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By Megger testing (meggering) of the motor any one can measure the IR of the motor. MEGGER is a device used to measure IR. Analog Megger device may generate 500 volts..it gives coil to coil or coil to body IR value...it should not be less than 2 Mega ohm, generally it should be or kept more than 5 mega ohm...thanks
...DEEPAK RAJPUT
What else can I help you with?
What is the use of resistance box?
The use of a resistance box or a "Decade Box" is to help calibrate instruments used to measure electrical values such as Voltage, Current, and Resistance. Without them you would not have a known value of resistance to use as a set point.
What is LV cable insulation resistance acceptance value?
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
What is the acceptable pi value in insulation resistance?
The PI value depends on the type of equipment being tested and the voltage level. Roughly it shall not be below the value of 2.0
What should be minimum insulation resistance value for 11 kV HT cable?
65 meg ohm if it is 11 kv
How might ambient temperature may affect the resistance values you would measure in a circuit?
Ambient temperature might affect the readings of the resistance value you would measure because the resistance of some materials changes with the temperature.
What is a electrical polarization index test?
The electrical polarization index (PI) test is a type of insulation resistance test used to assess the condition of insulation in electrical equipment. It involves measuring the resistance of the insulation between conductors at different voltages to determine if the insulation is deteriorating. A higher PI value indicates better insulation quality, while a low PI value may signal insulation breakdown or moisture contamination.
Main part of a megger?
The main part of a megger, or insulation resistance tester, is its high-voltage generator, which produces a test voltage to measure the insulation resistance of electrical systems and components. It also includes a sensitive galvanometer or digital display to indicate the resistance value. Additionally, megger devices typically have test leads and terminals that connect to the circuit under test, allowing for accurate readings of insulation quality.
How wecan do meggering?
Meggering, or insulation resistance testing, involves using a megohmmeter to measure the resistance of electrical insulation. To perform a megger test, first ensure that the equipment is de-energized and safely isolated. Connect the megohmmeter leads to the conductor and ground, then initiate the test by pressing the test button; the device applies a high voltage and displays the insulation resistance value. After testing, ensure to discharge the circuit and reconnect any removed connections.
What does 10 megaohms on a solenoid mean?
A measurement of 10 megaohms on a solenoid indicates its insulation resistance, reflecting how well the solenoid can prevent electrical leakage. A high resistance value, such as 10 megaohms, suggests that the solenoid's insulation is in good condition and effectively isolates the electrical components from each other and the environment. This is important for ensuring reliable operation and safety in electrical systems. If the resistance were significantly lower, it could indicate potential insulation degradation or failure.
What is the resistance value?
Electrical resistance is measure in Ohms. A function of voltage divided by current. It is also dependant on the length and cross sectional area of the conductor.
How to use a mega meter?
A megohmmeter, or mega meter, is used to measure insulation resistance in electrical systems. To use it, first ensure the circuit is de-energized and all connected equipment is safe to test. Connect the megohmmeter leads to the insulation and ground, set the desired voltage (typically 250V, 500V, or 1000V), and then activate the device to take the reading. The display will show the resistance value, indicating the quality of the insulation; higher values (usually in megohms) indicate better insulation.
Is the R-value of insulation indicate resistance to heat flow?
Yes, the R-value of insulation indicates its resistance to heat flow. The higher the R-value, the greater the insulation's ability to resist heat transfer, making it more effective at insulating a building.
The r value of insulation indicate resistance to heat flow?
yes the R-value does indicate resistance to heat flow
What is the R value of a double glazed window?
The R value of a double glazed window is a measure of its thermal resistance, indicating how well it insulates against heat transfer. A higher R value means better insulation.
Is r-value good or bad?
it is a good thing i think R Value is the thermal resistance of a given material. The higher the R Value the more thermal resistance and the better the insulation. So, an R48 roof system is warmer than an R32 roof system. All insulation materials are rated by their R Value. An inch of rigid insulation has a higher R Value than an inch of fiberglass insulation. Check with the insulation manufacturer for the R Value.
What happens to the value of insulation resistance of a cable when the cable gets older?
Insulation resistance should be approximately one megohm for each 1,000 volts of operating voltage, with a minimum value of one megohm. For example, a motor rated at 2,400 volts should have a minimum insulation resistance of 2.4 megohms.
What is the use of resistance box?
The use of a resistance box or a "Decade Box" is to help calibrate instruments used to measure electrical values such as Voltage, Current, and Resistance. Without them you would not have a known value of resistance to use as a set point.
