Reclosers

What are Reclosers?

They are electrical devices on your overhead distribution line that attempts to re-energize the line after an interrupt in the voltage, usually caused by fallen branches, lightning stricks, animals crawling on the wire, etc. Without reclosers, the system would fault and trigger a breaker or fuse, and would need an electrician to resolve the fault and reset the fuse or breaker. Reclosers are programmed make a preset number of attempts to re-establish the voltage before determining a permanent fault.

What are the different types of reclosers?

Single phase or three phase reclosers: Single phase reclosers will close just one phase of the distribution line that it is on, and leave the remaining two phases on. Where as a three phase rescloser has more applicable uses and is more economical.

Hydraulic vs Electronic reclosers: Hydraulic reclosers are commonly single phase reclosers. The overcurrent triggers a trip coil in series with the distribution line. The electronic recloser is 3-phase reclosers, and is more customizable for programming, meter, and automation.

What does the NEC say about reclosers? Check fault protection and see manufacturer's recommendation.

What does the National Electric Safety Code (NESC) say about reclosers?

- Provide proper labeling

- Use proper sizing/rating

- Provide adequate amperage grounding adequate per Rule 093C

(Btw I don't have a copy of the NESC, but I do have google. There could be more stuff.)

Must see Recloser demonstration:

http://www.sandc.com/products/intellirupter/intellirupter_lp.asp

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