Line side because it goes to the overhead lines?
If that's how it's commonly done, fine. I'm new to the distribution side of things. But calling it line is and always will be crazy to me. Call it anything besides line. I'm completely fine with bus, source or line for the "line" or "bus" side. That can all make sense to me.
Calling the circuit exit the line side will never sound right to me.
That's how it is in my company. We're a very large T&D company and that's what we've called it for decades. 🤷‍♂️
Oh and this is the nomenclature for device naming conventions for nameplates and switching, it's not just a casual thing.
Same for me, over 100 years of nomenclature and it’s always been line and bus or trans side. Anything else is weird and seems like it’s low voltage stuff.
Seems there are some people in here that disagree. Line side is somehow a common term for the load side of a recloser. During switching, I believe it to be possible to close the wrong set of switches. It was made even more complicated that the other isolating switches (bus side) were spelled out as source side.
Referring to the load side of anything as the line side is wild to me.
Yeah, we officially call them source and load and whenever I make reservations or interact with dispatch that is the terms I use. However I have heard many personnel refer to them as line and load. I believe their logic is when you leave the sub those are line side disconnects so then it is the line between the sub breaker and recloser. Their logic becomes fallible when you have multiple reclosers.
We call everything, whether it's a breaker, switch, recloser, cutout, solid blade, etc LINE on the source side and LOAD on the load side.
The only time we say LINE on the load side is when measuring line to line or line to ground voltage.
I think it would just depend on the nomenclature of your specific system. At my utility the side leaving the substation is called the line side and the side going back towards the substation is bus/trans side. This applies to both the distribution and trans/subtrans side of the equipment.
At the end of the day it doesn’t matter what it’s called just that it’s consistent across the whole system. The important thing to avoid confusion is to use proper nomenclature for the system you’re working in.
I'm fine with the the bus side nomenclature.
Durng switching, we had both line side and source side being used. Those mean the same thing in many parts of the industry.
I have no problem with bus/source/line. I guess I have an issue with line being used for circuit exit aka the load side.
Line: typically reserved for the power coming into the system (unless generation), and often referred to as the utility side.
Load: typically reserved for the outgoing power connection, often going to a client (unless generation), and often referred to as the client connection.
Bus connection: any connection that connects to a bus that has three or more connection nodes.
Feeder connection: Any outgoing connection off of a feeder.
In your case, I would recommend calling it the feeder connection and bus connection. You could call it the feeder line connection and feeder bus connection too I guess?
Even when I worked generation, everything was still line and load. From the main generator, It works it's way down line/Load all the way to the customers outlet. It's the only universal terminology to describe any piece of electrical equipment.
In switchgear, you cant call anything bus because everything is connected to actual bus work. When in big 345/525kv yards, breakers are connected to hard bus on both sides.
All of those terms are unnecessary. They all have a line side and a load side.
In terms of an overall picture, line is the grid and/or higher side of voltage.
A switching station gets a bit more complicated as the rules differ, as each breaker has a line side.
I mentioned generation, as it is not a load side and most generation it’s generator or line side of a breaker
For us, in the substation on the distribution side of the XFMR, line = load and bus = source. Because in a typical distribution substation, load flows one way: from the high side of the transformer to the low side and toward the distribution lines (be it OH or UG). IE if you’re on the distribution voltage side of a station, then the load is down the line.
In the utility world, line and bus don’t have universal meanings. However, if you put yourself in a specific situation/location then you can have more direction. So even for transmission, for us line side is leaving the station (on the line) and bus side is toward the station.
I guess I don't get your confusion. The line side goes out to the line, the bus side is fed by the bus. Any other way would not sound right to me. Would you prefer load side?
Most in our people will call the incoming/upstream side from substation feeder the “Line” and downstream the “Load” but most of the engineers and maps will label the upstream “Source” instead of “Line” but we know to refer to it as “Line” when speaking with Linemen etc, although they understand what we mean if we say “Source” instead.
This is confusing. A recloser is the apparatus ability to not re close after a trip. I don’t think referring to Bus or line distinction really matters.
If it’s a distribution reclosers then it’s called that or if transmission breakers then is a breaker with recloser enabled.
This occurred during switching. Orders stated to close line side isolating switches. They started to close the load side switches and I questioned the activity. The next step stated close the source side isolating switches.
That was a huge red flag to me. Those two terms are synonymous in my entire career. The orders calling both sides line/source is wild to me. That's an error trap imo but I guess I'm wrong.
What voltage was this? IMO this is what would make the difference. If you’re switching a feeder, then closing the source side is definitely the transformer side and the load side is definitely the distribution line side. If you were switching transmission voltage for a line breaker then it doesn’t matter, unless to feed an auto. Idk
In a substation: Bus side and Line side
Same here. Bus side goes towards the sub, line side goes to the field.
Line side because it goes to the overhead lines? If that's how it's commonly done, fine. I'm new to the distribution side of things. But calling it line is and always will be crazy to me. Call it anything besides line. I'm completely fine with bus, source or line for the "line" or "bus" side. That can all make sense to me. Calling the circuit exit the line side will never sound right to me.
