Product Category
Power transformers are a crucial part of Ceho manufacturer's comprehensive product portfolio, providing reliable protection and efficient transmission for power systems. We employ advanced design techniques in manufacturing these products, offering both oil-immersed and dry-type transformers.
Ceho will provide advice based on your specific needs. If you intend to use it indoors, especially in environments where fire safety is paramount, such as high-traffic shopping malls, high-rise residential buildings, or schools, we recommend dry-type transformers. They use air or resin as the insulation/cooling medium, eliminating the risk of oil leakage and simplifying maintenance.
However, if you are using it outdoors or in industrial substations, oil-immersed transformers offer better heat dissipation and overload capacity, making them more economical and efficient for high-rated power applications.
We provide comprehensive after-sales service and technical support, and also offer some product maintenance suggestions. Ceho products are relatively easy to install and maintain, requiring minimal checks or component replacements; regular inspections from necessary angles are sufficient.
The most basic and simplest method is visual inspection. Oil leaks, corrosion, the color of the silicone in the breather, and the integrity of bushings and gaskets are often detectable visually. If these issues arise during daily operation, they can be addressed immediately. Afterwards, electrical testing can be performed. For any questions or regarding how to develop a maintenance plan under operating conditions, please contact Ceho.
If possible, we recommend performing thermal imaging inspection, using an infrared thermal imager to identify hot spots on the bushings, joints, and tank surface. If you purchased one of our oil-immersed transformers, dielectric strength, moisture content, and dissolved gas analysis are also necessary to rule out internal faults through oil analysis.
The Box-Type Substation features a compact, integrated design that combines medium-voltage switchgear, distribution transformers, and low-voltage switchgear into a single unit, offering a stand-alone power distribution solution from Ceho. It efficiently converts power from 11kV or 33kV medium-voltage sources to 400V/230V low-voltage outputs. Its prefabricated design also minimizes on-site installation time, making it a quick and convenient option.
Box-Type Substation installation is quick and easy, but it can't be placed anywhere.Make sure that the site you choose has a simple, horizontal concrete base or foundation that can withstand the total weight of the substation. Please confirm in advance whether the drainage measures for clear position are in place. If the oil-immersed transformer is used, the lower oil seal shall be set.
The formal installation is actually very convenient. The unit has been assembled, wired and tested in Ceho's factory. The site only needs to be placed on the foundation, connected to the incoming line, functional test and inspection. If you are not satisfied with the current setup in the future, it is possible to expand and renovate it. The easiest way is to add feeder panels at the low-voltage switchgear level. However, if it is a capacity upgrade or a medium-voltage switchgear renovation, it is recommended to contact us and Get a more targeted renovation plan.
Ceho is a China supplier that offers a complete range of product solutions for power systems, including switchgear, a device used to control, protect and isolate electrical equipment. With this equipment, electricity can be safely and reliably transmitted from the power station to the end user. We have always kept pace with the changes and developments of the times to carry out product research and development innovation, advanced monitoring and smart grid functions will be able to improve operational efficiency.
We can provide you with products, mainly low-voltage switchgear and high-voltage switchgear, in addition, if divided by voltage class, the market will also see medium-voltage switchgear.
Low-voltage, is used in the rated voltage below 1000V power system, for daily life, household, commercial, and not counting some small industrial applications is a very suitable choice to protect low-voltage circuits.
The high-voltage is used for power systems with rated voltages above 36kV, large-scale power transmission and high-voltage distribution must choose this product, otherwise there is no way to maintain the safety and stability of high-voltage power systems.
We can summarize the core functions of switching equipment in a few words: switching, protection, and isolation.
The switching function is easy to understand; switching equipment can disconnect and connect circuits. It is commonly used to control power supply during normal operation, and also to disconnect power when it is necessary to stop the power supply for maintenance or repair.
In terms of protection, the main functions are overload and short-circuit protection. Based on set current or voltage thresholds, the equipment will automatically disconnect the circuit in case of overload; otherwise, electrical equipment may be burned out, and in more serious cases, it may cause a fire.
The isolation function completely isolates the circuit from the power supply during maintenance or repair, protecting the operators.
