shedding load

[app.john]

between are clearance points there are ten overhead transformers; do you have to open every trans. to work on the line? or is EPZ the pole your working on sufficient.

[topgroove]

different utilities have different rules. some require every potential source of backfeed be grounded.to me if your in a EPZ with grounds on both sides of you withen 6 feet with nothing energized on the pole leather gloves are fine.I must admitt though, after working so many years in gloves and sleeves, I always feel strange working in leather gloves.its almost easier to just wear gloves and sleeves. i'm sure i'm just as fast.

[Pootnaigle]

I bleve most outfits would be comfortable with grounds on both sides of ya rather than having to open every xrmr. If you stop and think about those ten xfmrs could be spread out over 20 miles in some cases and it would take lots longer to make 2 trips to each location( one to open and one to close) than it would to ground it and even work it all in gloves and sleeves.

[1st Class Husker]

Any one having or had any trouble with trucks hydraulics giving them problems when its damn cold!!!!

We have a 2006 altec 55' boom with double buckets! For the past 3 years when it gets cold 25 or under, some of the functions do not work! (everything but the boom) so that means no jib, no bucket rotation, and no impact wrench!!! VERY FRUSTURATING!!!!


Altec suggested adding avaition fluid to oil, (nope)
blew out orifaces in hydraulic block (nope)
Finally tried a new hydraulic block sent from the company still (nope)

running out of options any suggestions will be appreciated!!!!!

Bring the truck in the shop 15-20 min after little warming everthing works!

sucks to have a $200,000 man lift!

[THE KID]

Could you hook up something like a block heater to the hydraulic tank to keep the oil from getting thick over night?

[1st Class Husker]

We already have a tank heater!

We valve antifreeze from the motor into the oil res. and then back to the motor!

[thrasher]

Afraid I don't remember the actual numbers now but I know from past experience that some companies further north than where I am now actually run two different weights of hydraulic oil. A thin hydraulic fluid in cold weather and a heavier one in the summer. Talk to the altec factory and find out their recommendations for oil in northern michigan, to use during the winter and their recommendation for florida to use in the summer.

[T-Man]

In class I demonstrate how a transformer works. . .I take two 1:1 coils and energize one with 120 volts and attach the other one to a light bulb, then set them on top of each other. . .I turn the power on and the light bulb glows slightly. I clamp an iron core around the two coils to increase efficencie and the light glows brighter. Got the picture.

Now I tell them let's say the 120 volt source is coming from a generator. . .and the side the light is hooked to is the primary side. . can I ground that while the low side is being fed by the generator?

Most say no. . so I ground the light side and the light goes out. . .

I test the generator side and there is still voltage there and the coils are grunting like mad but not blowing the fuse.

In the above senario if you used The EPZ you would have protection from backfeed, (there is no physical connection between the source and the grounds)

however it's a quite and sneaky thing because as soon as you took your grounds off the backfeed would feed the transformer and make primary voltage and if you weren't paying attention or thinking you were still safe you would be toast!

That's when I take the ground off the light and it goes back on. . .Be careful

This aint magic but it sure acts that way!

[MI-Lineman]

In class I demonstrate how a transformer works. . .I take two 1:1 coils and energize one with 120 volts and attach the other one to a light bulb, then set them on top of each other. . .I turn the power on and the light bulb glows slightly. I clamp an iron core around the two coils to increase efficencie and the light glows brighter. Got the picture.

Now I tell them let's say the 120 volt source is coming from a generator. . .and the side the light is hooked to is the primary side. . can I ground that while the low side is being fed by the generator?

Most say no. . so I ground the light side and the light goes out. . .

I test the generator side and there is still voltage there and the coils are grunting like mad but not blowing the fuse.

In the above senario if you used The EPZ you would have protection from backfeed, (there is no physical connection between the source and the grounds)

however it's a quite and sneaky thing because as soon as you took your grounds off the backfeed would feed the transformer and make primary voltage and if you weren't paying attention or thinking you were still safe you would be toast!

That's when I take the ground off the light and it goes back on. . .Be careful

This aint magic but it sure acts that way!

ALBAT did that presentation also!

Up hear we call a "physical connection" a "hard mechanical connection"? Kind of like when you got back feed on an open (or blown) fuse on three phase and you're readin back feed on it (induction from three phase banks down the line)? Where's it go when ya close the fuse or pull the string on the pickup mac? I won't even try to explain the "theory" on that but we just say as soon as ya make "hard mechanical connection" the back feed is canceled out? THEN I HAND THE STICK TO THE APE AND TURN AWAY LIKE SOMETHIN MIGHT HAPPEN TO F$CK WITH THEIR MIND!:D

The "induced" back feed will kill ya but there's no fire (usually:o) when ya close'er in!;)

"ELECTRICAL THEORY"....AINT IT FUN!!!!:D