JJW SJW A.C. Precision Purity Regulated Power Supply

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1. Product Description:

It often happens that the electrical equipment are damaged because of lack of power. The experts of power point out most 80% malfunctions of computer are caused by A.C. power supply directly or indirectly. So as to ensure the safe operation of electrical equipment, the power supply must be improved. Our products fulfill the requirements in such places for his spurious characteristic. Our products are suitable for the following fields: science department, university, corporation, hospital, broadcasting station, communication equipment, traffic system, test equipment and all automatic production equipment.


2. Product Characteristic:

A.C. Precision purity regulated power supply is our new, high characteristic electronic A.C. regulated equipment as KUPA doctor’s theory, combining Asymmetrical Digital Subscriber Loop colander net, which integrates multi-functions such as purity regulation and anti-disturbance. They are of wide range in regulation, fast speed in response, high precision in regulation etc.,to refrain all kinds of noise from power net and disturbance from peak. They are your first choice among of A.C. regulated power supply at present, which are 614 series electronic A.C. regulated power supply and ideal substitution regulated power supply.



Single phase:170-270V Three phases:310-450V

Range of input regulation:

Single phase:185-250V, output:220±5%

Three phases:330-450V, output:380±0.5%

Input frequency:50Hz±5%

Alarm value of output voltage

Single phase:output higher than 242V or lower than 198V

Three phases:output higher than 418V or lower than 342V


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Q:National Standard for Transformer Life
3, this life is in the case of rated operation (rated capacity to run). How much time is the transformer running? So in normal circumstances, this 20 or 30 years is fully able to do. 4, now, how many transformers are life and scrapped? Often the life cycle has not arrived, the transformer is eliminated. The reason is: 1) economic development is too fast, the transformer to increase the capacity, and to replace the transformer. 2) Transformer technology development fast, power transformer almost every 3-5 years out of a new product, the loss is also constantly in the drop. For these reasons, the transformer is less than 20-30 years to be updated. So no one is very concerned about this life. Guidance of the national standard for you - Guidance on the load of oil - immersed power transformers GBT 15164-1994. Transformer machinery industry standard GB / T 17468-1998 "power transformer selection guide" in Article 8 transformer thermal aging rate and life of the "transformer life is generally 20 years."
Q:Three-phase three-winding transformer high-pressure medium-pressure low pressure is what it means
transformer: Transformer is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.
Q:What is the primary side of the transformer
Step-down transformer: primary side of the high-pressure side (primary side) Secondary side refers to the low side (secondary side) Boost transformer: primary side of the low side (primary side) Secondary side refers to the high pressure side (secondary side)
Q:From the variable ratio to determine whether the transformer is boost or buck
For example, 10KV system, the transformer primary winding rated voltage of 10KV and 10,5KV, secondary winding rated voltage of 10.5 and 11KV. 110KV system, the transformer primary winding rated voltage of 110KV, secondary winding rated voltage of 121KV. 220KV system, the transformer primary winding rated voltage of 220KV, secondary winding rated voltage of 242KV. and many more. 110KV is a winding, that is, 110 variable 10.5KV course is the buck variable. Secondary winding for the 121KV, that is, 10.5 variable 121KV course, the pressure has changed.
Q:Transformer voltage ratio and current ratio.
High voltage side voltage / low voltage = low voltage current / high side current = variable ratio
Q:Transformers have any way of cooling
Selection of strong air-cooled cooling mode, when the pump and fan lose power supply, the transformer can not run for a long time. Even if no load can not run for a long time. Therefore, two separate power supplies should be selected for use by the cooler.     When the oil-water cooling method is selected, it can not be operated when the pump cooling water loses power. The power supply should select two independent power supplies.
Q:Transformer how to do no load test
3, through the no-load test can be found in the transformer the following defects: Poor insulation between silicon steel sheets. Between the core, between the pieces of local short circuit burn. Wear the core bolts or tie the strip, the pressure plate, the yoke and other insulation part of the damage, the formation of short circuit. Magnetic circuit in the silicon steel loose, dislocation, air gap is too large. Core multi-point grounding. The coil has turns, inter-layer short circuit or parallel branch turns ranging from ampere-turns and so on. Misuse of high consumption of low quality silicon steel sheet or design calculation is wrong.
Q:Is the transformer a power supply?
In the classification of electrical components, the transformer does not belong to the power supply, belonging to the power conversion element
Q:Transformer secondary side is high pressure or primary side is high pressure
Step-down transformer primary side is high pressure, secondary side is low pressure. The step-up transformer is just the opposite. Step-down transformer reverse use is the step-up transformer.
Q:How is the transformer sorted?
4, according to the winding form points: 1) Double winding transformer: Used to connect two voltage levels in the power system. 2) Three-winding transformer: generally used in power system area substation, connect three voltage levels. 3) Autotransformer: Power system for connecting different voltages. Can also be used as a normal step-up or down transformer. 5, according to the core form points: 1) core transformer: for high voltage power transformers. 2) Amorphous alloy transformer: Amorphous alloy core transformer is a new type of magnetic materials, no-load current drop of about 80%, is the energy-saving effect of the ideal distribution transformer, especially for rural power grids and developing regions such as load rate Lower place. 3) shell transformers: special transformers for high current, such as electric furnace transformers, welding transformers; or for electronic equipment and television, radio and other power transformers.

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