Electric Motor Specifications

25/07/2015 by Leave a Comment

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

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Types Of Motor Enclosures

08/08/2012 by 1 Comment

The main purpose of motor enclosure is to provides protection from environment  impacts such as rain,corrosive,rusty and many more in which motor installed.

This protection can make motor more life span and can running in suitable condition.It also provide a types of cooling system for a motor depend on their types of enclosure.

Before we select a motor enclosures for our application,please review about location,types of environment impact and ambient temperature to avoid any mistaken. read more

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Motor loads calculation

24/07/2012 by 18 Comments

On my last post,i discussed about why we need to determine motor loads and efficiency.So for this post i want to share how to get the motor load value using simple calculation electrical formula.

Before we go further,i want to explain about Power.What is meaning of Power?Of course this term is significant with our discussion topic.Power is rated of energy in electrical circuit.

It is combination from Amperage and Voltage value.Basic formula for Power is P (watt) =I(ampere)  x V (volt).Power also measured in Horsepower (hp) unit.For common conversion from electrical Horsepower to Watt is 1hp = 746 watt. read more

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Determining electric motor load and efficiency

21/07/2012 by 1 Comment

As we known,the electric motor is the one of important equipment to drive the operation smoothly from beginning to end of product.

Electricity cost normally around 60% came from electric motor running.It become more worth if installed motors are oversized,low efficiency,under design,poor maintenance or mismatched.

So to know the actual motor performance, we need to determine electric motor load and their efficiency to eliminated all problems that can cause the high electricity cost and breakdown.

We need to collected several important data from our electric motor to made comparison and analysis about load and efficiency.

read more

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Measuaring motor insulation using HI POT tester

28/01/2012 by 1 Comment

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

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Star Delta Circuit Diagram

18/01/2012 by 41 Comments

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

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How to protect from surge voltage?

03/11/2011 by 4 Comments

Each year many electrical equipment’s defected due to surge voltage from natural disaster like lightning or supply error.It very costly to replaced it back to normal system.

Theoretically single lightning strike produce 20,000 to 40,000 Ampere and about 200 Mega volts (MV) .It enough to generated a temperature about 4 times hotter than the surface of the sun.

In the market,some of surge protectors are designed to cut out  if a surge value exceeds 60,000 ampere to protected the sensitive equipment from defected. read more

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