Product Introduction
DFW type cable distribution box is a kind of outdoor high-voltage electrical equipment of that rated voltage is 12/24 / 35kV, rated current is 630A , for the connection and cut of power cable.
Structure features
This products adopts "high-performance hexafluoride load switch with SF6 insulation gas inside" and "shielded silicon rubber cables separable connector", with strong drop-out ability of active load and no-load cable current and strong closing ability of short-circuit current, what's more, we can install lightning arrester and ground fault indicator according to users' request.
Each ring connecting lines of this series of products are equipped with vacuum load switchgear or circuit breaker, any branch circuit is free to withdraw and put into operation, and other ring circuits are not affected; can install extra fuse on load switch, when one branch circuit has short-circuit accident, the fuse in this branch circuit can break accident circuit immediately, and impact load switch's release to let it trip, isolate accident circuit, which can ensure non-accident circuits' continuous power supply.

GGD Type AC Low Voltage Distribution Cabinet
GGD type AC low voltage distribution cabinet
Product Introduction
Introduction and usage
GGD type AC low voltage distribution cabinet is suitable for power plants, substations,factories,mine enterprises whose distribution system is with 50HZ AC,to 3150A rated working current, used for power change,distribution and control of power, lighting and power distribution equipments.
GGD AC low voltage distribution cabinet is a kind of new type low-voltage distribution cabinet, designed based on the requirements of the Department of Energy in charge  of the higher level, the majority of electricity users and design department, and with principles of safe, economic, rational and reliable. It is with these characteristics of high breaking capacity, good dynamic thermal stability, flexible electrical program, convenient combination methods, series, practical, novel structure, high level of protection, can be treated as a replacement product of low voltage switchgear assemblies.
GGD type AC low voltage distribution cabinet meets the standard of IEC43Low-voltage switchgear and control gear, GB7251Low-voltage switchgear assembliesOperational conditions
1, surrounding air temperature not more than +40°C, not less than -5°C, average temperature over 24hs cannot more than +35°C
2, installed in indoor, altitude not higher than 2000m
3, surrounding air relative humidity at the highest temperature of + 40 not more than 50%, at a lower temperature allows a greater relatively humidity( for example, temperature is + 20 , humidity can be 90%), should consider the influence of condensation caused occasionally due to the temperature change.
4,the inclination between cabinet and vertical plane not exceed 5%
5, cabinet need be installed in the place without severe vibration and shock and where is insufficient to corrode electrical components.
6,users can consult with manufacturers if have special request.

Dedicated Accessories of Box-type Transformer Substation (USA type)
Product Introduction
Dedicated Accessories of Box-type Transformer Substation (USA type) include L.V outlet duct,Insulation operational pole,H.V. Brushing,Plug-in fuse core,Fully insulation brushing accessories,H.V. load switch,Pressure release valve,Charged displayer and so on.
Our technology is strong , manufacture process is advanced, equipments are excellent and testing modes are complete. Meanwhile, we have a professional team that everyone has sense of responsibility, exploiting and innovating. We have advanced design concepts , we can grasp the pulse in the design filed of the transformer exactly and form unique thinking of special design, manufacturing and market development. We also have passed ISO9001 quality management system ,ISO14001 environment management system and PCCC certification. Our products performances are superior to national standards and IEC standards. We have got the approval of National Transformer Quality Supervision and Inspection Center.

Corrugated Oil Tank
Corrugated Oil Tank
Product Introduction

Corrugated oil tank is produced by oil tank automatic manufacture line, surface treat liquid and coated powder adopt brand products. Oil tank is handled by electrostatic powder spraying after the process of degreasing, acid washing, phosphorization and electrophoresis, then cured with high temperature, make the surface of transformer have strong anti-corrosion ability.