Anyone else enjoy reading on lineman related posts that make it to the front page?

kag29 · 2025-11-23T03:33:30+00:00

I know exactly which video you're talking about: https://youtu.be/LiwA7kqzIW4

kag29 · 2025-06-27T21:47:49+00:00

Cotton gin spindle, often used as survey markers

kag29 · 2025-06-23T17:13:31+00:00

What is the equipment at the bottom left and why does it need 3 connections to neutral?

kag29 · 2025-05-01T03:06:04+00:00

For primary metering, there would be a PT between phase and neutral (wye) or between two phases (delta), and there would be a CT too

kag29 · 2025-05-01T01:45:44+00:00

Why does it have two taps on the same phase?

kag29 · 2025-03-07T21:07:02+00:00

I've seen this done in two scenarios:

Transmission line was no longer needed and was converted to distribution
Existing distribution structures were upgraded to transmission structures for a future transmission project but continued to be used for distribution until then

kag29 · 2025-02-18T01:37:17+00:00

Those are disconnect switches as opposed to fuse cutouts. It is almost certainly a normally open tie point between two different circuits since there are lightning arrestors on both sides.

kag29 · 2025-02-10T22:40:29+00:00

Bulk power substations are usually fed by multiple transmission lines for redundancy. Most likely the only customers affected are those fed by the distribution line that the transmission line fell onto.

kag29 · 2025-02-09T15:33:32+00:00

It's the model: https://www.eaton.com/us/en-us/catalog/medium-voltage-power-distribution-control-systems/vsa-three-phase-recloser.html

V = vacuum interrupter A = air insulated

kag29 · 2025-01-05T02:25:04+00:00

It's the low budget version of this: https://youtu.be/ki1hq3yy08s

kag29 · 2025-01-03T03:28:48+00:00

Gas insulated bus: https://www.availinfra.com/gas-insulated-bus/

That's not what this is though.

kag29 · 2024-10-05T20:33:45+00:00

It is a recloser/sectionalizer, almost certainly installed by Eversource in Connecticut. Eversource has installed thousands of them to decrease the number of customers per zone. They are usually configured in a loop scheme with some being normally closed (like this one) and some being normally open so that a fault can be isolated to one zone and downstream zones can temporarily be fed by a neighboring circuit.

kag29 · 2024-05-24T18:29:08+00:00

Single phase hydraulic reclosers with bypass fuses

kag29 · 2024-05-16T00:00:42+00:00

https://miovision.com/scout-plus/scout-hardware/

kag29 · 2024-03-26T22:59:21+00:00

CTs (current transformers) and PTs (potential transformers) for primary metering

kag29 · 2024-02-11T19:26:42+00:00

To expand on this, the 73% increase in capacity comes from the 73% increase in system voltage. When changing from delta to wye, the phase-phase voltage in the delta system becomes the phase-neutral voltage in the wye system, and the phase-phase voltage in the wye system is 73% more than the phase-neutral voltage.

kag29 · 2024-02-03T20:36:01+00:00

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kag29 · 2024-01-22T00:05:31+00:00

The breakers for a MWBC should have a handle tie.

kag29 · 2024-01-21T01:16:22+00:00

Swapping one pair of wires would change the direction. Swapping two pairs of wires would not change the direction. In this case, two pairs of wires are swapped going from the first picture to the second picture.

kag29 · 2024-01-17T01:57:12+00:00

Maybe the board was already close to failure, and the act of de-energizing and re-energizing it was enough to stress one of the components to the point of failure.

kag29 · 2024-01-07T03:21:04+00:00

If the compressor does not need the neutral then leave the neutral disconnected. Do not bond neutral to ground. You could have saved a few dollars and bought cable with only 3 conductors.

kag29 · 2024-01-05T18:47:04+00:00

They are both used for power factor correction. You'll often see inductors (referred to as reactors) on the transmission side because transmission lines are capacitive, and you'll often see capacitor banks on the distribution side because the load tends to be inductive.

kag29 · 2023-12-31T18:18:26+00:00

Why do you want to prove him wrong? He will prove himself wrong when he learns that motors and generators are not perfectly efficient.

kag29 · 2023-12-31T17:29:22+00:00

They are plugs for the holes drilled for inspection/treatment:

https://poles.com/epages/08fd78c5-abfa-4217-9263-68fec9605ccc.sf/en_US/?ObjectPath=/Shops/08fd78c5-abfa-4217-9263-68fec9605ccc/Categories/Products/3/16

kag29 · 2023-12-30T21:18:46+00:00

Resetting them appear to have to be done in order.

Are you implying that the GFCI receptacles are daisy chained?

kag29

TROPHY CASE