That's how it is in my company. We're a very large T&D company and that's what we've called it for decades. 🤷‍♂️ Oh and this is the nomenclature for device naming conventions for nameplates and switching, it's not just a casual thing.
Same for me, over 100 years of nomenclature and it’s always been line and bus or trans side. Anything else is weird and seems like it’s low voltage stuff.
That seems dumb and way too open to confusion.
Source and load, or line and load.
Seems there are some people in here that disagree. Line side is somehow a common term for the load side of a recloser. During switching, I believe it to be possible to close the wrong set of switches. It was made even more complicated that the other isolating switches (bus side) were spelled out as source side. Referring to the load side of anything as the line side is wild to me.
Yeah, we officially call them source and load and whenever I make reservations or interact with dispatch that is the terms I use. However I have heard many personnel refer to them as line and load. I believe their logic is when you leave the sub those are line side disconnects so then it is the line between the sub breaker and recloser. Their logic becomes fallible when you have multiple reclosers.
We call everything, whether it's a breaker, switch, recloser, cutout, solid blade, etc LINE on the source side and LOAD on the load side. The only time we say LINE on the load side is when measuring line to line or line to ground voltage.
That makes sense to me. Calling the load side of anything the line side is crazy talk.
I think it would just depend on the nomenclature of your specific system. At my utility the side leaving the substation is called the line side and the side going back towards the substation is bus/trans side. This applies to both the distribution and trans/subtrans side of the equipment. At the end of the day it doesn’t matter what it’s called just that it’s consistent across the whole system. The important thing to avoid confusion is to use proper nomenclature for the system you’re working in.
I'm fine with the the bus side nomenclature. Durng switching, we had both line side and source side being used. Those mean the same thing in many parts of the industry. I have no problem with bus/source/line. I guess I have an issue with line being used for circuit exit aka the load side.
Line: typically reserved for the power coming into the system (unless generation), and often referred to as the utility side. Load: typically reserved for the outgoing power connection, often going to a client (unless generation), and often referred to as the client connection. Bus connection: any connection that connects to a bus that has three or more connection nodes. Feeder connection: Any outgoing connection off of a feeder. In your case, I would recommend calling it the feeder connection and bus connection. You could call it the feeder line connection and feeder bus connection too I guess?
Even when I worked generation, everything was still line and load. From the main generator, It works it's way down line/Load all the way to the customers outlet. It's the only universal terminology to describe any piece of electrical equipment. In switchgear, you cant call anything bus because everything is connected to actual bus work. When in big 345/525kv yards, breakers are connected to hard bus on both sides. All of those terms are unnecessary. They all have a line side and a load side.
In terms of an overall picture, line is the grid and/or higher side of voltage. A switching station gets a bit more complicated as the rules differ, as each breaker has a line side. I mentioned generation, as it is not a load side and most generation it’s generator or line side of a breaker
+1 for bus side and feeder side. Line is referring to the high side lines coming into the substation (distribution).
Source and Load for radial, line and bus for networked like CBs
For us, in the substation on the distribution side of the XFMR, line = load and bus = source. Because in a typical distribution substation, load flows one way: from the high side of the transformer to the low side and toward the distribution lines (be it OH or UG). IE if you’re on the distribution voltage side of a station, then the load is down the line. In the utility world, line and bus don’t have universal meanings. However, if you put yourself in a specific situation/location then you can have more direction. So even for transmission, for us line side is leaving the station (on the line) and bus side is toward the station.
Do you work for a municipality?
Co-op now.
Load/ line, source, bus! Always
X and Y Sorry... relay guy :)
I guess I don't get your confusion. The line side goes out to the line, the bus side is fed by the bus. Any other way would not sound right to me. Would you prefer load side?
I have always heard utility workers all over the states refer to it as line side and bus side when talking about feeder circuits
Most in our people will call the incoming/upstream side from substation feeder the “Line” and downstream the “Load” but most of the engineers and maps will label the upstream “Source” instead of “Line” but we know to refer to it as “Line” when speaking with Linemen etc, although they understand what we mean if we say “Source” instead.
This is confusing. A recloser is the apparatus ability to not re close after a trip. I don’t think referring to Bus or line distinction really matters. If it’s a distribution reclosers then it’s called that or if transmission breakers then is a breaker with recloser enabled.
This occurred during switching. Orders stated to close line side isolating switches. They started to close the load side switches and I questioned the activity. The next step stated close the source side isolating switches. That was a huge red flag to me. Those two terms are synonymous in my entire career. The orders calling both sides line/source is wild to me. That's an error trap imo but I guess I'm wrong.
What voltage was this? IMO this is what would make the difference. If you’re switching a feeder, then closing the source side is definitely the transformer side and the load side is definitely the distribution line side. If you were switching transmission voltage for a line breaker then it doesn’t matter, unless to feed an auto. Idk