intermediate terminals of CT secondary cable shield grounding
intermediate terminals of CT secondary cable shield grounding
(OP)
Our criteria for CT secondary cable shield grounding is:
- For power house: cable shield grounded at the one ends.
for outdoor substation: cable shield grounded at the two ends.
The route of the CT secondary cable is not straight from CT to relay. There are intermediate terminals.
The question is:
can we assume sections of shielded cable for grounding, or we must keep shielding continous?
We prefer sections like:
1-shielded cable from CT to junction-box1: Grounding at CT;
2-shielded cable from junction-box1 to junction-box2: grounding at junction-box1;
3-shielded cable from junction-box2 to relay board: grounding at junction-box2;






RE: intermediate terminals of CT secondary cable shield grounding
RE: intermediate terminals of CT secondary cable shield grounding
I think you're contradicting yourself or I am not clear. See thread below:
davidbeach (Electrical)
18 Jan 06 18:45
waross, CT cables have to go from point A to point B. Point A is where the CT is located, very little choice as to where that might be, and a brutal electromagnetic environment, particularly during fault events. Point B is somewhere else, a control room for example, where things are much quieter electromagnetically.
The route of secondary cable has 3 cable-sections interconnected.
Should I connect shield of each 3 section and grounding both ends
or
ground one end of each shield-section? This solution is better for installation.
RE: intermediate terminals of CT secondary cable shield grounding
RE: intermediate terminals of CT secondary cable shield grounding