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Molded Case Circuit Breaker

12/09/2010 by Lemau 4 Comments

What is MCCB ( Molded Case Circuit Breaker ) ?

It is a mechanical device ( BS 4752 ) to be used to connect and disconnect the circuit in normal and abnormal.Current rate for regular MCCB up to 3000 ampere.

It is only available in a 3 pole only, usually for a system that has a high ampere ratings in three ( 3 ) phase systems.For those who have ampere ratings than 400 ampere, the safety interlock system is prepared for security purposes because the current system are high.

There are two ( 2 ) types of MCCB commonly used in industry, it was: –

Filed Under: Circuit Breaker Tagged With: ampere, current, delay, device, feeder, interval, magnetic, mcb, rated, thermal

Alternating Current (AC)

09/09/2010 by Lemau Leave a Comment

What is an alternating current?

Alternating current (ac) is changing the current flow.Changes in the flow of current in ac circuits because if the changes the polarity of the alternating voltage source alternately.

Current value will increase from zero to a maximum in the positive direction and then dropped to zero. Next, the current will be reduced to a maximum in the negative direction. Then, the current back up to zero.

Filed Under: Theory Tagged With: AC, amature, basic, current, dc, flaming, generator, hand, induction, left, peak, rms, rules, value

Direct Current ( DC )

09/09/2010 by Lemau Leave a Comment

What is a direct current (DC) ?

Direct current (DC) is an electric current that flows continuously in one direction only. This is the type of electrical current is supplied if the voltaic cell. As long as the polarity of the voltage at the bases voltaic cell is fixed and does not reverse, the voltaic cell can be referred to as a source of direct voltage

Filed Under: Theory Tagged With: cell, current, direct, paraller, resistance, series, voltage

Protective Device Introduction

30/08/2010 by Lemau Leave a Comment

What is protective device introduction?

Electrical distribution systems are often quite complicated. They cannot be absolutely fail-safe. Circuits are subject to destructive overcurrents. Harsh environments, general deterioration, accidental damage or damage from natural causes, excessive expansion or overloading of the electrical distribution system are factors which contribute to the occurrence of such overcurrent.

Filed Under: Circuit Breaker Tagged With: breaker, circuit, current, device, electrical, overcurrent, overload, trip

What is Electric?

27/08/2010 by Lemau 3 Comments

Electrical definition.

WHAT IS ELECTRIC ? This is a question often asked by people around the world for those who wish to enter the electrical field, they should understand basic electricity.It is very important because electricity can not be seen with the naked eye.we only know about the theory of electricity. in the field of electrical “knowledge is power ” to ensure that we and electrical equipment in a secure and functioning well.We must have a strong basic of electrical..

Ok…here from my simple understanding,Basic of Electric is a electron ( negative charge ) always around a proton (positive charge) and neutron caused by the force of attraction between protons and electrons

Filed Under: Theory Tagged With: basic, current, electric, electron, law, neutron, ohm, resistance, voltage

Molded Case Circuit Breaker

What is MCCB ( Molded Case Circuit Breaker ) ?