Other Products / Services #651576

Method of operationsservo controlled voltage stabilizers maintain accurate output by feedback controllingm by servo motor. the input line is connected in series with the secondary winding of a buck boost transformer. The secondary will get additive or subtract voltage induced from its primary. When the input is low, the secondary will have additive voltage to give boosted output and vice versa. the primary of this buck boost transformer is connected to the fixed tap and variable point of the variable transformer which is connected across the input supply. the position of the variable point with respect to the fixed tap point determines the amount of primary voltage and hence the secondary voltage of the transformer which becomes additive or subtract. Thus the input is boosted or bucked by the series connected secondary wiring corresponding to the position of the variable point of the variable transformer. the variable point is driven by a servo motor in the forward or reverse directions. the forward or reverse signals is given through a controller circuit which is energized by an output sensing transformer. the controller circuit will be giving forward or reverse signals to the motor till the ouiput is corrected to the required value. as sensed by the sensing transformer if the variation in the input voltage goes beyond the specified range. the brush arm of the variable transformer will be driven to either of the ends, thus unable to correct the output further. This however is likely to cause damage to the variacs, motor etc. To avoid the same limit switches are provided at both the ends of the variacs winding so that the brush arm on reaching the end will automatically cut off the supply to the motor and prevent further movement. if the variation in the input voltage revives to within the specified range, the supply to the motor comes into function automatically to set the output voltage to its specified level also when the limit

Input: 230v+- 10%, 50hz, or 440voutput type: variable single, dual, fixed, multi outputoutput voltage: from 0 volt to different rangesoutput current : from 0 amps to different rangescine regulation: better than 0.05% for the input variation +- 10% sabtron dc power supply is designed as a source for use in laboratories, industries and field testing with compact size, it provides dc output voltages for analog and digital testing.

Precautions &safety ac power supplies and dc power outputs are sources of high voltage. Improper or careless use could result in fatal electrical shock. Observe common sense safety precautions when using this dc variable power supplyinput power these instruments are intended for use with 240v, 5060hz phase to neutral line voltage. But dont use this power supply in case of above 10% line voltage & variation in the input voltage will reflect the output voltage. ventilation the provision of louvered holes in the enclosure to provide cooling. Do not block these holes or locate this device near heat sources. Excessive temperature buildup inside the unit can cause failure and a potential hazard. maximum output voltage the output voltage of the ac power supply is adjustable from 0 to 300 vdc. It should be noted that this is higher than the maximum recommended input voltage of most electronic devices. The voltage setting of this unit should not exceed the device manufacturer ratings as potential damage could occur. Most ac powered equipment has a maximum input rating of 240vac. If unsure of the maximum ac voltage rating, do not exceed 240vac. maximum output current never exceed the maximum output current of this unit. Excessive current loads will damage the variable auto transformer and electronic circuit.We provide filter circuit for reducing ripple current up to 2%

We are offering variable transformer box, our ranges of transformers are from 2 amps to 300 amps in single coil and above that with gang coil through the balancing coil. We make up to 60 amps both air-cooled and oil cooled models whereas above 60 amps in oil cooled models only. Moreover, as per clients specifications, we also offer double layer winding capacity up to 5 kva especially for the manufactures of servo controlled stabilizers.

We offer current injection kits which have all features in primary side variable ac voltage and secondary variable with low voltage in higher current capacity. the current injection kit produces less voltage in large current and it is primary controlled by variable transformer and secondary with step down transformer, which is used to reduce the line voltage and increase the current capacity. We also provide voltmeter, ammeter and mcb or fuse protection in primary side.

Controls and panel layout 1. Control a. The power supply is controlled by motorized ac variable transformer with the capacity of 50 amps single phase and fine tuning controlled by 2 amps single phase motorized variable transformerb. Mcb protected in input side c. We provide zero start facility to the power supply for protecting middle operationd. Input with 8mm epoxy bushing and output with copper buzbar for each 2500 amps e. The maximum output current is directly proportional to the supply voltage. f. we provide push button switche for, switch on 2500a, cut off , increase and decrease switches for direct and fine tuning g. To select output current for 2500, 1250 amps we provide buz-bar terminations in the back side of the enclosure and link buz-bar. The direction for linking we provide drawing in the top of the enclosure operational proceedure ensure that the variable power supply is connected to the proper 240vac, 50hz single phase power source. The wall outlet must be a two-wire neutral type, with a good earth ground.Always the cable entry panel should be closed after the connection of input and output cable protect from the direct shock connect the ac power cable with sufficient power source to the input epoxy bush, it should be fully tightened otherwise it may cause to heat and fire switch on the input mcb and confirm the main indicator lamp blows, but it should be sure about the voltage is zero position that the zero start is connected. press the switch on push button for loading the current. And gradually increase the voltage with push button provides for increase and decrease the voltage. Adjust the output current to the desired level and apply the fine tuning push button to get the exact output current