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What are the types of instruments used to measure open circuit and short circuit faults in electrical machines windings?
Wiki User
∙ 11y ago
The main test instrument is called a megohm meter, megger for shortened version. On the whole megger testing is non destructive. What happens is a DC voltage is applied to the device or winding under test. It is an insulation test to see is the insulation has been injured in any way to cause a short circuit when normal power is applied to it. On my megger there are 3 ranges 300V, 750V, and 1000 volts. Applying the proper voltage is essential to not damaging the device you are testing. Working voltages up to 240 volts should use the 300 range. Working voltages up to 600 volts use the 750 volt range and working voltages above 600 use the 1000 volt range. As you can see if you used the 1000 volt range on a device that had a working voltage of say 24 volts you could damage the insulation just by testing it. So meggering a device is non destructive if you use the tester as its instructions tell you to.
Wiki User
∙ 11y ago
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Biggest problems are the windings either having an open circuit or a short circuit.
What core type and shell type?
A 'core type' transformer core is one in which the primary windings and secondary windings are placed around each of the limbs, as opposed to a 'shell type' core, in which the two windings are placed across the centre core. A core-type core is a magnetic circuit equivalent to an electric series circuit, whereas a shell-type core is equivalent to an electric parallel circuit.
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An electric circuit.
An electrical circuit with components placed one after the other?
series circuit
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When you turn on a television what is the electrical circuit?
The electrical circuit when turned on it is considered closed. By the same token when an electrical circuit is turned off the electrical circuit is considered open.
What are the classes of failures in a tranformer?
Biggest problems are the windings either having an open circuit or a short circuit.
What things need a electrical circuit?
Electrical devices need an electrical circuit.
What is the largest product group in the electrical testing and measuring instruments industry?
ATE, the largest industry segment, includes T and M instruments for semiconductors, circuit boards, and computer disk drives.
What is he definition of electrical current?
The current flowing in an electrical circuit.
Why conductors in electric machines are put in slots or why don't you use another method instead of slots?
Slots enable the windings to be installed below the outside circumference of the armature, in order to enable the airgap between the armature and yoke to be minimised -thus minimising the magnetic circuit's reluctance (opposition to the formation of magnetic flux). Some machines, however, use 'salient' (meaning to 'stick out') in which the armature windings are wound around pole pieces -these are for slower machines, such as water turbine driven types.
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Quite often, the word "circuit" is used for an electrical circuit. In that case, the energy is electrical energy.
The drawing of an electrical circuit is called?
The drawing of an electrical circuit is called a.............= schematic drawing.
Does blu-tack break an electrical circuit?
No, an electrical approved switch is used to break an electrical circuit.
When a switch in an electrical circuit is turned off what will happen?
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