Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Current transformer class 5L400

Status
Not open for further replies.

zertic1985

Electrical
Joined
Nov 26, 2012
Messages
7
Dear Members,

Please anybody tell me about the current transformer 5L400

What is the explanation of the 5L400

I know the other classes 10P10,5P10,ClassX,but for me this is new thats why i(5L400) am asking.
 
My educated guess based on CSA (Canadian) and older IEEE/ANSI (USA) standard nomenclature for protection class CTs:

5 = composite error (5%) at the accuracy limiting factor (ALF) which in this case might be 20

L = low leakage design, i.e., ring-type core with fully distributed windings

400 = secondary terminal voltage at the ALF, in this case would relate to burden of 100VA at 5A, or 4 ohms

Current CSA classes are 2.5L and 10L. Perhaps knowing where this CT currently is, or is going geographically, may shed more light on the class definition.
 
Thank so much for you reply randyman
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top