Disabled Recloser Loop Schemes

[Mbrooke]

Obviously you've got main line circuits with damage from start to end. Won't deny it. However I can't help but notice what appear to be single trouble spots causing 2000-4000 customers to lose power where as this company typically has smart devices between every 500 customers.

https://outagemap.eversource.com/external/default.html

Am I just biased or did they disable SCADA reclosers during tropical storm Isiasis letting substation breakers clear the whole line instead? Or at least disable normally open tie points from picking up lost load? If so what advantage would this bring? On the surface I'd think such an act would cruel to customers even if it lets them say "hey, we restored 200,000 customers in the last few hours" when this could've been done automatically during the storm.

Could be wrong though...

 

[crshears]

One reason my company will sometimes choose to block reclosure schemes during storm events is because of line device duty cycle limitations.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

 

[Mbrooke]

Repeated faults?

 

[crshears]

Numerous lightning strikes are one possible example; repeated conductor slap in high winds is another. We use a device duty cycle monitoring program that auto blocks reclosure when count limit is hit, with annunciation to staff when time has elapsed and reclosure can be re-enabled.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

 

[Mbrooke]

Could it also be to prevent downed wires from becoming re-energized?

 

[sushilksk]

In this case manual energisation will have same consequences. or patrolling is required before manual energisation.

Other reason may be : Repeated operation of breakers may lead to breaker problems