Had to come to the comments for the answer to the title. But to be fair the info one needs to get the answer is clear in the video. Just make us work for it. I love it
i can manage to pull 5KW just from my computer homelab, my idle draw is closer to 2KW since i don't turn off many things. It's impressively low draw for the amount of kit they are running but i guess its a totally different paradigm. Mostly analog switches/relays, so its only drawing what is needed as it performs its functions, very different from the power sucking digital CPUs we run today.
Funny I see this today. We just turned down a DMS-100 POTS switch in a remote office and replaced it with an IP switch last week. Went from 140a idle to 60a idle load. Most of the idle load is from long haul fiber ROADM’s. Yes, that’s plural 😂. That remote office in particular has 6.4Tb/sec switching capacity with 2 completely populated ROADM’s. The big offices I deal with usually have a switching capacity of a couple Pb/sec.
@@greg2092that particular office was sitting at 68F when I looked. When it’s 81F in there those fans are screaming! I would imagine the office would be using considerably more power at a higher temp. Filtered, dehumidified volume controlled ambient air is a godsend for power savings during the winter 😂.
Although these switches seem huge, they are much smaller than they would have been in actual service. The “full load” that I can offer with the call simulator is 48 telephones lines. That’s just a small fraction of what would have been handled in a large city.
I got most of mine from Ghost In The Wires. I lost track of Sarah when I left the place we both worked on the east coast… it was so cool seeing her in one of the videos UA-cam recommended to me and I was like “yeah, that tracks”
Does your museum want DMS documentation or anything from Nortel? My dad retired from that company and has a ton of documentation left over on the DMS switch. He passed and its all going away unless someone needs it.
It's not terribly difficult with *warm white* LEDs. Cool white has too much blue. The meter does NOT need to look like it uses a candle, or tired hamsters. I'm all for historic accuracy, but this is hokey. Sorry, Sarah, poor LED selection for a museum.
@@L0opNo, that could arc very badly. I work in telecom and have installed/biddle-bite tested -48v battery plants. On the output (like in this video) it’s enough to make an open ended wrench explode or at least melt.
@@L0opWhile it's true that 48 volts won't jump and cause an arc, that panel can provide a huge number of amps and thus produce a similarly huge amount of sparks when short-circuited.
"Museum running at full speed" implies a universe where "Sarah's moving museum" exists, á la Howl's castle, and I'd pay to see an anthropomorphic telephony museum no doubt
Measure the length of that 750 mcm cable and then measure the millivolts drop across it. You can find a table showing the cable’s resistance per foot so can calculate the amperage. Be sure to put your probes on the wire and not the crimps at the ends.
It's a lot of amps, but what voltage are you measuring? Power is voltage times current / So 150amps at 50 volts (rounding) is 7 500 Watts, (7.5 KW) That's impressive and likely less than I was expecting given how old some of the equipment is
Is the museum consuming electricity via a power purchase agreement with something ecological, or just a stabdard commercial (hugh coal mix)US grid supply??
Most COs have very large rooms full of batteries, in order to provide backup power in case utility power fails, and to keep the voltage stable when the load spikes (like a marker actuating).
How many customers can the museum support? Just to compare, a modern commercial office building with 384 phones (8x48 PoE Ethernet switches) will use around 3,000 watts. Maybe a little less.
This is a question we get asked often. It has no simple answer. Seems like it should just be an easy number to calculate, but it isn't. When you say "customers", do you mean telephones that are on hook? Off-hook? Dialing? Talking? Do you mean inter or intra-office trunk lines, which are separate from telephones but still require power? Do you mean carrier equipment (that really counts as transmission equipment, and not telephones, but it still consumes power). Also, do you mean terminating customers or originating customers? Both of those are different numbers. If you want to know how many on-hook originating telephones we could theoretically support in the entire museum, the answer is about 3,000. Once they go off-hook and start using resources that becomes a very different (and variable) number.
@@ConnectionsMuseum I suppose the relevant numbers would be the number of subscribers and the number of simultaneous calls (which may be hard to calculate as it depends on where each call goes. A computer simulation with random callers and callees might tell you the number with certain blocking probabilities) Real subscribers are both originating AND terminating, so use the lowest number from those two.
So if all of the equipment is powered up for 10 hrs a day.... U use some 75 kWh a day... Just wondering how many visitors a day your museum get to pay all the bills.
