Class of insulation

03/06/2011 by 6 Comments

The main component for electric motor is a stator.What is stator?Basically stators are wound with insulated windings made from cooper wire.The insulation  materials for winding of stator such as polyester, poly vinyl formal,polyurethane etc.

The main purpose of insulation is to protect the windings in the slots of the stator lamination and layer between winding coils.The insulation class is durability factor depend on whole of insulation condition.

According from IEEE regulation,The classification of insulation electric motor have a deference rating for maximum temperature that insulation winding can operate.We can see the insulation class at  motor nameplate.Please refer the table below for insulation class rating temperature. read more

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Tips for storage electric motor

02/06/2011 by 5 Comments

Some people do not concern about the correct method to storage the electric motor.This matter look like simple and easy but if we not take serious action,it can cause serious damage and involve high cost for repairing when electric motor defect due to not proper storage method.

I hope my post this time can make all of you some clear picture or idea how to storage the electric motor with proper method when it not use for a long period or for spare item.

When electric motors are not in operation,we must ensure several precaution for maintain electric motor in good condition and best performance without any defect.Here i want share some tips that we must consider for electric motor storage condition. read more

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How to install water pump completed with alignment?

31/05/2011 by 4 Comments

On my last post,i already showed my video about how to install soft gland packing seal for water pump.This time i want share some information on my video how to install water pump complete with alignment.

This is common technique for maintenance person to install back the water pump to electric motor.To operated water pump,we need connected with electric motor using coupling.But it is not easy as we thinks if not do it with the correct technique.

If motor coupling and water pump not parallel to each other or not in correct alignment,it can cause bearing damage and more serious it can cause motor winding defect or water pump impeller jammed. read more

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Measurement of insulation resistance

30/05/2011 by 9 Comments

This measurement important to determine the winding condition for electric motor,electric cables,electrical installation,transformer,circuit breaker,heater and electrical equipment.

From the data of insulation resistance,we can make a perfect and clear decision either the electrical equipment in good condition or not.

The insulation resistance testing also can avoid serious damage,fire or electric shock to public and personal.It also can protect and pro long the life span for electrical equipment.We can detect any abnormal condition earlier and rectify quickly and avoid major damage. read more

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How to replaced soft gland packing seal?

28/05/2011 by 1 Comment

Normally sealed for rotating shaft have a 2 methods.It is a mechanical seal and soft gland packing.Soft gland packing is a conventional shaft seal for water pump and rotating equipment system.

The main purpose is for prevent water leaking through the shaft during rotating process.It also provide a seal to create compression to push the water through the propeller and pump out the water.

The advantage of soft gland packing seal such as easy to install,low friction,no wear on shaft or sleeve,long life span,flexible with shaft and low maintenance.This time i want share my experience how to replaced a soft gland packing seal.

For more detail technique for replacement works,please watch my video below.Please use the proper tools and take a necessary precaution about hazard and the important is SAFETY FIRST :-

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Electrical motor components

02/05/2011 by 2 Comments

Electrical motor is a common used in industrial for many application.This time i want share the basic knowledge for electric motor.Before we go further about how to troubleshooting,repairing or installing,firstly we must know roughly about the electrical motor component.

For electrical person,electric motor components basic knowledge should familiar because we can easily understand operation and troubleshooting for electric motor.

We must know all electrical motor components function before we perform any task for electrical motor.This is very important information to make our jobs more easy and smooth.Below are several important for electrical motor components. read more

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Terminal connection for induction motor

09/04/2011 by 28 Comments

When we install a new electric motor for our application,we need to determine the voltage of power supply.Why it so important when we dealing with electric motor?

Ok..electric motor manufacture design their product can suit with several value of power supply around the world.It made the motor can used at any countries without worried about their power supply value.

The value of voltage for all country’s around the world have variant such as 200 VAC,220 VAC,415 VAC or 440 VAC  for 3 phase.That why some motor manufacture design their motor can operated with 2 types of voltage.So it available for use to any country around the world. read more

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