Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Uninterruptable power Supply
An uninterruptible power supply provides emergency power when utility power is not available. It maintains the supply under all conditions. A UPS is used to provide good quality power to the load when power fails, regulate the load voltage when supply voltage fluctuates provide constant voltage and constant frequency supply to the load suppress the voltage spikes and minimize the radio frequency interferences and electromagnetic interferences.
Here the rectifier is used to convert AC into DC. By using the batter bank DC can be stored to supply continuous power when main supply fails. Inverter is used to convert DC into AC. The DC is fed into inverter either from rectifier when main supply is ON or from battery bank when it is OFF a ripple free AC can be obtained by using filter circuit.
The general categories of UPS systems are on line , off line and line interactive.
Rise Time (t r ) During rise time voltage falls from 90% V a to 10% where V a where V a is the initial anode voltage. In terms of current time taken by anode curre
wein bridge oscill0scope
First Quadrant or Class A chopper A chopper two mode operation of class A chopper can be explained as follow.
Q. Show DC Generator Characteristics? Figure shows schematic diagrams of field-circuit connections for dc machines without including commutating pole or compensating windings.
Time constant Time constant, defines as time for current achieve maximum (IM) if this maintain the early promotion rate current.
The block diagram for a 3-bit ripple counter is shown in Figure (a). Obtain a state table for the number of pulses N = 0 to 8, and draw a state diagram to explain its operation.
In real life, transformers have losses which cause their behaviour to deviate from the ideal. Explain the reasons for this non-ideal behaviour
how to ca;lculte star point potential
Circuit with capacitive load Capacitors which obey the relationship of equation are linear capacitors, since the potential difference among the conductive surfaces is linearly
In practice, it is usually better to wind the field coils on the rotor and supply the field current to them via slip rings. As the rotor turns, the changing magnetic field expe
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd