I would say it is ferroresanance, most likely to occur on a radial feed with 3 phase delta connected primary side transformers. The only solution is to have a GOAB switch that will close all 3 phases...
Type: Posts; User: Electriceel
I would say it is ferroresanance, most likely to occur on a radial feed with 3 phase delta connected primary side transformers. The only solution is to have a GOAB switch that will close all 3 phases...
We don't fuse anything on the secondary side. The formula for secondary full load amps is. (KVA) times (1000) divided by (secondary phase to phase voltage) divided by (square root of 3). For this...
Y primary,Y secondary voltage, you will need to bond the primary neutral bushings together in a continuous loop to the primary neutral conductor.
Secondary neutrals will all need to be bonded...
They seem to work for us, but ours are all on single phase lines in the rural areas, not much for load on them.
Ours are all the older brown glass so that tells us they have some age on them.
Those are what I would call an early version of a reclosure.
The left fuse would blow dropping and closing a knife for the middle fuse, if need be the middle blows closing a knife for the last fuse....
What you call a repeater switch is what I call a 3 shot.
It is a version before an oil filled reclosure for 1 phase.
1st fuse blows and drops to the arm which closes a knife for the second fuse, it...
A 3 phase bank, 240 volt delta secondary, lighting tub is 100 kva, the wing tubs are 50 kva. Serves approximately 8 customers in a business district situation
What would you consider to be an...
Anything round is always more durable than a square or rectangle.
I suggest round
Seems to be an entire company thing, from the top to the bottom.
Amen, retirement will not come soon enough.
Get pictures of this device and/or the form numbers of the metering.
We would never assume a customers load is balanced, you never when they change loads.
Not going into a lot of detail.
But what I see happening is that old style lineman is fading fast.
Back in the day we would take a pole, a digger, a basket, hardware, capacitors, etc. Everything...
Basically what you do is start at your substation and get a reference to A-B-C phases then you can go anywhere on your system and be able to tell what phase you are attaching it to.
Yes it will help...
As per the literature they are good for 100 amps. You can put them 2 of them on making it 200 amps.
All new construction we are to get rotation and leave it in meter sockets, CT cabinets of each customer on that bank.
Wye secondaries only for new customers.
Not sure why the utility would up and...
Terex 4047 won't do squat when less than 30 degree angle, digging a hole is a joke.
You get the boom stood up and then it is a work horse.
We should have gotten the option of 2 lift cylinders...
Seems someone bought Pitman and they are still made.
Yes they all have reliefs anymore so it takes a pretty healthy boom to do what we used to do the wrong way.
I was hoping that Versalift would...
Due to our company requiring safety toed boots, I have a new never taken out of the box pair of Red Wing, model 921, size 10EE, lineman boot. Make an offer as they will be sold.
Retired DOT dude came in gave us some pointers, then we did the testing was pretty easy, a lot of us went ahead and got the tanker endorsement.
After passing the tests then you will need a truck,...
Have any of you been involved with High Resistance Grounding being installed on customer equipment? Good or bad looking for input?
I stand corrected, all pole grounds are #6, except for our transmission and that is #2.
All padmount equipment we use #2 str.
We use 5/8"X10' ground rods, #6 cu. for wire. All transformer pole mount or pad mount get 1 ground rod, all urd riser poles 1 ground rod, all arrestor poles 1 ground rod. All rods must test 25 ohms...
We have had both Chance and Hastings for years, and have yet to have any of them fail. We use the Hastings cleaner, Hastings Wax, and then apply a generous coat of tri-flo wipe off the excess and let...
I work for the neighboring utility they came to me for advice and I couldn't give them any so was hoping for some input, the utility is very small, they currently have no capacitors, probably less...
Wondering what would be some things to look for when a very small utility has a system power factor of .8 during the hrs. of 2-4a.m?
There are no commercial businesses that run during the night,...
I am hoping that we have all of our mulitiplier mistakes cured, all of our miss wiring mistakes, at this time we double check each other on new installations double check with billing to make sure it...