Electric Motor Specifications

As we known,electric motor is an electrical equipment that convert from electrical source to mechanical energy and create rotating force.For Electrician or Electrical Engineer,to choose a right motor specification for installation or equipment is important and it’s critical decision have made.

We must know all about electric motor specifications to suit for our application.All important parameters or specifications  that we need for our application design must suitable with electric motor that we want to install to avoid any damage or failure during operation.

This time I would like to share about Electric Motor Specification that we must understand before we select or purchase new motor for our installation or project.How we can found about electric motor specification? Read More

General Requirement For Circuit Breaker

Circuit protection is a mandatory items that we MUST consider carefully for Electrical Installation project.I will take a fully attention during sizing and follow standard requirement for circuit breaker.

If the circuit protection not function properly, it’s can cause a serious damage to equipment and personnel.On my last post,I had discussed about Circuit Breaker Sizing.

This time I want to share some information about general requirement for circuit breaker that commonly apply for Electrical Installation project.I hope this post can help to have a basic guideline during handle any project of electrical installation. read more

AC motor protection device

As we know,motor protection is one of the important criteria when we involve for AC motor installation,wiring and termination works.Commonly magnetic contactor,fuse, Molded case circuit breaker (MCCB) and overload relays are used for motor control device of induction motor.

In general ideal for motor protection,it have two basic protections always installed for every motor are Over-load protection and Short-circuit protection.For advance protection we can added for protection against unbalanced supply voltages, under voltage, reverse phase, over temperature and stalling etc. read more

High voltage circuit breaker

As we know about circuit breaker is to protect electrical equipment from abnormal condition such as over load current or short circuit.For Low voltage circuit breaker,i already explain on my last post.Please read my post about miniature circuit breaker (MCB),molded case circuit breaker (MCCB) and residual current circuit breaker (RCCB) for more detail information.

For high voltage circuit breaker,the main contact mechanism normally designed with various method to avoid from damage and provide a better quenching around the contacts surface.The main purpose is to extinguishing any arcs formed as faster as possible. read more

Measuaring motor insulation using HI POT tester

When we need to evaluate the motor condition,HI-POT tester or High Potential tester is the common equipment are used.As we know,a multimeter or ohm meter reading only can determine if a motor winding is open or shorted but cannot checked winding insulation condition if shorted with ground or phase.

The main purpose of the Hi Pot tester is to verify the quality and integrity of the electric motor insulation materials used on the armature or stator and also safe to using it without any defect.

Sometime we not take a serious attention or not know about it to checked winding insulation.This step is important to ensure motor can running in good condition without any breakdown. read more

Star Delta Circuit Diagram

The most active post in Electrical Engineering Centre blog is Star delta starter and Star Delta motor connection.I received many comments and request for Star Delta circuit diagram.

So this time i want share my simple star delta circuit diagram completed with power and control line circuit.I hope it can be as basic reference for all electrician about star delta starter diagram.

Star delta starter is a common used in domestic and industry sector to drive variant application such as chiller water pump,machinery,air-compressor and many more equipment. read more

Fault protection

A new terminology for electrical currents now include all faults those between live conductors as well as earth or grounding faults.

If we not design our circuit protection properly followed standard guide,it can cause serious injury or death for human and equipment damage.

Fault current be determined at every relevant point. For small and medium installations with LV utility supplies, this is satisfied by determination of the fault currents at the incoming power supply. read more