a few more
Trailerized Power Distribution
This is a power trailer for a telecom company.
1 utility input @ 1200A 600V
1 cam-lock gen input @ 600A 600V
1 thomson isolation bypass ATS
1 500kva K13 TX
3 cam-lock outputs @ 800A 120/208V w/ 200% Neutrals
Provisions to double this all up for 'stage 2', with another gen input and another set of 3 camlock outputs.
Just passed our spe-1000 inspection, ran a load test at 100% capacity for 4 hours. IR thermography on all connections and buswork.
1 utility input @ 1200A 600V
1 cam-lock gen input @ 600A 600V
1 thomson isolation bypass ATS
1 500kva K13 TX
3 cam-lock outputs @ 800A 120/208V w/ 200% Neutrals
Provisions to double this all up for 'stage 2', with another gen input and another set of 3 camlock outputs.
Just passed our spe-1000 inspection, ran a load test at 100% capacity for 4 hours. IR thermography on all connections and buswork.
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Pfffft you Canadians and your fancy pants quality craftsmanship and skill.
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Isn't it against code to have a dead body just laying behind the transformer. Pretty sure they're supposed to be clear and free from obstructions.
Haha its ok its an American body we just step over them.
On a more serious note, it is difficult to justify where we fit in with the CEC. I suppose you could call it a factory-built relocatable structure. We do try to stay within the code as much as possible. However, sometimes it just doesn't translate to a trailer application, or isn't possible due to size constraints. We did go as far as to add the second door, to reduce the clearance in front of the distro panel from 1.2M to the standard 1M (1m is ok as long as you don't have to walk past the gear to get out).
We decided to fab up our own "cable tray", and I was expecting push-back from our inspectors (and from you guys). There are 30x #444 DLO cables between the transformer and the distr. panel. They are all just over 100% diameter away from each other. I used the derating table 5D for multiple layers of single conductor installed in a cable tray. The table only goes to 6, so I used that value for the derating.
We pushed the load test to 120% for the last 30 minutes. Each 800A breaker was at around 850 amps. The cables all reached what I would call 'warm', at around 45 degrees C. Initially I had setup a reactive load bank but the cost was prohibitive at around $28,000 just for the 1 day rental with transport. I settled for a 600V resistive load bank along with a pair of transformers so I could get a reactive element to the load. I ended up with a PF of .85, which I was happy with for testing purposes. The actual load will have a PF of .75
Here are a few more less-polished photos
On a more serious note, it is difficult to justify where we fit in with the CEC. I suppose you could call it a factory-built relocatable structure. We do try to stay within the code as much as possible. However, sometimes it just doesn't translate to a trailer application, or isn't possible due to size constraints. We did go as far as to add the second door, to reduce the clearance in front of the distro panel from 1.2M to the standard 1M (1m is ok as long as you don't have to walk past the gear to get out).
We decided to fab up our own "cable tray", and I was expecting push-back from our inspectors (and from you guys). There are 30x #444 DLO cables between the transformer and the distr. panel. They are all just over 100% diameter away from each other. I used the derating table 5D for multiple layers of single conductor installed in a cable tray. The table only goes to 6, so I used that value for the derating.
We pushed the load test to 120% for the last 30 minutes. Each 800A breaker was at around 850 amps. The cables all reached what I would call 'warm', at around 45 degrees C. Initially I had setup a reactive load bank but the cost was prohibitive at around $28,000 just for the 1 day rental with transport. I settled for a 600V resistive load bank along with a pair of transformers so I could get a reactive element to the load. I ended up with a PF of .85, which I was happy with for testing purposes. The actual load will have a PF of .75
Here are a few more less-polished photos
Attachments
Pfffft you Canadians and your fancy pants quality craftsmanship and skill.
Isn't it against code to have a dead body just laying behind the transformer. Pretty sure they're supposed to be clear and free from obstructions.
![]()
It is so clean , that it doubles as a morgue in an emergency .
:jester:
1 - 20 of 20 Posts