Contact Ceho to purchase our Instrument Transformer, as well as other products that can configure a complete set of electrical equipment for you. This specialized device reduces high voltage and high current to standardized low levels, providing the necessary isolation between high-power primary circuits and low-voltage secondary circuits, and is also a precise and efficient device.
Current transformer and voltage transformer, these two are the main types, but there is a more special category, also Ceho can be systematic, that is, combined instrument transformer.
Current transformer is used to reduce high primary current to standard secondary current. Its primary winding is connected in series with the conductor of current to be measured. The output of secondary winding is connected to ammeter, power meter, electric energy meter and protective relay.
Voltage transformers are used to reduce high system voltages to standard secondary voltages, with primary windings connected in parallel between phase and neutral conductors, or between two phases.Secondary outputs are used for voltmeters, wattmeters, frequency meters, synchronizing devices and protective relays.
The combination is also very easy to understand, that is, integrating the two of them together.
The choice of load pairs is important to maintain nominal accuracy.The total connection load includes the impedance of all connecting wires, terminals and connected equipment, so when selecting, confirm that the rated load of instrument transformer is equal to or greater than the calculated total connection load.If you are unable to confirm this by yourself, please contact Ceho with the relevant information and we will work out the perfect one for you.
Contact Ceho and buy our high-voltage electrical components, which are not ordinary components, but the cornerstone of the power infrastructure. Choosing the right components for safety, service life and continuity of operation, while quality is also a very core element, we will provide you with a one-stop solution.
For high-voltage electrical components, the rated voltage is the maximum system voltage they can withstand under normal operating conditions and is related to the continuous operating limit of the component. The withstand voltage is a higher test voltage applied to the insulator, the duration is relatively short, and the insulator needs to be able to withstand it without breakdown, so as to maintain stability under transient and surge voltages.
System Voltage: The maximum system voltage for which the component is designed.
Dielectric strength: verify withstand voltage of power frequency (50/60Hz) and lightning impulse (1.2/50 μs).
Rated current: continuous current-carrying capacity, ambient temperature and potential overload must be considered.
Short-circuit performance: withstand thermal stress and mechanical stress generated by maximum fault current within specified duration.
Environmental conditions: For outdoor components, consider pollution level (IEC 60815), altitude, ambient temperature range, seismic activity and UV exposure.
Partial discharge: bushing and terminals and other key components, low partial discharge level is a key indicator of long-term insulation integrity.
Material and durability: porcelain, composite polymer, with different advantages.
Low-voltage circuit breakers are important for electrical protection and automatically cut off circuits in case of overload, short circuit or fault conditions, whether in daily life or industry. Ceho is a professional manufacturer and supplier, experienced in the industry, can contact us for specific information on this equipment, customized targeted configuration.
Auxiliary contacts: used to remotely indicate the status of the circuit breaker.
Alarm contacts: indicate tripping conditions caused by overload or short circuit.
Undervoltage release: circuit breaker that trips automatically when the line voltage falls below a set threshold.
Shunt trip: allows remote tripping of the circuit breaker by external signals.
Motor operator: remote on/off operation of circuit breaker.
Locking device: equipped with padlock for safety locking/tagging procedure.
Terminal covers: prevent accidental contact with live parts.
Communication suite: for integration into building management systems and monitoring and data acquisition systems.
Maintenance of low-voltage circuit breakers, the specific cycle should be judged according to the operating environment and operating frequency. Visual inspection and mechanical testing every 1-2 years if stable, clean and infrequently used. But if you are using it in harsh industrial environments, or very critical applications, it is recommended that you perform a thermal imaging inspection every year to check for hot spots, and a comprehensive electrical test every 3-5 years.
Ceho recommends insulation resistance check, contact resistance measurement and injection test. If you find specific problems or feel that you need to replace and upgrade, you can contact us and obtain technical support.
In the field of industrial power distribution and control, High Voltage Switch is very important, if you are looking for a product that can perform perfectly in extreme conditions, you can contact Ceho immediately.
High-voltage switches and high-voltage circuit breakers are different in function and application scenarios. If you ask the most fundamental difference, it is mainly functional, and the function determines the use.
