Temperature winding correction

01/06/2011 by 5 Comments

When we perform insulation resistance tester,temperature winding effected the accuracy of Mega Ohms reading.The basic theory is when temperature increase,the insulation resistance decrease due to physical factor of material for winding.

To get a accurate reading for insulation resistance ( Mega Ohms ),we need to ensure the minimum temperature during measurement.

According to IEEE  43,the temperature correction should be to 40 °C and the correction factor for temperature is such that the minimum insulation resistance value is doubled for every 10 °C decrease in winding temperature. 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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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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Insulation Resistance Tester

21/09/2010 by 2 Comments

Why we need to perform insulation resistance tester?This test is strongly recommended to prevent electrical shock for equipment,electric motor or electric cable.We also can determine any abnormal condition or leakage before installation and can rectify the problem.

Insulation resistance tester is the one of  important equipment/meter for determining the resistance of the insulation in motor winding, transformers winding or electrical cable in good condition or not.

This tool facilitates off to make an informed decision about the condition of equipments can be used again, whether or not based on the value of reading difficulties.According to standard IEEE 43: IR test minimum value of the electric motor is a 1 Mega Ohm ( 1 MΩ ) read more

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