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Wednesday, 11 September 2013
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Insulation Resistance Test Or Megger Test Procedures With Circuit Diagram
marinesite.blogspot.in
Suka
In this article we will go through Megger test first of all i want to say both insulating
resistance tests and megger test are same. which is usually carries out to find the insulation
of different machines windings conductor wires generator windings etc.
1.444 orang menyukai marinesite.blogspot.in.
Megger Testing Instrument
Megger testing instrument is a high resistance Ohmmeter with a build in
generator
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It is equipped with three connections Line Terminal (L), Earth Terminal (E) and
Guard Terminal (G)
Resistance is measured between the Line and Earth terminals
The “Guard” terminal is provided for special testing situations where one
resistance must be isolated from another.
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The generator can be hand-cranked or line-operated to develop a high DC
voltage which causes a small current through and over surfaces of the
insulation being tested
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Importance Of Insulation Resistance Test Or Megger Test
An insulation test is carried out to test the integrity of the insulation between
conductors.
Which help to find the short circuit problems in the circuit
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It also serves as the best guide to indicate the health of the equipment
Procedure To tests the Insulation
Test the megger before use, whether it gives INFINITY value when not
connected, and ZERO when the two terminals are connected together and the
handle is rotated.
To do the test you ensure the cable is disconnected from any devices (megger
normally work on 500v, 1000v testers for higher voltage testing).
Make sure that no eddy current in the device by earthing it.(very important)
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Instrument should be in normal working temperature because resistance is
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Ensure both ends of the cables are separated from each other (connect one end
in terminal strip if necessary).
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Now connect the megger terminals to the conductors which has to be meassured
Then hand crank the generator and a high DC voltage generated which causes a
small current through and over surfaces of the insulation being tested.
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Insulation Resistance Test Or
Megger Test Procedures
With Circuit Diagram
If the Reading shows Infinity means the conductors having good insulation.
Here it shows a megger circuit diagram
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Bijoy
About The Author:
He is a marine engineer sailing with ESM.He loves to share his views and opinion
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Help others
rakesh
in reeds its saying... at some rudder angle
there will be no torque on the stock for
balanced type... this may be the reason bt i
cudnt understand it....
MARINE SITE: Discussion orals class
IV · 3 days ago
rakesh
minimum torque is required for balanced
one in terms of toque unbalanced having
more toque thn semi banalnced minimum
is balanced one...
MARINE SITE: Discussion orals class
IV · 3 days ago
Vineeth M
bcz balanced rudder require more torque to
move compared to semi balanced rudder.
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psyc00
as reg 34......
en route
should pass from odmc
not with in special area
50 nm away frm nearest l
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Rupam Kanathey
what r the AC compressor parameters
MARINE SITE: Discussion orals class
IV · 1 week ago
rakesh
most of the ships are using balanced rudder
not semi balanced i thk... if m wrong plz
correct me..
MARINE SITE: Discussion orals class
IV · 3 weeks ago
santosh
why we r not using a balanced type
rudder.....why semi balance is in use?
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The formula used to calculate the
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