@@ConnectionsMuseummost of the modern rectiverters and battery plants I install nowadays run at around -54v. It’s also telecom equipment for microwave and fiber optic system for substations so the floating voltage standard might be a little higher than telephone COs might use.
I love the juxtaposition of a classic analog shunt ammeter to the modern clamp-on, insulated ammeter. How things have advanced.
150 amps x 52 volts == 7.8 kW
I’m actually shocked this huge beautiful plant full of electromechanical equipment doesn’t consume much more.
Had to come to the comments for the answer to the title. But to be fair the info one needs to get the answer is clear in the video. Just make us work for it.
I love it
thats just above two houses worth
i can manage to pull 5KW just from my computer homelab, my idle draw is closer to 2KW since i don't turn off many things. It's impressively low draw for the amount of kit they are running but i guess its a totally different paradigm. Mostly analog switches/relays, so its only drawing what is needed as it performs its functions, very different from the power sucking digital CPUs we run today.
That's not including the building itself.
Funny I see this today. We just turned down a DMS-100 POTS switch in a remote office and replaced it with an IP switch last week. Went from 140a idle to 60a idle load. Most of the idle load is from long haul fiber ROADM’s. Yes, that’s plural 😂. That remote office in particular has 6.4Tb/sec switching capacity with 2 completely populated ROADM’s.
The big offices I deal with usually have a switching capacity of a couple Pb/sec.
I swear the fans on the ciena 6500s/Fujitsu 9500 RODAMs pull more power than our old dms100/gtd5 friends
@@greg2092that particular office was sitting at 68F when I looked. When it’s 81F in there those fans are screaming! I would imagine the office would be using considerably more power at a higher temp. Filtered, dehumidified volume controlled ambient air is a godsend for power savings during the winter 😂.
I've wondered a few times how much power all this equipment used, and now we know. 7,800 watts is actually less than I would have guessed.
Although these switches seem huge, they are much smaller than they would have been in actual service. The “full load” that I can offer with the call simulator is 48 telephones lines. That’s just a small fraction of what would have been handled in a large city.
I have also wondered about this 😊
A Walmart will pull about 800 - 1000 Amp on all 3 phases at 480/277v on average non stop for comparison.
The lighting where i work can draw up to 14000 amps. Yes weve done this. 18 giant generators
Holy... What environment is that?
@mikecowen6507 film lighting, the Stephen King movie the stand
Wow, a 3ESS and a DMS I actually know what that is. I am so full of obsolete knowledge.
I got most of mine from Ghost In The Wires. I lost track of Sarah when I left the place we both worked on the east coast… it was so cool seeing her in one of the videos UA-cam recommended to me and I was like “yeah, that tracks”
Does your museum want DMS documentation or anything from Nortel? My dad retired from that company and has a ton of documentation left over on the DMS switch. He passed and its all going away unless someone needs it.
Yes! Can you send us an email? info [at] connectionsmuseum.org
Is that meter on fire? o.O
We put a fake LED old timey flame bulb in it because I complained that the previous LED’s looked too new and cold.
Yeah it is!
@@ConnectionsMuseumwas a traditional filament bulb not available? It's hard to replicate that traditional soft glow with LED.
It's not terribly difficult with *warm white* LEDs. Cool white has too much blue. The meter does NOT need to look like it uses a candle, or tired hamsters. I'm all for historic accuracy, but this is hokey. Sorry, Sarah, poor LED selection for a museum.
Wheres your PPE? Arc flash in an open panel is deadly, especially at that amperage. 😮
that should be 52V, which is enough to give you a zap, but won't arc, and isn't really fatal. correct me if I'm wrong though :D
@@L0opNo, that could arc very badly. I work in telecom and have installed/biddle-bite tested -48v battery plants. On the output (like in this video) it’s enough to make an open ended wrench explode or at least melt.
@@L0opWhile it's true that 48 volts won't jump and cause an arc, that panel can provide a huge number of amps and thus produce a similarly huge amount of sparks when short-circuited.
All you need is a welders hood and gloves and a set of leads and you could do so serious welding with that amount of current!
@@L0op It won't jump across air. It's still probably enough to boil wires and make a cloud of copper gas if you accidentally make a short circuit.
Fight The Power! Lovely meter.
"Museum running at full speed" implies a universe where "Sarah's moving museum" exists, á la Howl's castle, and I'd pay to see an anthropomorphic telephony museum no doubt
Not as much as I expected, and I think still less than my stack of old Dell Power Edge 2950 servers......
