CT shorting blocks

[jim dungar]

No core means still linear at high current levels.

But there will be a trade off at low current levels (e.g. <10%). This can cause some issues if you are trying to use these for power quality/harmonic analysis.

My portable test equipment set includes clamp-on CTs and Rogowski coils. The coils are definitely much easier to put around existing 3000A conductors.

 

[GoldDigger]

I asked because I am not familiar with what people in the field call them.

Sent from my XT1080 using Tapatalk

 

[SG-1]

Is that a pun as in they explode better?

ice

Bazinga, yes that was a pun.

 

[iceworm]

I asked because I am not familiar with what people in the field call them.

My mistake - I thought it was a physics question.

I can't tell you the consensus - since I hear the term misused everywhere. I can only tell you what I call them and it all depends on the group and the context. I rarely ask for clarification for others' speak - it is either clear from context, or it doesn't matter.

ice

 

[circuitrider]

I have a general idea of how shorting blocks work, but I am having trouble finding a definitive explanation of how to use them. Let?s say you have a CT connected to two points on the shorting block; one is referenced to ground and the other isn?t. Obviously the one not referenced to ground is the one that needs to be shorted first, correct? If you shorted the grounded terminal first and remove the wire going to the meter, I?m thinking you would have a real problem (assuming high current situation). Are there any safeguards to this, or is it simply a matter of having the right personnel doing the work?