SAR Series Fully Automatic A.C.Voltage Regulator

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10000pcs pc/month

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Product Description:

1.Application
These special products of SAR series Voltage Regulator have advanced equipment, abundant technology, reliable quality and distinguished credit. SAR series are designed at JS3717-84 request, these products conform to fully automatic control of integrated circuit. They are of quick speed, good reliable of sensitive action, convenient use and assure the stale resuit. They are suitable for families, schools, enterprises, hotels and diets etc., where need a stable civil power. They can make the illumination lamp, TV set, air-conditioner, refrigerator, computer SAR-2000VA and copy machine etc. work at a normal condition and have a long using time.

2. Technical specification

FrequencyRegulating TimeTemperature RiseWithstand VoltageLow Voltage ProtectionOver Voltage Protection
50-60HzLess Than 0.5<60oCAccord With Ministry Issued StandardOutput 100V/160VOutput 270V/260V
ModelRangeInput Civil Power Voltage(V)Output Precision of Stabling Voltage

Current160-260220V±5%
0.5KVA To 5KVAOver-Low Voltage130-270220V±8%
Special Over-Low Voltage100-270220V±10%
High Precision of Stabling Voltage160-270220V±3%


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Q:50KVA transformer each phase current maximum band
Hello there: - ★ 1, three-phase transformer rated output current = transformer rated capacity ÷ (voltage × follower 3). This current is apparent current, marked on the transformer nameplate. - ★ 2,50KVA transformer, each rated output current = 50KVA ÷ (400V × 1.732), equal to about 72A. Note that the secondary voltage of the power transformer is 400V instead of 380V. - ★ 3,50 KVA transformer rated current per phase is about 72A, "the maximum energy can be large" according to the ambient temperature, cooling conditions may be. Generally below the rated current, can be long-term operation.
Q:What is the difference between the inverter and the transformer?
★ 1, [inverter]: inverter can change the frequency, [also change the voltage accordingly]. Because, inductive (such as motor) load, in the frequency down, the sense of resistance is also reduced, in order to prevent the current exceeds the rated value, must also reduce the voltage! In the last century just introduced, for the FM, voltage regulator, speed control device is known as the "three V technology" is the reason. - ★ 2, [Transformer]: As the name suggests, the transformer is to change the voltage of the device. Transformers are typically used at specific frequencies (eg, frequency, or high frequency). As the voltage used to change, the frequency is constant, which is its salient features.
Q:Can the transformer oil be used as a lubricant?
Can not! Two kinds of oil indicators out of the thousands of miles out! According to you say with the line also do more money to prepare for the machine! Oh! Looking for compressor oil, general 13 # compressor oil and 19 # Compressor oil! 13 with dilute words on the 19 # must be no problem!
Q:Know the rated capacity of the transformer, how to calculate its rated current?
E.g: 10KV / 0.4KV, 100KVA transformer, low voltage rated current: I = 100 / (1.732 * 0.4) = 144.34A
Q:Why the provisions of the maximum temperature of the provisions of the transformer 65 °?
Most big oil temperature increased load, the transformer internal fault, there is lack of oil performance security risks. So we do need to limit oil temperature and protection tripping. Small capacity (630KVA less and outdoor) often do not have the oil temperature protection. I have the original table 800KVA overload (secondary current 1500A), top oil temperature to over 90 degrees ......
Q:Why 21 lighting transformers must use double-winding safety isolating transformers,
Autotransformer A set of coils, which have a tap, can not achieve isolation. Or two sets of coils are attached.
Q:Proteus transformer how to adjust the parameters, the 220V into 14V output.
2, in the Proteus simulation diagram, double-click the transformer symbol, open the transformer parameter settings dialog box, which                 Primary Inductance 1H (set: can be fixed)                 Secondary Inductance 0.00406H (set by press)
Q:What is the maximum current of the 800KVA transformer? What is the current? Is how to calculate, ask you master
This type of capacity of the transformer for the distribution transformer, that is, step-down transformer. Voltage combination to 10 / 0.4 for multi-purpose. Transformer high side current 46.19A, low side current 1154.73A. Rated capacity = 1.732 * rated voltage * rated current
Q:Rectifier and rectifier transformer
1) rectifier transformer is the rectifier device power transformer. Rectifier equipment is characterized by the original input current, and vice president through the rectifier output after the original DC. Converter is rectifier, countercurrent and frequency conversion of the three working methods in general, rectification is one of the most widely used. Transformer used as rectifier power supply is called rectifier transformer. Industrial rectifier DC power supply is mostly by the AC power grid through the rectifier transformer and rectifier equipment and get. The application of rectification change the most chemical industry. Simply talk about the industrial high-power DC power supply. Civil rectifier transformers are commonly referred to as power adapters, transformers, power converters. 2) rectifier (English: rectifier) ​​is the exchange of alternating current into direct current devices, can be used for power supply devices and detect radio signals. Rectifier can be vacuum tube, ignition tube, semiconductor diodes, SCR, mercury arc and so on. Generally do not contain voltage transformers. Refers to a wider range. Basically most of the electronic products are in use. 3) folk often put the ballast as "rectifier", inductance ballast is a core inductance coil, rectifier is a rectifier device.
Q:What is the main purpose of the transformer?
Transformer is an electrical equipment for electrical energy conversion, it can be a voltage, current AC power into the same frequency of another voltage, current AC power. Transformers are used in almost all electronic products, and the principle is simple but different depending on the use of different occasions (different purposes) transformer winding process will be different requirements. Transformer functions are: voltage conversion; impedance conversion; isolation; regulator (magnetic saturation transformer), the transformer commonly used core shape generally E-and C-type core. First, the basic principles of the transformer

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