Classification instructions for high-voltage transformers
High voltage transformers are classified according to filling materials: Oil type transformer: internally filled with insulating oil Dry type transformer: filled with epoxy resin internally Voltage transformer can be divided into electromagnetic induction type and capacitive voltage divider type accor
Machine tool control transformer
Control transformers are mainly suitable for circuits with AC 50Hz (or 60Hz), voltage 1000V and below, and can operate continuously for a long time under rated load. Usually used as a control lighting and indicator light power supply for electrical appliances in machine tools and mechanical equipment. The control transformer is a small dry type transformer. Commonly used as a local lighting power supply, signal light or indicator light power supply, and as a control
German customers come to our factory for inspection
On June 29th, a German customer visited the Henan New Electric Power Transformer Factory for inspection and ordering. The German customer highly acknowledges and appreciates the comprehensive management level, enterprise scale, and product technology research and development of our factory. After this inspection, we have reached a preliminary order intention for the oil immersed power transformer and look forward to further cooperation with the New Electric
French customers consider power transformers
On May 24th, the New Electric Power factory welcomed a Nigerian customer to visit, inspect, and inspect our three-phase separator and heat exchanger. This visit and inspection marks another important breakthrough in our business in the international market. As a leading transformer manufacturer, New Electric Power has always been committed to providing high-quality products and professional solutions. Our oil immersed and dry type transformers have a high re
Special current transformer for ring network cabinet
Open current transformer is suitable for current measurement and microcomputer protection of power supply equipment below 35KV and 10KV in AC power system. This current transformer has the characteristics of small size, light weight, openable and easy installation. In the network switch cabinet, it is directly stuck on the connected incoming and outgoing cables during installation, which is simple and fast. It has been widely used in compact
Basic structure and working principle of transformer oil level gauge
Basic structure of oil level gauge: The oil level gauge is composed of a float, connecting rod, magnetic steel, gauge base, dial, pointer, glass cover, pressure ring, etc. (as shown in the attached diagram of oil level gauge structure). Working principle: When the oil level in the conservator (oil conservator) increases or decreases due to environmental temperature, load size, and other factors, the float of the oil level gauge synchronously increases or decreases w
Green and energy-saving transformers exported to Brazil
On May 2, 2023, at TNNPI's production site, the new dry-type transformer was successfully taken offline and is about to be exported to Brazil. The transformer has excellent energy-saving, maintenance free, fire and explosion-proof performance, and is suitable for the metallurgical industry. Our company is a key "little giant" enterprise specializing in precision and innovation in our province. In recent years, we have successfully developed a series of
Difference between isolation transformer and ordinary transformer
The primary task of ordinary transformer (including non isolation transformer) is to change the voltage, which is divided into step-down transformer and step-up transformer. The turns of the original and secondary coils are not equal. Isolation is not its main task, and some transformers do not have isolation between the primary and secondary sides, such as autotransformers. The primary task of isolation transformer is to electrically insulate the primary and second
High voltage transformer is a type of transformer suitable for converting large voltage into small voltage or large current into small current in 1kV to 220kV power systems for measurement, protection, and use. It is generally divided into 3kV, 6kV, 10kV, 35kV, 66kV, 110kV, and 220kV. The 24kV system is currently being tested in Jiangsu region. Among them, 10kV and 220kV are the most widely used. The secondary input is mostly 200V or 100V, 5A or 1A.
How many kilowatt motors can a 200KVA transformer carry?
1. KVA is reactive power, kW is active power, and the coefficient in the middle is the power factor. 2. For electric motors, the power factor can be calculated as 0.9, which is 180kW motor. 3. The actual usage situation may be more complex, as multiple motors smaller than 180kW are commonly used,
How many kilowatt motors can a 200KVA transformer carry?
1. KVA is reactive power, kW is active power, and the coefficient in the middle is the power factor. 2. For electric motors, the power factor can be calculated as 0.9, which is 180kW motor. 3. The actual usage situation may be more complex, as multiple motors smaller than 180kW are commonly used,
Insulating porcelain bushing for oil immersed transformers
Transformer bushing is an insulation bushing that leads the high and low voltage leads inside the transformer to the outside of the oil tank. It not only serves as insulation for the leads to the ground, but also serves as a fixed lead. Transformer bushing is one of the current carrying components of the transformer. During transformer operation, it passes through the load current for a long time, and when a short circuit occurs outside the transformer, it passes through the short-circuit current. Therefore, there are the followin
Sulfur hexafluoride outdoor ring network cabinet
Sulfur hexafluoride outdoor ring network cabinet is used in AC 50Hz, 12kV power systems as the ring network power supply for distribution lines, radial power supply, and load redistribution. Usage conditions 1. The altitude shall not exceed 1000m. 2. The ambient temperature is -25 ℃~+40 ℃.
