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I'm working on a small transformer primary 240 secondary
I'm working on a small transformer primary 240 secondary 120. it is an Emerson E050 with jumpers on H3/H2 and F1/F2. they have blown about 6 of these and now I am looking at it … read more
Mike G.
Mike G.
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Vocational, Technical or Trade Scho
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I was told this transformer will take 208v and make 460v.
I was told this transformer will take 208v and make 460v. Please see the schematic and pics and let me know if this is true? Because the secondary is labeled 250V.… read more
Sam I
Sam I
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What size breaker I need to feed a 75 kva transformer? 1
Hi what size breaker I need to feed a 75 kva transformer? … read more
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How would you size this transformer? By kw of machine or
How would you size this transformer? By kw of machine or ocpd 63a?Please show the math and wire sizes primary, secondary and groundsTransformer primary will be 480v Delta secondary 400/230v wye… read more
Sam I
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Do you have to feed a neutral to a 480 volt transformer or
do you have to feed a neutral to a 480 volt transformer or does the transformer produce its own neutral … read more
Kevin
Kevin
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I have a 3phase 15kva 480vac primary 400vac secondary. How
I have a 3phase 15kva 480vac primary 400vac secondary. How many amps is coming off the secondary side… read more
Steve G.
Steve G.
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How do i wire a 3 phase transformer in reverse. Just today.
primary is 120 240 high leg secondarys need to be 480 i have 30kva… read more
Sam I
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Have model30T3H. Today. Sure applied voltage 240v 3 phase 3
sure applied voltage 240v 3 phase 3 wire. transformer 480 volt 3 phase delta to 208 y 120v… read more
ProGrade
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Hooking up a a transformer 480V primary 240/120V secondary.
Quick question. Hooking up a a transformer 480V primary 240/120V secondary. I'm not sure how to get 120? I know how to do the primary. Thanks … read more
Engineer-Tech
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I have a 230 to 230 isolation transformer delta ciruit.
I have a 230 to 230 isolation transformer for a delta ciruit. I wire it L1 L2 L3 primary and H1 H2 H3 secondary and did not ground H0. My voltage reading was 0 on One phase and 256 on the other two ph… read more
ProGrade
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I am a novice (at best) at industrial power (my factory has
I am a novice (at best) at industrial power (my factory has a few questions), we of course will hire the needed people when we finally launch our product..... but until then it's me. We are bring a ne… read more
Steve G.
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Hi steve. I have a 112.5 kva transformer which is a step up
Hi steve. I have a 112.5 kva transformer which is a step up from 120/208 to 277/480. I need to know on the secondary side of that transformer which is the 277/480v do i need over current protection si… read more
AssuredElectrical
AssuredElectrical
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High School or GED
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WHAT SIZE TRANSFORMER DO I NEED TO POWER A 460 VOLT 3 PHASE
WHAT SIZE TRANSFORMER DO I NEED TO POWER A 460 VOLT 3 PHASE 2 HORSE POWER PUMP THAT IS USED OFF AND ON ALL DAY. I HAVE 208/3 PHASE AVAILABLE. AND WHAT SIZE BREAKER FOR THE 208 SIDE OF TRANSFORMER AND … read more
AssuredElectrical
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I am having 277/480 3 phase wye installed from 208/120 3 phase
I am having 277/480 3 phase wye installed from 208/120 3 phase wye. I have used step up transformer to furnish service to our machines. The transformers are 480 Delta to 208/120 y which we used the se… read more
Steve G.
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I have a 45KVA 208/480 step up transformer that needs to feed
I have a 45KVA 208/480 step up transformer that needs to feed one 3 phase 480v 30 amp motor. what size wire would I need for my primary and secondary I had previously calculated 70 amps (using #4) to … read more
Jason
Jason
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when connecting a three phase 480vac to 120/208 transformer
when connecting a three phase 480vac to 120/208 transformer backwards to step up 208 volts to 480 volts should or should-not the xo lug be grounded?… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
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Hello, I am the owner of an offset printing company. I have
Hello, I am the owner of an offset printing company. I have assisted electricians before, and installed on my own, more than a few three phase machines. I understand the voltages used with these insta… read more
Craig
Craig
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how can you wire a simgle phase, multi-tap transformer to step
how can you wire a simgle phase, multi-tap transformer to step down 480 volt to 240 volts?… read more
electrifier
electrifier
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Mike

Mike

Master Electrician

1,426 satisfied customers

Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer

Jason

Jason

Service Technician

3,958 satisfied customers

Over 20 years of experience in all types of installations, troubleshooting, and repairs.

Mike G.

Mike G.

Master Electrician

8,290 satisfied customers

Proven Professional 49 years Experience

Kevin

Kevin

Licensed Electrical Contractor

4,414 satisfied customers

31 years Licensed Electrical Contractor in Illinois, Adjunct College Electrical Instructor, Former Electrical Inspector, Diploma: Digital Electronics, FCC Technician License

AssuredElectrical

AssuredElectrical

Master Electrician

3,264 satisfied customers

Contractor-42+ Years in the ElectricalTrade

electrifier

electrifier

Master Electrician

1,458 satisfied customers

Electrical contractor and electrical inspector for over 24 years with phone and networking expertise

Rich

Rich

Master Electrician

1,117 satisfied customers

Over 35 years residential, commercial, industrial wiring, install, troubleshoot, service, maintain

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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