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Can a meggar tester be use to measure voltage standing wave ratio in a feeder cable?
Wiki User
∙ 12y ago
No
Wiki User
∙ 12y ago
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How do you use a meggar?
A megger is used to test the resistance of high voltage cables, insulation and motor windings. The test employs a megohm meter.
What is insulation megger draw and explain with neat diagram?
Meggar is a hand driven tool for measuring insulation resistance and earth resistance.
How can we decide a transformer failed due to earthing problem?
Meggar test or continuity test of winding with respect to body / earth will tell you the truth.
Identify one item that needs to be disconnected prior to carrying out insulation resistance tests?
The voltage source needs to be disconnected prior to carrying out insulation resistance tests. Disconnect any electronic devices like Variable Frequency Drives, Soft Starters etc. These devices are likely to get damaged if meggar test is done keeping them in circuit.
How do you check with mega that you have good grounding on electrical circuit?
when you say "mega" I am asuming you mean meggar-ohmmeternot the lottery This instrument is not appropriate to test for good grounding Good grounding requires LOW resistanceA Meggar is used for measuring for HIGH resistances You need a MICRO-ohmmeter or ground resistance meter A company called AEMC makes nice ground testers
How much time duration is required while Meggar test is applied?
The time duration for a megger test is as long as it takes to turn the handle of the megger about five times. Voltage is generated on the first turn and if there is an insulation breakdown on the device being tested it will show instantaneously. If the megger is an electronic megger hold the generate button down for about three seconds.
How do you measure electrical insulation resistance value?
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
How does a simple component and continuity tester work?
A continuity tester is sometimes referred to as a "bell set". To make one, procure a battery, an electric bell or buzzer, and some wire. With wire 1, connect one battery terminal to one side of the bell. With wire 2, momentarily connect the other battery terminal to the other side of the bell, and note the buzzer sound. Any time you complete the circuit, you will hear that sound. Now create these connections: battery+ => wire1 => bell => wire2 => component => wire3 => battery- If the unknown "component" conducts current, then you will hear the bell, otherwise there is a fault.
How do you test fluorescent lighting circuit?
Continuity of electrical cables must, because it is the process of inspection to found any discontinuity in the cable
Is maintenance required on electrical bus bars?
This is an interesting question. I will assume you refer to bus bars - as a separate component - that connect two pieces of equipment, and not as an integral componet of a device such as a switch. "Maintenance" can mean whatever a person wants it to mean."Required" is almost equally vague. Maintenance could include testing, inspecting, cleaning, repairing, tightening, measuring (temperature-amperage) or all the above. "Required" generally means required by the Authority Having Jurisdiction (AHJ) - That could be any number of people: the local code enforement agency, an insurance company, utility company, the owner, or the manufacturer or a combination of them. Some insurers require the main service components of a building to be shutdown once every year or so and have all the joints torque wrench tightened. This would include bus-bar joints. Some require thermoscans to find hot stops. Some utility companies require the bus to be meggar tested before re-energizing, even if for a ten minute outage. I do not believe the NFPA electrical standard has any particular requirements for bus bar maintenance, however they always state "follow the manufacturer's recommendations". From a practical point of view the bars themselves do not degrade, but the joints can give trouble occassionally. The insulation around or supporting the bars can degrade and cause trouble. Thermoscanning is a nice inexpensive way to keep an eye on developing problems.
