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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How to use a clamp on meter?

15/02/2011 by Leave a Comment

In electrical field,current (ampere) is very important value.It very useful to sizing the circuit breaker,sizing the electric cable,for troubleshooting guideline and many more.Without ampere value,we cannot get the best result for sizing or design.

How we can get a current value?We can use the ammeter or clamp on meter to measure the current value.If you remember in last post AC DIGITAL CLAMP ON METER,ampere must be measure in series circuit to get the value.Now for easy current measurement job,we use a clamp on meter.

I explain detail on my video how to use the clamp on meter.The important thing is we must safety first.Make sure the distance of  live conductor must in safe range.always beware when u perform the measurement job using the clamp on meter. Read More

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Two Point Method

01/02/2011 by Leave a Comment

This is another alternative method for earthing resistance measurement when excellent ground is already available.When we want to perform the measurement for earthing resistance in the compact room or tight area and want to put the two(2) auxiliary rod  may be a problem.

So..to solve this problem,we can use the two point method measurement.This measurement concept is two point into the ground in series technique used to the reading obtained.

The earth surface or other ground must be very low in resistance so that it will be negligible in the final measurement. The lead resistances will also be measured and should be deducted from the final measurement. read more

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Electric motor testing

07/01/2011 by 15 Comments

Electrical motor is the common used in industry all over the world.It very important device to made production smoothly.To ensure the electrical motor condition is good or not,we must know how to testing it.

The electrician or maintenance person must have this skill to determine the electrical motor condition,defected or cannot use anymore.It can save the repair cost and maintenance expenditure.

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The 62% method of earthing measurement

04/10/2010 by 1 Comment

Earthing or Grounding measurement resistance have a several technique and method applicable with suitable situation and location for earthing chamber.

This time i want share about 62% method of earthing measurement that popular used by all electrician around the world to get earthing resistance for Substation,lightning arrestor,generator and others electrical equipment. read more

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Grounding resistance measurement

04/10/2010 by 2 Comments

Grounding or Earthing is the compulsory device for electrical installation.It’s the end point for electrical residue when leakage happen on electrical circuit or installation.

Good grounding can make a different of current balancing in phase during electrical leakage and Residual Current Circuit Breaker will activate if current leakage value over the sensitivity.( 10 mA,100 mA,30 mA,300 mA).

To get a good grounding,we should make sure the resistance is minimum.For the best resistance value is “0 ohm” or less than 5 ohm.That why grounding resistance measurement is important because we need to ensure our grounding is good. read more

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Earthing Resistance Tester

24/09/2010 by 9 Comments

When we need to perform Earthing or grounding resistance measurement,the important equipment that we must have is the Earthing resistance tester.

We can found many types and brand of Earthing resistance tester in the market.It’s depend on our budget,requirement and application on actual work site.We need to ensure this device must always calibrated to get the accurate reading.

This equipment is used to measure the resistance ( ohm) of the earth.It is important to ensure that the electrical installation grounding system in accordance with the specifications and meet the earthing requirement. read more

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