Medium Voltage underground cable fault indicators

P

pete25

Member
For those with experience specifying cable fault indicators, if you have medium voltage feeder cables that originate on a substation switchgear feeder breaker and span multiple manholes to finally terminate on a unit substation switch in a building, do fault indicators installed in the manholes provide any benefits? Keep in mind that the cable is un-spliced between the substation switchgear breaker and unit substation switch. Manholes are used to facilitate the pulling of the cable only.
 
pete25 said:
For those with experience specifying cable fault indicators, if you have medium voltage feeder cables that originate on a substation switchgear feeder breaker and span multiple manholes to finally terminate on a unit substation switch in a building, do fault indicators installed in the manholes provide any benefits? Keep in mind that the cable is un-spliced between the substation switchgear breaker and unit substation switch. Manholes are used to facilitate the pulling of the cable only.
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If there are no splices or elbows in the manholes the fault indicators will provide little or no value.
Unless you have rodents chewing on the cables.

Personally, I prefer the older fisher pierce mechanical fault indicators when I order them.
The ones with batteries such as the Wesco indicators are sealed batteries. Last anywhere from 6-10 years. 6-10 years is a real short time with UG cables. It will seem like yesterday you installed them and tomorrow you have to change them out.

They aren't like the overhead navigator fault indicators where the battery can be changed out.
 
Last edited:
Hv&Lv said:
If there are no splices or elbows in the manholes the fault indicators will provide little or no value.
Unless you have rodents chewing on the cables.

Personally, I prefer the older fisher pierce mechanical fault indicators when I order them.
The ones with batteries such as the Wesco indicators are sealed batteries. Last anywhere from 6-10 years. 6-10 years is a real short time with UG cables. It will seem like yesterday you installed them and tomorrow you have to change them out.

They aren't like the overhead navigator fault indicators where the battery can be changed out.
Click to expand...
We do not have splices however, can you explain what you mean by elbows?
 
Hv&Lv said:
If there are no splices or elbows in the manholes the fault indicators will provide little or no value.
Unless you have rodents chewing on the cables.

Personally, I prefer the older fisher pierce mechanical fault indicators when I order them.
The ones with batteries such as the Wesco indicators are sealed batteries. Last anywhere from 6-10 years. 6-10 years is a real short time with UG cables. It will seem like yesterday you installed them and tomorrow you have to change them out.

They aren't like the overhead navigator fault indicators where the battery can be changed out.
Click to expand...
I first saw that as "fisher price". Fisher Price my first medium voltage fault detector :ROFLMAO:
 
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