Megger Test
Megger Test
(OP)
I need to megger a 6,6KV motor.I will be using a 5000/10000 Volt megger.What scale shoud I use and what must be the minimum ohm value be.Thanks
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RE: Megger Test
The megger should be set to 10k and the reading to earth should be 0.ie no leakage.If you are testing between windings then you should have equal readings between windings.Iam not sure that you should be doing this test as you do not sound competent to do this,as the motor is a HV class system.No disrespect intended.
Barry.
RE: Megger Test
Thanks . None taken.When I megger between phases ,should it also be on 10000V scale
RE: Megger Test
thh
RE: Megger Test
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RE: Megger Test
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RE: Megger Test
For a 6.6 KV motor, 2.5/5 KV megger would suffice.
For class B winding, PI > 1.5
For class F winding, PI > 2.0
One minute IR values of > 100 megohms at room temp preferred but not a must.
Whether you can measure phase-phase IR depends on all 6 leads being brought out separately to the terminal board and star/neutral shorting done there.
RE: Megger Test
Life is what happens while we're making other plans.
Wally
RE: Megger Test
RE: Megger Test
Gunnar Englund
www.gke.org
RE: Megger Test
Don`t perform the test at 10 KV is better at 5 KV because you only needs to take an insulation reading.
The Recommended minimun Insulation resistances(IRmin)values corrected at 40 C as Defined by IEEE 43-2000 like:
"IR min= KV + 1 ,For most windings made before about 1970,all field windings"
"IRmin= 100 MOhm, for most DC armatures and AC Windings built after about 1970 (Form wound coils)"
Best Regards,
PETRONILA
A 500 V Megger is suitable for machines rated up to 2.4 KV above this this voltage a 1000 V Megger is recommended.