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Our Factory
Liaoning Jinli covered 10000m2 area locates in Tongxing Industrial Park in Dandong.The company's total investment is 150 million Yuan, the total numbers of employees are more than 200 people, and the annual output value is more than 70 million Yuan.
Production Equipment
At present, we have 3 units of international advanced level machining center equipment, 30 units of CNC lathes, 50 sets of instrument lathes and ordinary lathes, 10 units of wire cutting machines, 10 units of CNC milling machines and 28 units of stamping and injection molding equipment, all of which lead to enlarge market shares and high quality of production.
Quality Control
According to ISO9001：2008 quality management system inspection process, to ensure product quality meets customer's requirements, the company takes strictly to control every production link from raw material purchasing to completed product outbound, establish a complete laboratory and equip with advanced instruments.
Triangle tap changer is a new type of off load tap selector. this is a new structure of tap switch for triangle oil-immersed transformer.When it comes to the multifaceted field of transformer technology, tap changers are an essential component in the process of managing and improving the level of performance of electrical power systems. Transformer taps and tap changers are mechanisms that allow the transformer to modify its voltage ratio without halting its operation.
We offer the following Product Specifications：
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Max. rated through-current Ir (A) |
200~400 |
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Number of phases |
Single-phase/three-phase |
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Rated frequency (Hz) |
50~60 |
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Rated short-time current (kA) |
Thermal stabilization (3s) |
4 |
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Dynamic stabilization (peak) |
10 |
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Rated step voltage (V) |
1000 |
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Max. operating positions |
10 |
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Rated voltage (kV) |
35 |
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Max. operating voltage (kV) |
42 |
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Applicable transformer connections |
Y |
△ |
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Insulation test voltage 1min (kV) |
To ground |
85 |
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Phase to phase |
45 |
85 |
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First, End |
45 |
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Impulse |
200 |
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Wight(kg) |
Model 200A/150,Model 400A/180 |
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Matching Controller |
Model specifications are shown in the randomized annex |
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Tap changers adjust the connections within the transformer's windings to shift the transformer's voltage ratio. This, in turn, alters the number of turns involved in the voltage transformation process. There are two primary categories of tap changers that are utilized to accomplish this adjustment: on-load tap changers and off-load tap changers.
On-Load Tap Changers
When the transformer is operating and carrying a load, OLTCs adjust the transformer's turn ratio and, consequently, its output voltage. When it comes to situations in which it is vital to maintain a continuous power supply, such as in big industrial facilities or in the general power distribution network, this capability is essential.
Advantages: The most significant advantage of OLTCs is their ability to dynamically respond to changes in load or input voltage without interrupting the power supply. This improves the overall reliability of the power system, ensuring stable voltage levels for consumers.
Applications: Utility networks commonly use OLTCs in their transmission and distribution transformers. Situations requiring continuous operation and frequent changes in demand and supply often utilize these transmission and distribution transformers.
Off-Load Tap Changers
On the other hand, in order to adjust the tap setting on an off-load tap changer, the transformer must first be de-energized, which means it must be unplugged from the electrical network. Although this type of tap changer is less complex and more cost-effective than OLTCs, it faces limitations due to the need to interrupt service for tap changes.
Advantages: Off-load tap changers are simpler, resulting in lower startup costs and fewer maintenance requirements than OLTCs. This is one of the advantageous aspects of these machines. Because adjustments are made without passing current, their operation does not result in the same level of mechanical stress or the risk of electrical arcing.
Applications: Off-load tap changers are ideal for transformers in applications where load conditions are reasonably steady or where temporary disruptions in service for tap changes are acceptable. These applications cover scenarios where tap changes occur. The majority of the time, you can find them in smaller distribution transformers that are used to serve particular residential neighborhoods or industrial operations.
We're professional manufacturers and suppliers specialized in transformer part triangle tap changer. We provide top quality electrical device and power equipment triangle tap changer transformer accessory for customers. Also, customized service is supported.
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