The harmonic and surge current produced by large-capacity non-liner arc furnace has an impact on the safe operation of power system equipment and user 's appliance .

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This paper makes a theoretical calculation on the overvoltage and surge current at switch-on of capacitors for reactive power compensation and simulates the transient voltage and current at switch-on of capacitors for reactive power compensation by using ATP-EMTP software .

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The Research of a Measurement System of Lightning Surge Current

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Restraining of the surge current of capacitors is an important problem in the designing of the TSC are suppression coil .

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According to the mechanism of producing transformer excitation surge current caused by saturation of transformer core the paper put forward a kind of method to discriminate excitation surge current and short-circuit current adopting calculation of equivalent instant excitation inductance average value .

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The latter can be used to prevent the surge current or overload currents from the security zone transmission to the dangerous place to ensure the reliable isolation security .

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The limitations of the traditional methods of limiting surge current such as bigger energy consumption second surge current and function failure are pointed out .

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Soft - starting circuit is designed to overcome the surge current for protecting main switches .

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This paper deeply analyzed surge voltage and surge current in three different dead time when the load is inductive .

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Study on Principle of Exciting Surge Current of UHV Transformer

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Aim To give a measurement system of lightning surge current .

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A new compensative snubber is presented for eliminating the surge current and high frequency parasitic oscillation in rectified circuit of the PWM DC-DC converters .

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This paper analyzes mainly 1 the reason of the surge current the measure for decreasing and the experimental results 2 the method of receiving an abrupt falling down characteristic .

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The restraining surge current of capacitor using transformer

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Forward Voltage Drop Power Loss High Efficiency High Surge Current Capability .

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To protect power switches soft-starting circuit was designed to overcome the surge current .

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The former is composed by parallel diode series limiting resistor and protection fuses which can transfer overload pressure the surge current and overload current to the system GND before fire the dangerous environment .

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In order to eliminate surge current and reduce the input voltage with soft start-up circuit function And through overvoltage and lowvoltage protection to prevent the higher or lower voltage happens .

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Finally a practical calculation example of clamping the voltage of low voltage power line under the surge and effusion surge current by metal oxide varistor is given .

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Through a large number of experiments and the Cadence circuit simulation it verified that the signal SPD had filter discrimination . And under the impulse tests of surge current it can effectively limit the residual voltage within the tolerance which the device can take .

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How to raise the ability of the rectifiers at surge current .

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Analysis of the Telegraph Building 's Surge Current Analysis and countermeasure of an accident of the main transformer forced outage

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The rectifier filter 's circuit is developed through current design and parameters optimization the surge current is quenched and the AC voltage is transferred into high DC voltage to supply the DC / DC converter .

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He found that by charging a capacitor to various voltages and discharging it by short-circuiting it with the fuse he could create a controlled amount of surge current .

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In order to use MOSFET more efficiently and improve the reliability of high frequency pulsed arc welding inverter as well as decrease current surge caused by short-circuit the circuit for arc initiation at low voltage and preventing surge current is designed .

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It features adjustable refrigerating amount small start surge current and short waiting time for continuous start .

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For the problem of transient surge current in charge and discharge switching process further a method is deduced to calculate the limiting reactor .

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The mathematical model of closing loop operation is established and a method for surge current calculation based on Thevenin s equivalent is proposed in this paper .

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Densification and Surge Current Performance of SnO_2-Sb_2O_3 Based Varistor Ceramics

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Elimination of Switching Power Supply Surge Current with Soft-start Circuit

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