Functions of 3 phase isolation transformer
Functions of isolation transformer: 1. Electrical safety isolation 2. Equipped with filtering and anti-interference function 3. It can effectively suppress the interference caused by high-order harmonics and lightning electromagnetic pulses introduced from the power line on the system
Safety technical requirements for outdoor floor mounted distribution transformers
(1)The foundation of the floor mounted transformer should be 0.2m above the ground. If in waterlogged areas, drainage ditches should be set around the transformer; A brick and stone wall should be set around the transformer, with a height of no less than 1.8m. The door of the wall should be made of refractory material and designed on the low-voltage side of the transformer. The door should open outward and be locked on the door. Bamboo and wood fences should not be used.
Principles for selecting power transformers
1. The transformer capacity should be selected based on the calculated load, and the long-term load rate of the transformer should not exceed 85%. 2. The distribution transformer in the power supply and distribution system should be selected from the Dyn11 connection group. 3. The number of transformers should be selected based on load characteristics and economic operation. When one of the following conditions is met, it is advisable to install two or more transformers: 1) Ther
single phase pole mounted distribution transformer
The single-phase column mounted distribution transformers produced by New Electric Power Company are divided into two types: ordinary type and fully self-protection type, with two types of iron cores: silicon steel sheet and amorphous alloy. Ordinary type: the transformer oil tank is of cylindrical sealed structure. All transformers have grounding devices and hooks, American standard installation hooks, and pressure relief valves. One (or two) high-voltage b
Oil immersed transformer main and auxiliary accessories
The main accessories of transformers include the following: (1) Iron core: serves as a pathway for magnetic field lines and also serves as a support for the winding. (2) Winding: As a path for current. (3) Oil tank: As the outer shell of the transformer, the oil tank is filled with oil, playing a role in heat dissipation and
Brief Introduction of Amorphous metal transformer
Oil immersed amorphous alloy transformer is a new type of energy-saving transformer with amorphous alloy strip as the core material. Its no-load loss is reduced by more than 75% compared to the S9 type oil immersed silicon steel core transformer with the same capacity, and by more than 65% compared to S11. The energy-saving effect is significant. This type of transformer can replace silicon steel core transformers and is widely used in outdoor distribution systems. The large-scale operation of this product can achieve good energy-saving
pressure-type electric contact thermometer
The pressure-type electric contact thermometer is suitable for measuring the temperature of liquid, gas and steam that do not have a negative effect on copper and copper alloys, and can send out an electrical signal when the working temperature reaches or exceeds a given value. The thermometer can also be used as a circuit contact switch in a temperature regulation system. The anti-corrosion type is made of all stainless steel, suitable for neutral corrosion, liquid
Introduction to Transformer Accessories Dehumidifier
Purpose of moisture absorber: Transformer moisture absorbers, also known as dehumidifiers, are used to remove and dry debris and moisture from the air of the oil conservator to ensure the insulation strength of the transformer oil. Moisture absorbers can be divided into white silicone moisture absorbers and color changing silicone moisture absorbers according to silica gel; According to function, it can be divided into ordinary (or single suction) h
Three-phase to single-phase transformer
A three-phase to single-phase transformer is a transformer that converts a three-phase input into a single-phase output. The input current of one phase of the transformer is twice that of the other phase. It can reduce the single-phase 220V load current by 40%; The single-phase 380V load current has the same one phase current, while the other two phases are 50% of the one phase current. It is more expensive than isolation transformers. It is widely used in industrial and mining enterprises in specific load situations to solve the
Operation sequence of high-voltage disconnector
1. When operating the high-voltage disconnector, the high-voltage disconnector manufacturer should first check the circuit breaker of the corresponding circuit to ensure the true opening position, which can prevent pulling and closing the disconnector under load. 2. During line shutdown and power transmission, disconnect switches should be pulled and closed in sequence. During power failure ope
Why is the high voltage wire not as insulated as the ordinary wire?
Because it is unnecessary to wrap the insulation layer for high voltage, and it also wastes money. The transmission voltage of high-voltage transmission lines is mostly more than 10000 volts, and the voltage of some lines is as high as 100000 volts and 500000 volts. If such lines are to be insulated, the insulation thickness of ordinary wires is far from enough. The voltage of the electric wire in our home is only 220V. As long as we wrap it with a thin insulating l
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