Distance relays have been proposed as backup relays for transformer protection, primary protection being Differential relays. Any thoughts on
1. what zones / logic should be used.
2. Some have recommended using POTT schemes. Anybody using this?
3. Ways to mitigate inrush
Thx
Description :
SF6 breakers are directly mounted with MOSA (station class)on the line side. The arrester neutrals are connected to the interrupter end plate (as ground). There is a gasketed joint and quite a few metallic joints before the actual ground. (the equipment is grounded and arrester is...
Hi Gents,
What are the advantages and disadvantages of the shield of CT secondary cable being grounded at both the ends (Control house and breaker/transformer etc.) The above case is for a 345kV substation with shields grounded at both ends. What would be the effect of leaving an open end ...
Gents,
I am new to this forum.
I am commissioning a substation where I need to perform thru fault test to confirm relay current stability (For Differential and other relays and measure expected vectors etc.)
Question is what amount of current will flow in the autotransformer neutral and its...
