Zhejiang Zuoao Technology Co., Ltd is a professional manufacturer of intelligent controller (PCBA) and power transformer products. Our toroidal three-phase power transformer includes toroidal three-phase transformer for knitting machine, etc. Three-phase transformers are passive machines that pass electrical energy between circuits. In the secondary circuit, a magnetic flux induces an electromotive force (emf), thus stepping up (increase) or stepping down (decrease) voltages without altering the frequency.
A three-phase electrical system in used to generate and transmit electric power over long distances for use by offices and industry. Three-phase voltages (and currents) are raised or lowered by means of three phase transformers as the toroidal three-phase power transformer can have its windings connected in various ways.
Compact Design
Three-phase transformers come in a compact design relative to the power handling need. Compared to multiple single-phase transformers, three-phase transformers require less space, simplify installation, and have minimal infrastructure costs.
Efficient
Three-phase transformers handle higher loads more efficiently than other units. Their efficiency reduces energy losses, lowers operating costs, and overall improves system performance.
Balanced Loads
Three-phase power systems provide a balanced load distribution across all phases. They minimize voltage fluctuations and provide stable electricity to operate electrical equipment connected to the network.
Enhance Power Quality
Three-phase transformers improve power quality by reducing harmonic distortion, voltage fluctuations, and phase imbalances. Their robust design construction and efficient performance helped mitigate power quality issues, resulting in smooth operation, fewer disruptions, and increased productivity in industrial, commercial, and residential applications.
Scalability
Three-phase transformers offer scalability for easy expansion or modification of electrical systems as modern requirements change. These transformers can be seamlessly integrated into existing infrastructure without major disruptions while adding new equipment to an industrial facility or expanding a distribution network to accommodate a growing population
Three-phase transformers can be categorized depending on their construction. There are two types of 3-phase transformers: The core-type with primary and secondary windings wound on one core and the shell-type transformer that combines three 1-phase transformers.
Core-type
In core-type three-phase transformers, the core has three limbs within the same plane. Each limb contains primary and secondary windings, and these windings are evenly split among the three limbs. It's not uncommon to hear of high voltage (HV) and low voltage (LV) windings.
As a low voltage winding is easier to insulate, these windings are closer to the core than the higher voltage coils. The latter windings wrap around the former, with insulative material between them. This construction has the windings magnetically linked with one another, with one winding using the other pair of limbs as return paths for its magnetic flux (see Figure 3).
Shell-type
The shell-type 3-phase transformer is three separate 1-phase transformers. The three phases of this transformer have their magnetic fields virtually independent, and this transformer's core has five limbs.
The HV and LV windings exist around the three main limbs. Like the core-type 3-phase device, the low voltage coil is nearest the core. The two outermost limbs serve as the flux's return paths.
Magnetic flux divides in two as the field approaches the yoke. It's common for the outer limbs and the yoke to be half the size of the main limbs. You can decrease the transformer's height by reducing the yoke's size.
Insulation
Insulations serve as a barrier system, separating the windings from the core and the two windings from each other.
Transformer oil
Transformers use a range of insulation materials, including oil, paper, tape, pressboard, and laminated wood.
Tank
The tank safeguards the cores and windings from external environmental factors and also serves as a container for the oil. It is evacuated of air and other substances that could contaminate the oil and affect the dielectric properties of the insulation.
Oil Conservator
Heating the oil causes it to expand, so a separate vessel, called the conservator, is installed alongside the tank.
Cooler
The cooling system collects the hot oil, cools it through air- or water-cooled tubes, and then returns it to the windings and core. The designations for transformer cooling systems, as standardized by IEC, are listed below.
Voltage Regulators
Tap changers are used to adjust the output voltage of a transformer. Under load conditions, the transformer's output voltage may drop, necessitating an adjustment of the voltage ratio by modifying the tapping turns.
Gas Actuated Relay
Also known as the Buchholz relay, this component collects free gas bubbles from the transformer tank. The presence of these gas bubbles can indicate a fault within the transformer.
Thermometers
These devices are used to monitor the oil temperature in the transformer.
Breathers
These devices are used to remove moisture from the air space above the oil level in the conservator, helping to maintain the dryness of the transformer oil.
Pressure Relief Systems
These are safety devices designed to relieve overpressure in the event of oil flashing caused by short circuits.
Applications of Toroidal Three-phase Power Transformer
The three-phase transformer is widely used in the circuit of AC 50 Hz to 60 Hz, voltage below 660 V. The construction of a new grounded middle line in the three-phase transformer can avoid the interference of the power grid and other middle lines by converting the three-line delta connection to the four-wire Yo system.
Since the three-phase transformer can further exempt the high-frequency pulse interference and noise from the internal coupling of the transformer, it is generally used in precision machine tools.
The three-phase transformer products are also widely used in industrial and mining enterprises, textile machinery, printing, packaging, petroleum chemical industry, schools, shopping malls, elevators, post and telecommunication, medical machinery, office equipment, test equipment, industrial automation equipment, household appliances, high-rise buildings, machine tools, the transmission and distribution of the tunnel and the imported equipment to ensure the normal voltage.
Why Choose Us?
Company Experience
As a professional transformer manufacturer, Wanji was founded in 1987 and merged by Zhuoao in 2022. It is a professional manufacturer of intelligent controller (PCBA) and power transformer products.
Company Scale
The company has two production plants, controller division and power division, covering an area of 40,000 square meters, and currently has more than 500 employees.
Production Guarantee
Under ISO9001 and ISO14001 system, the company implements ERP and MES management, and all materials meet RoHS requirements. Our products carry UL/cUL, CE, RoHS, CQC, CSA, ETL, TUV, GS etc.
Production Scale
Power Supply Dept has 12 Toriodal Transformer Production Lines, 10 EI Transformer Production Lines; PCBA Dept has 5 SMT production lines, 8 AI production lines, ICT, FCT, AOI and other automatic testing equipments.
FAQ
We're professional toroidal three-phase power transformer manufacturers and suppliers in China. If you're going to buy high quality toroidal three-phase power transformer, welcome to get more information from our factory. Also, customized service is available.
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