thread238-415974
Hi,
Reference to above thread.
If we have an unknown CT (without nameplate data), do we have any method to determine its correct ratio?
Let say we injecting 10A primary, and get 0.02A secondary on a bushing CT (installed inside a Transformer for winding temperature used)...
Hello all. This is a nameplate of an air core reactor. Do your have idea what is the manufacturer in full name? I tried to google but not able to find any. The name is Equip Ele?????alta Tensa? LTDA, anybody have any idea...
Hello all, I am from IEC world. We have a 275/13.8 kV 3 phase transformer. Vector group is YNd1. There is a 4700/5A bushing CT installed at low voltage b phase. Attached is the detail of this Tx.
As the bushing CT primary side is not accessible, I can think of two option (other than the...
When we carry out polarity test or flick test for Current transformer and inductive voltage transformer, we can use a lantern battery to complete the test.
When come to 132kV CVT (outdoor type,Trench TEVF138 ) , the lantern battery yield no result (due to the capacitor divider C1 and C2?)...
Hello guys, i have a question on insulation resistance (IR) test.
When we conducted IR test with 5kV DC on a 132kV GIS busduct which is already degassing and in vacuum stage (means SF6 gas removed, and is under vacuuming close to 1 mbar), the insulation resistance value for the busduct L1 phase...
Hello guys. I have a question and hope somebody can answer me as i tried google on this question, but seems not able to find an answer for it.
The question is:
When we conduct insulation resistance test on power transformer (let said vector group is Dyn11) high voltage winding against ground...
Hello all,
I am a user of this product: LRM-ST type voltage indicators.
We have this voltage indicators installed on our 33kV switchgear cable side, to indicate whether the cable is energizing or not.
Just would like to know better on the following:
During we carried out VLF (very low...
