Answer / rakesh thakur

HI-pot test is use to test the insulation breakage of
various electrical auxilaries like cables,switchgears
etc.A HI-POT is a autotransformer which produces high
voltage of the desired level of testing, like for 33kv
system we will increase the output voltage of HI-POT slowly-
2 from o to 33 kv and apply it across the testing specimen.
If insulation of the specimen is all right than there will
be zero lekage current(meter affixed on HI-POT) and if
there is any insulation breakage in the system than there
will be certain value of leakage current on certain value
of value of voltage and circuit will got tripped.

Answer / asif

Dear tech,

because of this test you can know well of your equipment
insulation strength and conductor strength.

Answer / kanagasabai

HI-pot is High pontential test(or) High voltage test.

Many people are familiar with a continuity test. A
continuity test checks for "good connections." You do a
continuity test by seeing if current will flow from one
point to another point. If current flows easily enough then
the points are connected. Many people aren't familiar with
a hipot test. "Hipot" is short for high potential (high
voltage). A hipot test checks for "good isolation." You do
a hipot test by making sure no current will flow from one
point to another point. In some ways a hipot test is the
opposite of a continuity test.

Continuity Test: "Make sure current flows easily from one
point to another point."

Hipot Test: "Make sure current won't flow from one point to
another point (and turn up the voltage really high just
make sure no current will flow)."

In the simple case a hipot test takes two conductors that
should be isolated and applies a very high voltage between
the conductors. The current that flows is watched
carefully. Ideally not much current will flow. If too much
current flows the points are not well isolated and they
should fail the test.

Answer / karthik

Hi-Pot test (High Potential) test is used to find out the
insulation strength of a conductor.Usually a voltage of 125%
of rated voltage is applied during the initial test of the
insulation.For any future tests(which should not be carried
out)the applied voltage is less than 100% for not degrading
the insulation.

Answer / sheik

this test you can know well of your equipment
insulation strength and conductor strength

Answer / aeccsrpudur

sir
its a high potential test
normally this test is conducted for cables and generator windings
for example if the cable is rated for 11kv and it should with stand 1.25 times of rated voltage during surge conditions
procedure for test - apply dc high voltage 1.25 times gradually and noted the leakage current ,it should be below 100 micro amps for healthy cable for 1 minute

kindly tell me how the load on generator increase by just increasing the fuel of prime mover, as if for exampple 20 MW gen set is synchronized the load ramps from zero to 20 MW gradully and during this procress only fuel of prime mover increases. Which thing determines the load on generator with respect to fuel

4 Answers   Birla,

voltmeter kya hota hy ?

2 Answers  

why is  use the star and delta connection and difference

1 Answers  

how to identify the direction flow of electrons in a conductor? if i want to check the sequence in kv lines, is any device is available?

3 Answers  

how does an open delta transformer works

2 Answers  

What is the Difference Between the SCADA & PLC ? Both it also control and Supervise Then what Special in Scada & PLC?

1 Answers  

what are the different types and applications of compressors?

1 Answers  

what is the meaning of servo motor. In trains, what type of the motors we are using at the bottom of each compartment

5 Answers  

can we use generator(a.c) as a motor.if so how if not why.

2 Answers  

what is the preventing maintenance of transformer

1 Answers  

When a 25kV line touches the train, will passenger get shock?

3 Answers  

How much earthing require for h.t.22 k.v. cable in coming side & out going & 22 lighting arrest or,22 k.v.D.o. & A.B. switch.

1 Answers