For a given excitation,if speed of an A.C. generator is reduced then the output voltage would reduce also.In practice,this reduction in output voltage is sensed by the AVR ( Automatic voltage regulator ) which increases the excitation current to compensate. However,the field forcing capabilities of the AVR which are necessary to maintain output voltage during [...]
When generators are operated in parallel condition,it necessary to be arrange for both real power ( kW ) and reactive load ( kVar ) sharing in proportion to their standard rating.Real load output from generator determined by torque applied to the shaft and this can only be controlled by controlling the prime mover driving the [...]
Now in automation industry,the common practice for programming the PLC is using a desktop or laptop.It easy to handle and more comfortable when perform the design or troubleshooting job. PLC manufacture also in advance to produce a user friendly PLC software in market today.It made our programming task more easy and can get the best [...]
This part is important to us when suddenly our electricity cost is higher than normal usage.We can determine the figure from electrical supplier is correct or not We also can calculated a electricity cost for estimated our new electrical design such as install new motor,compressor,furnace or others equipment.With this calculation we can know the estimated [...]
When install a motor using capacitor for starting or running methods,we must sizing the rated of capacitor suitable with motor to get correct starting torque and avoid winding from overheating and can cause a damage. This is basically a question of motor design.There is no straightforward regular relationship between capacitance and the motor size in [...]
Application of start and run capacitor for single phase motor. Why we applied a capacitor for single phase induction motor?The reason is to improve performance of motor by generate the rotating field.Design for this motor have a two ( 2 ) stator winding,and one of it is the auxiliary and is connected by a suitable [...]
Firstly let me describe about what is capacitor?This device is very common used in electronic and electric application.The main function is to stored and release electricity charge. It charge and release depend on frequency ( Hz ) of our power supply.Normally around 50 until 60 times per second in alternating current system. The construction of [...]