High-voltage switches are used for normal circuit connection and disconnection, to operate without fault, and are often used for equipment maintenance and load switching. The protection function of the high voltage circuit breaker makes it more suitable for use in fault situations such as short circuit and overload.
Don't worry about choosing inappropriate products, contact Ceho, we will work out specific solutions for you, if you want to consider the general direction first, these points are the ones that need to be paid attention to, the first is rated voltage and current, in short, you can't choose those that don't conform to the power system.Secondly, its switching capacity needs to be able to withstand load currents and potential short-circuit currents.
Other several angles, mainly depends on the environment in which you will use the high-voltage switch, temperature, humidity, corrosivity need to be considered, combined with the environment to determine whether there is a more targeted safety and protection function, and if the operating frequency is more frequent, it is also necessary to choose the appropriate one, which is different from the general purpose.
Choose Ceho's Cable Branch Box to help you manage cables efficiently and securely in your complex power, data and communications infrastructure. These products effectively protect connections from environmental hazards, mechanical stress, and unauthorized access, while maintaining systematic wiring, improving reliability, safety, and ease of maintenance.
Confirm that the branch box is completely de-energized and locked.
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All cable connections are tightened to the correct torque specification or adjusted if not, otherwise overheating may occur.
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Check that each branch is installed with the correct fuse or breaker rating as per system design.
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All unused cable entry points need to be properly sealed with plugs to maintain IP protection, please confirm this.
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Are enclosures and busbars properly grounded?
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Complete, insulation resistance and continuity tests as required by regulations.
| Feature | Options / Specifications |
|---|---|
| Operating Temperature Range | -40°C to +80°C (wider ranges available) |
| Mounting Type | Wall-mounted, Pole-mounted, Ground-mounted (with bracket) |
| Locking Mechanism | Padlockable latch, multi-point locking, cylinder lock |
| Transparent Cover | Optional for visual inspection without opening |
| Internal Layout | DIN-rail mounting, modular components, clear marking areas |
| Standards Compliance | IEC/EN 61439, UL 508A, IEC 60664, RoHS, REACH |
Ceho can provide switchgear, transformers, substations and other electrical equipment, and cables are also important for electrical systems, which are also part of our one-stop product solutions.We strictly follow industry standards, advanced technology, and longer service life.
Ceho offers low, medium and high voltage cables.
Low-voltage cable design is simple, the voltage range is below 0.6/1kV, but although the design is simple, it should have wear resistance, corrosion resistance and flame retardant functions.
The voltage range of medium voltage cables is between 1kV and 35 kV, the insulation and voltage resistance are better, and the outer protection requirements are higher. We will use multi-layer insulation design.
The voltage range of high-voltage cables exceeds 35kV, between 35kV and 220kV.You need to select this for long-distance power transmission.The design of this type of product is more responsible than the previous two, with high insulation performance and more tested voltage resistance.
This also needs to be distinguished according to the voltage type of the power cable, and the general use will definitely cause problems.Ceho's low voltage cables can be used in homes, industrial buildings, shopping malls, office buildings and other places to transmit electricity to various terminal equipment and facilities.
Medium-voltage cables can connect different power equipment, and they are often seen in power transmission applications between urban distribution networks, industrial facilities, and substations.
High voltage cables mentioned above, ultra-high voltage transmission lines, long-distance power transmission, need to use such cables.
Ceho Power Technology Group Co., Ltd.
Ceho Electric Power Technology Group Co., Ltd. is a leading high-tech enterprise dedicated to the research, development, manufacturing, and sales of medium and high voltage switchgear and components.
The company's main products cover: medium and high voltage circuit breakers, transformers, distribution switchgear, and integrated systems such as prefabricated substations.
A Manufacturing Partner You Can Trust
Was Established In
Factory Area
Qualification Certificate
Export countries
Commitment To Reliable Products & Service
The company has been deeply engaged in the electrical field for over a decade. With its outstanding product quality and professional technical strength, it provides customized power distribution solutions for global customers.
Our products are exported to overseas markets such as Russia, Vietnam, Indonesia, Malaysia, Ethiopia, Tanzania and Kazakhstan. We have successfully served over ten countries around the world and delivered more than 1,000 projects. With stable and reliable outstanding performance, we have won wide recognition in the international market.
Quality is the primary principle we adhere to in every production process, as it directly determines whether electrical equipment can achieve the best performance and safety guarantee. Our unwavering pursuit of quality is a powerful guarantee for your brand value. For this reason, our management system and products fully comply with international standard certifications such as ISO.
Driven by technology, guided by the market, and committed to meeting customer needs
For inquiries about power transformer, box-type substation, switchgear or price list, please leave your email to us and we will be in touch within 24 hours.
Applicable scenarios of this report: supporting transformer selection and procurement for overseas factory production lines, overseas photovoltaic/wind power booster stations, overseas commercial buildings, overseas municipal power distribution, and overseas mine equipment.
As a high-tech manufacturer specializing in medium & high voltage power distribution equipment, CEHO POWER TECHNOLOGY GROUP CO.,LTD. (CEHO) launches two core product lines: oil-immersed transformers and resin cast dry-type transformers. Rated capacity ranges from 30kVA to 20000kVA at 10kV/35kV, complying with GB & IEC 60076 standards. CEHO delivers reliable power solutions for solar & wind farms, municipal grids, industrial parks, commercial buildings and data centers.
Ongoing conflicts and infrastructure damage have created an urgent demand for reliable power equipment across the Middle East. As a core component of grid repair and reconstruction, transformers are in short supply for substations, hospitals, oilfields, and residential areas. This article introduces CEHO transformers specially designed for the Middle East’s high-temperature, dusty, and unstable grid environment. We explain why our transformers are widely used in emergency restoration and large-scale reconstruction projects, and how they help you ensure stable power supply with fast delivery and strong durability. If you are sourcing transformers for Middle East projects, this guide will help you choose the right product efficiently.
Ongoing conflicts and infrastructure damage have created an urgent demand for reliable power equipment across the Middle East. As a core component of grid repair and reconstruction, transformers are in short supply for substations, hospitals, oilfields, and residential areas. This article introduces CEHO transformers specially designed for the Middle East’s high-temperature, dusty, and unstable grid environment. We explain why our transformers are widely used in emergency restoration and large-scale reconstruction projects, and how they help you ensure stable power supply with fast delivery and strong durability. If you are sourcing transformers for Middle East projects, this guide will help you choose the right product efficiently.
CEHO describes the impact of core quality on power transformers.
In modern power systems, there is a type of equipment that is indispensable like an "energy hub" - it connects the power generation end and the power consumption end, and through precise electromagnetic induction, it realizes the conversion of voltage levels, ensuring that power loss is reduced during long-distance transmission, while meeting the diverse power demands of industrial production and residents' lives.
In modern power systems, box-type substations, as an integrated and modular power supply device, are gradually replacing traditional brick-and-mortar substations with their unique advantages and have become one of the core equipment for urban power grid upgrades, power supply in industrial parks, and supporting new energy projects.
In modern power systems, transformers are like "energy converters", shouldering the crucial mission of altering voltage and ensuring efficient power transmission.
Today, when urban distribution networks are sinking deeply into "load centers", power distribution equipment is no longer just a silent iron cabinet hiding in a suburban substation. High-rise building basements, subway tunnels, hospital emergency buildings, and chemical workshops—these places that place stringent requirements on fire protection, environmental protection, and reliability are redefining the technical orientation of 10kV distribution transformers. SG(B)10-10KV environmentally friendly dry-type transformer is a typical representative of this trend.
As the core hub of the power system, the stable operation of transformers is directly related to the security of the power grid and the reliability of power supply. However, in actual operation, due to factors such as seasonal power peaks, unexpected load growth, equipment aging, etc., transformer overload operation occurs from time to time. This article will start from the harmful mechanism of overload operation, combine it with actual operation and maintenance experience, analyze its potential risks in detail, and introduce several practical load real-time monitoring methods to provide reference for power operation and maintenance personnel.
In the context of the "double carbon" goal and the construction of new power systems, oil-immersed transformers are being upgraded from traditional voltage conversion equipment to core nodes for power grid energy conservation, consumption reduction, new energy consumption and safe power supply. Its green development is not a single indicator optimization, but a system reconstruction of insulation media, body loss, intelligent operation and maintenance, and full life cycle management.
