distribution line insulator washing

[magoo2]

Our company has some distribution circuits in coastal areas. I'm looking for a check list approach to give to our field people on what grounding/bonding requirements to follow with hot line washing of the distribution insulators.

We use a handheld jet nozzle on an insulated aerial lift. The nozzle connects to a non-conductive hose connected to a water tanker truck.

Since the lift and hose are non-conductive, I assume we don't have to bond the nozzle to the lift. While the lift isn't grounded, we routinely bond the bucket truck to the system neutral (which is grounded).

Are there any other bonding/grounding requirements that I missed?

I've gone through IEEE Std 957, Guide for Cleaning Insulators, and it seems very broad. It covers transmission insulator strings on towers as well as distribution line insulators and insulated and non-insulated aerial lifts, conductive and non-conductive hoses, etc. I just want to make sure I extracted the essence which applies to my situation.

Thanks in advance.

 

[cuky2000]

The best results cleaning technique is starting from bottom to the top of the insulator.

Cleaning insulator often could be time consuming,costly and could expose to personael to shock and trip protective devices.

There are othr alternative that can be last longer and could be cost effective,safer and increase the long term reliability.Some of those technique to evaluate are:

* Coating insulator with silicon grease or similar compund.
* Increase creeepage distance with creepage extender or making larger support.
* Minimize overvoltage with additional surge arrester.

*

S