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Limiter Lugs

Limiter Lugs

Limiter Lugs

(OP)
Working on a project where a recent short circuit study showed some existing equipment overdutied by a slight margin. Was thinkig of installing limiter lugs to reduce available short circuit current. Does anyone have experience using limiter lugs to reduce short circuit currents?

Thanks.
b

RE: Limiter Lugs

They don't reduce the fault current.

RE: Limiter Lugs

Limiter lugs are intended to protect the cables from short circuit damage.  The do not reduce fault current; however, the clear quickly when subjected to a high fault current.  They may not operate in their current-limiting range if the fault current is a lower level fault as is sometimes the case in arcing faults.  One draw-back to them is that adequate space for them is necessary at their termination points.  I have had difficulty with some smaller pad-mount transformers being able to accommodate them.

RE: Limiter Lugs

Another drawback is that they don't coordinate with anything downstream.  

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