Circuit breaker specific features for main switchboard

For circuit breakers specification MUST suitable with installation condition and needed.Main switchboard is the main power supply distribution for factory or building.This unit is a key for entire electrical power supply distribution.

Circuit breaker feed the high volume of voltage for all equipment and machine.It also have a high value of short circuit current due to proximity of low voltage supply and size busbar for conveying the high current.

So we need carefully and detail understanding about circuit breaker before choose the circuit breakers for main switchboard application.This time i want share some information about criteria and specification circuit breaker for main switchboard. read more

Maintenance for low voltage circuit breakers

Low circuit breaker normally operating at 600 volt AC and below.The common used types of  circuit breaker around the world such as molded case circuit breaker (MCCB) and Air circuit breaker ( ACB ).

This low voltage circuit breaker usually used for power distribution and sub power distribution at factory and general industry.It a combination with electrical and mechanical device to protect our electrical system from overload and over current matters.

IEE regulation stated a several condition for maintenance and services for circuit breaker.The main purpose is to make sure this circuit breaker in good condition and can activated when problem happen.It also for safety purpose for equipment and personnel. read more

Routine maintenace tests for circuit breaker

Circuit breaker is the important protection device for our application and electrical power supply system.It can save our equipment or machinery from damage from over current or overload matter.It also can save personal life who involve directly or indirectly with electrical application from electric shock.

How we can know the actual condition and reliability for our circuit breaker? Normally we must perform the routine maintenance tests to determine out circuit breakers are able to perform their basic circuit protective functions and in good condition.

This time i want share information about routine maintenance tests for circuit breaker.Below i listed 5 types of tests to determine and assuring that the circuit breakers are functionally.Please be caution before perform the tests are to be made only on breakers and equipment that are on de-energized mode ( power supply OFF ). read more

Molded case circuit breaker maintenance

The circuit breaker maintenance is very important and it must added in  periodical maintenance schedule.Why it so important?It is because of their importance for routine switching and for equipment protection and person.

Production will stop if circuit breaker fails to operate because of a lack of preventive maintenance.The cost will rise for repairing jobs and it not good for business.We must avoid from this unwanted situation because of not done the circuit breaker maintenance.

The need for maintenance of circuit breakers is often not obvious as circuit breakers may remain idle for long periods of time. Breakers that remain idle for 6 months or more should be made to services to ensure it in proper condition and remove any dust or foreign material on mechanism and contacts. read more

Miniature Circuit Breaker Sizing

When we design or build a electrical installation,we must know how to choose the suitable circuit breaker for the any application that we design.For electrician,this is compulsory knowledge.So here i want share my little knowledge about circuit breaker sizing method.

This calculation for sizing the miniature circuit breaker.For other circuit breaker likes MCCB,ACB,VCB,OCB and etc,it have a additional factor and calculation that we must consider.

For that why i will discuss it in my next post…so this time i want explain the simple way how to sizing the miniature circuit breaker for our application. read more

Residual Current Circuit Breaker

This device is important in electrical wiring installation.It is a life guard device to protect from electric shock.Others circuit breaker only can detect the fault from over current and short circuit but cannot detect the current leakage.

That why RCCB is very important.Only this device can detect the current leakage.The current leakage can cause the injury or dead for human and can lead to fire hazard.When design the distribution panel board,please make sure this device include in our planning to install..it for consumer safety and avoid equipment from damage. read more

Molded Case Circuit Breaker

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: –

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