Full Version: Ac Transformer Question ?
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
Draw up or google a schematic and the answer should come to you........
QUOTE (MWBbanshee @ Feb 24 2011, 11:01 AM) 
Draw up or google a schematic and the answer should come to you........
dry type transformer missing front cover all i can assume is its a acme, if you dont mind pm me how to google a schematic gd is the extent of my computer knowledge and carlos is at work, lol.
QUOTE (farmdog @ Feb 24 2011, 10:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
Are you saying that you can't tell the primary from the secondary terminals?
Whats the primary voltage?
You can tone out the coils with a simple ohm-meter to determine the individual coil connections. (I had to do this on a MIS-MARKED from the factory 22,500 delta to 240/120 padmount after it blew the primary breaker upstream ten miles away when the lineman tried to energize it[due to the mis-markings, it was wired as a dead short!] That was quite a time, let me tell ya!).
What is a "scrubber"?
Pics?
QUOTE (farmdog @ Feb 24 2011, 09:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
QUOTE (THE CHICKEN @ Feb 24 2011, 09:35 PM)
QUOTE (farmdog @ Feb 24 2011, 10:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
Are you saying that you can't tell the primary from the secondary terminals?
Whats the primary voltage?
You can tone out the coils with a simple ohm-meter to determine the individual coil connections. (I had to do this on a MIS-MARKED from the factory 22,500 delta to 240/120 padmount after it blew the primary breaker upstream ten miles away when the lineman tried to energize it[due to the mis-markings, it was wired as a dead short!] That was quite a time, let me tell ya!).
What is a "scrubber"?
Pics?
480 in and 480 out cleaned for a dc drive, my guys removed the covers and while blowing it out blew off all the markings then a slitter opeator scraped the cover
i cant figure out the secondary side which has been cleaned ?
QUOTE (saychz316 @ Feb 24 2011, 10:37 PM)
QUOTE (farmdog @ Feb 24 2011, 09:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
So the primary is still wired up? If so you can energize it and identify the correct secondary leads but isolate them first. Check the taps real good most of them I have seen are marked during manufacturing eather on the tabs or the leads.
QUOTE (shock @ Feb 25 2011, 06:38 AM)
So the primary is still wired up? If so you can energize it and identify the correct secondary leads but isolate them first. Check the taps real good most of them I have seen are marked during manufacturing eather on the tabs or the leads.
no, nothing hooked up all lugs are empty and no markings anywhere.
A narrowback is what lineman call electricians
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
primary and secondary voltage is the same the transformer just cleans the 3 phase for the dc drive, 16 years at this steel plant and im dealing with the biggest cluster eff i have ever seen our sister company in riverside is pulling a roll former and shipping it to me in pieces, and their ripping and tearing nothing marked huge ass puzzle. but yes scrubber i guess is a industrial term, whats a narrow back ?
QUOTE (farmdog @ Feb 25 2011, 05:25 AM)
QUOTE (saychz316 @ Feb 24 2011, 10:37 PM)
QUOTE (farmdog @ Feb 24 2011, 09:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
QUOTE (saychz316 @ Feb 25 2011, 03:06 PM)
A narrowback is what lineman call electricians
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
primary and secondary voltage is the same the transformer just cleans the 3 phase for the dc drive, 16 years at this steel plant and im dealing with the biggest cluster eff i have ever seen our sister company in riverside is pulling a roll former and shipping it to me in pieces, and their ripping and tearing nothing marked huge ass puzzle. but yes scrubber i guess is a industrial term, whats a narrow back ?
curious as to what it means im sure its a compliment QUOTE (farmdog @ Feb 25 2011, 05:25 AM)
QUOTE (saychz316 @ Feb 24 2011, 10:37 PM)
QUOTE (farmdog @ Feb 24 2011, 09:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
QUOTE (farmdog @ Feb 26 2011, 05:58 AM)
QUOTE (saychz316 @ Feb 25 2011, 03:06 PM)
A narrowback is what lineman call electricians
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
primary and secondary voltage is the same the transformer just cleans the 3 phase for the dc drive, 16 years at this steel plant and im dealing with the biggest cluster eff i have ever seen our sister company in riverside is pulling a roll former and shipping it to me in pieces, and their ripping and tearing nothing marked huge ass puzzle. but yes scrubber i guess is a industrial term, whats a narrow back ?
curious as to what it means im sure its a compliment QUOTE (farmdog @ Feb 25 2011, 05:25 AM)
QUOTE (saychz316 @ Feb 24 2011, 10:37 PM)
QUOTE (farmdog @ Feb 24 2011, 09:54 AM)
im working on a 75 kva scrubber with no markings for primary or secondary and no way that i know of to figure out the downstrem, im tapped correctly for 480 any ideas would be appreciated.
1. whats a scrubber? im a lineman, not a narrow back, so is this an electrician term?
2. unless i am going stupid, can you rephrase the second half of the question in english? by downstream, are you trying to figure out the secondary voltage output? tapped up for 480? 480 on the primary windings? 480 on the secondary windings?
without a schematic, i would not mess with it. could be causing yourself a bunch of headaches, trouble, frustration, and money if it goes south when you energize it. was it energized when you started on it? or did somebody just hand it to you and say hook it up? if so, leave it alone.
you are not going to be able to tell the input and output voltages by simply hooking up a meter to it. it can be done, but you are going to need a little more intricate meter and tools than your handy dandy fluke in your tool belt. if there is a serial number somewhere on it, and you know the manufacturer, call them, give them the number, and they should be able to tell you everything you need to know, including get you a copy of the schematic.
schematics are the most important thing when it comes to transformers. worst case, people can be killed by hooking them up wrong. in a not so worse case, you blow the breaker in the panel that feeds it, and maybe burn up the transmorgifier and and melt a little wiring. although that is usually on a much higher level than most deal with....
just looked it up( person of slight build unfit for hard labor ) thats classic
How many taps are on each winding? Is there any factory wire jumpers connecting any of the taps together? Do any of the taps have a wire or copper band connected to the transformer enclosure or frame? Picture would help. 480V primary to 480V secondary can be determined with a meter depending on the transformer. Factory jumpers can also help you determine what is going on.
QUOTE (sandkist @ Feb 26 2011, 08:01 AM)
How many taps are on each winding? Is there any factory wire jumpers connecting any of the taps together? Do any of the taps have a wire or copper band connected to the transformer enclosure or frame? Picture would help. 480V primary to 480V secondary can be determined with a meter depending on the transformer. Factory jumpers can also help you determine what is going on.
six, yes landed on three and five for 480, no , maybe pm your number and you could walk me through it, thanks. ill try for a pic i havent yet mastered that capability.
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