Design of Magnetic Motor Starters and Auto-Breakers (MCCB)


Design of Magnetic Motor Starters and Auto -Breakers(MCCB)



Fig.1



Fig.2
   
     For Design of Magnetic Motor Starters and Auto - Breakers one can select the voltage ,Phase and frequency from fig1 and pick the different values from fig2 (Column-wise) according to the HP or KW of any motor

Comments

Post a Comment

Popular posts from this blog

What are delta connections,current voltage anf power in delta connections,summery of delta connection,uses/advantages of delta connection

Image
Delta Connection            A delta connection is a connection used in a three phase electrical system in which three elements in series form a triangle ,the supply being input and output at the three junctions.            It is also known as 3 phase 3 wire system.It is preferably used in AC transmission.It is denoted by  Δ . The other name of delta connection is Mesh connection .               In case of Delta connection all the three coils are connected in series to form a close circuit.From each junction we take out one wire and out-going current from each junction assumed to be positive.In case of delta connection it look like a short circuit but in case of balance load the sum of all voltage should be zero.              In the following fig. all values Current,Voltages and power for 3 phase delta connection can be shown. fig ...
Read more

What is DC Motor ,Working of DC Motor,Types of Dc Motor,Speed Regulation of Dc Motor, Characteristics & Applications of Shunt Motor,Characteristics & Application of Series Motor,Advantages & Disadvantages of DC Motor,Losses fo DC Motor,Factors Controlling Speed of DC Motor.

Image
Working Principle of DC Motor            An electrical motor is a machine which converts electrical energy into mechanical energy( There is no basic difference between DC generator and a DC motor.The DC motor can be used as a DC generator).             The working principle of DC motor is based on ,when a current carrying conductor is placed in a magnetic field it experiences a mechanical force whose direction is given by the Fleming's left hand rule and its magnitude is F=BIl newton. Working of DC Motor       Fig. Is shown a portion of the muiltipolar DC motor. fig. When the field magnets are exited and we supplied current from the main supply to the armature conductors.\the the armature experience a force which tries to rotate it.Armature conductors under N-pole are assumed to carry current downwards ant the conductors under S-pole carries current upwards.By using Fleming's left hand rule we ca...
Read more

What is full-wave Bridge Rectifier?,Comparision b/w FW-Bridge Rectifier with FW-Center tapped transformer,Working principle of FW-bridge Rectifier ,Comparison of all types of rectifiers,FW-bridge rectifier applications.

Image
Full-Wave Bridge Rectifier                      A Full-Wave Bridge Rectifier is a circuit arrangement which makes use of both half cycles of input alternating current (AC) and converts them to direct current (DC) .In full-wave bridge rectifier we used four diode in the form of a bridge as shown in the diagram below.  Comparison of FW-Bridge rectifier With Center Tapped Transformer                      The FW-bridge rectifier uses four diodes instead of two but the it eliminated the need of a center-tapped transformer.The PIV-rating of the diode used in FW- Bridge rectifier should be better than Vmax rather than 2Vmax if we compared it with FW-rectifier with a center-tapped transformer.This means that the diodes used in FW-bridge rectifiers are cheap as diodes of high PIV-rating are always more expensive used in FW-Rectifier with center tapped transformer ,this is b...
Read more