That's more than a rural CO I worked in!
1.21 gigawatts !!!
Just an idea. Add a whole building power monitor with history tracking
Thanks for the video!
😭Dont get close to the busbar
what voltage?
Measure the length of that 750 mcm cable and then measure the millivolts drop across it. You can find a table showing the cable’s resistance per foot so can calculate the amperage. Be sure to put your probes on the wire and not the crimps at the ends.
There already is a 50mV shunt for the meter.
Very cool.
How efficient are your rectifiers?
I concur with Domilbunn there; CTs are cheap; buy a bunch and do telemetry. That's not the right word.
It's a lot of amps, but what voltage are you measuring? Power is voltage times current / So 150amps at 50 volts (rounding) is 7 500 Watts, (7.5 KW) That's impressive and likely less than I was expecting given how old some of the equipment is
Which at a rate of 13¢/kWh, and 5 hours open, means the museum costs about $5 a week in electricity to run
She's measuring -48VDC (nominal) out the back of the rectifier plant; one-wire to ground.
Nice Battlestar Galactica pin there :)
Is the museum consuming electricity via a power purchase agreement with something ecological, or just a stabdard commercial (hugh coal mix)US grid supply??
Seattle is mostly hydro.
How do you generate this voltage with this power? You often talk about battery - you don't really use batteries?!
We use batteries! They're kept at a constant voltage by rectifiers that convert AC power to DC.
Most COs have very large rooms full of batteries, in order to provide backup power in case utility power fails, and to keep the voltage stable when the load spikes (like a marker actuating).
How many customers can the museum support? Just to compare, a modern commercial office building with 384 phones (8x48 PoE Ethernet switches) will use around 3,000 watts. Maybe a little less.
This is a question we get asked often. It has no simple answer. Seems like it should just be an easy number to calculate, but it isn't.
When you say "customers", do you mean telephones that are on hook? Off-hook? Dialing? Talking? Do you mean inter or intra-office trunk lines, which are separate from telephones but still require power? Do you mean carrier equipment (that really counts as transmission equipment, and not telephones, but it still consumes power).
Also, do you mean terminating customers or originating customers? Both of those are different numbers.
If you want to know how many on-hook originating telephones we could theoretically support in the entire museum, the answer is about 3,000.
Once they go off-hook and start using resources that becomes a very different (and variable) number.
@@ConnectionsMuseum I suppose the relevant numbers would be the number of subscribers and the number of simultaneous calls (which may be hard to calculate as it depends on where each call goes. A computer simulation with random callers and callees might tell you the number with certain blocking probabilities)
Real subscribers are both originating AND terminating, so use the lowest number from those two.
Wow 7800 watts , I just wired a heating blanket for a tank rated at 30,000 watts
The wall of box fans must explain somthing
That’s in front of an exterior door. It’s our air conditioner during the summer :)
So if all of the equipment is powered up for 10 hrs a day....
U use some 75 kWh a day...
Just wondering how many visitors a day your museum get to pay all the bills.
I think they also have some sponsors?
Isn't the Voltage pretty Low?
-48V DC is nominal for telephone work. Ours is actually high at -52
@@ConnectionsMuseum -- SORRY for my Error. I was thinking it was AC rather than DC.
@@ConnectionsMuseummost of the modern rectiverters and battery plants I install nowadays run at around -54v. It’s also telecom equipment for microwave and fiber optic system for substations so the floating voltage standard might be a little higher than telephone COs might use.
Why you guys are running this low voltage?
this is not the building mains supply. It's the typical phone company voltage for the equipment, which would be on battery in the old days.
Is that real or apparent power?
It's DC so it's all real
Why in dc ?? I think u must Measure it in ac current
Your computer and smartphone runs on a DC, but You use a PSU which lowers the voltage and rectifies it. Same here but with "little" more power.
Use a better meter with a proper loop for big conductors. They are abundant in the industry
What happens if you run at 41%
Show me your a crazy leftist without saying you’re a crazy leftist
I wonder if we can calculate how many amps it takes to transmit the dumbest 67 bytes I've ever read.
@@albertturnbuckle7860 I hear dying your hair purple helps the process. 😘
@MrRumpy Glad my hair color triggered you. Feel free to continue watching our videos by the way. The ad revenue buys us donuts and coffee :)
How do you tell if someone is a broflake? They'll tell you by saying something idiotic and off-topic!
This is a museum. Crazy leftists are cool here.