A direct successor to the Westinghouse Iso Phase Bus Plant in - - PowerPoint PPT Presentation

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A direct successor to the Westinghouse Iso Phase Bus Plant in - - PowerPoint PPT Presentation

May 23, 2023 538 likes •2.34k views

A direct successor to the Westinghouse Iso Phase Bus Plant in Cinn Ohio Credentials 24/7 Private Ownership We pick up the phone after 5pm 513-312-8527 Chad Shell 914-968-4440 Bruce Hack Owners Crown Electric In 2006 Crown

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A direct successor to the Westinghouse Iso Phase Bus Plant in Cinn Ohio

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Credentials

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24/7

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Private Ownership

We pick up the phone after 5pm

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513-312-8527 Chad Shell 914-968-4440 Bruce Hack

Owners – Crown Electric

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In 2006 Crown Electric built the Newest IPB factory in North America

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In 2010 – in the middle of the worst recession the US has had since the Great Depression Crown Electric doubled our factory and added 6,500 sq. ft. of

  • ffice space.
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And 50,000 sq ft

  • f fenced in area

for delivery staging.

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Crown Electric is partnered with some of the Industry’s largest OEM’s

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Crown Electric furnishes and installs IPB for GE Generator Circuit Breakers

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Crown Electric furnishes and installs IPB for Siemens Energy Services

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Crown Electric is the industry’s successor to Westinghouse and their Circular Non Seg Bus Duct

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Crown Electric introduced its

  • wn line of

Disconnect Switches to 30,000 Amps

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Crown Electric developed the Joule-ious 105

  • nline thermal

monitor

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Crown Electric is the only North American IPB manufacturer with full factory based field service and installation capabilities.

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Crown Electric the people who build your IPB, install your IPB

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Crown Electric provides material & services to the nuclear industry

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Engineering submittals in 3D CAD

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Computerized welding

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Crown Electric’s

computerized welds are all capable of being certified

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And Crown Electric’s most

senior design engineer(s) are CWI’s

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Crown

manufactures all manners of custom cabinetry, medium voltage switchgear & outdoor houses

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Crown Electric designs, fabricates & installs IPB replacement and uprated coolers – to nuclear plant size

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Crown Electric does more GSU change-outs than anyone. And we do them turn-key

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IPB Specification Considerations

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Crown’s insulator support windows are a thoughtfully designed system.

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There is great value in having

IPB insulator support windows that allow for visual inspection and cleaning.

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Crown Electric requires only one (1) insulator per support point.

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Lets get to know

ANSI/IEEE C29

Iso Phase Bus insulators should be Dew Point rated

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Lets look at C29.1 section 4.6

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Lets look at C29.1 0 Table 2

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Dew Point rated insulators mean you never need pressurization and it is totally passive.

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No leaks. No pressurization systems to maintain. No loss of BIL. No down time

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Never accept pressurization without applying an evaluation penalty.

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The Westinghouse slider mounting design allows insulators to harmonize with thermal expansion and better dissipate short circuit forces.

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Windows hold space heaters and can be field upgraded well after initial install.

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Windows accept electric conduit connections on either side.

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Windows use “O” rings not gaskets.

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Windows hold drain plugs and breathers

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Now lets discuss the IPB’s Enclosure

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I have two questions for you that we can discuss in more depth at some later time off-line.

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1 – Did you know that IPB enclosure current is more or less equal to the conductor current ? For all practical purposes – IPB is a transformer with a 1:1 turns ratio.

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Your specs could well improve the IPB product you get if they clearly state that enclosure max. temperature of 80 degree C shall be calculated at 100 % of the same maximum current value as the IPB conductor

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2 – If you evaluate and charge for losses in transformers – why don’t you do the same evaluation for IPB ? It’s the same electrons and the same heat ( energy ) lost from the production process.

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Something to notice

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Enclosures for connecting IPB to capital equipment.

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Notice the Covers

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See how they mount?

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Those raised welded mounting frames takes:

Engineering

Drafting Fabrication Welding Finishing

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Those raised welded mounting frames…

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$ Cost money $

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If you want them. You need to specify them.

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BTW

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Shipping sections

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#’s of shipping sections Points of break in shipping sections All cost installation $$’s

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Consider discussing this issue with your bidders during the evaluation process

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As we wind down- allow me to point out two more things worth knowing about…

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1 – Shunts

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Shunts are made of bundles of very thin laminates of

  • aluminum. And they

move (often).

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The shunt bundles should be welded on the inside – not the

  • utside. A broken

laminate can bend

  • utward toward the

ground plane !

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2 – know your connection points. They should be quality silver plated. The silver plating should be per a certified procedure.

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Spec 3-5 mils. And vendor should provide certification with their bid.

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NEVER accept wipe-on silver plating.

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Silver Plating A Special Process at Crown Electric

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SLIDE 159 When Crown Electric began using the Electrodeposited silver plating machines, the instructions with the machines were vague in what was needed to meet the standards of our industry. The instructions showed how to plate, but lacked the information on how much or how long to deposit the silver to achieve the desired results. We researched and purchased the standards that apply to the process. The first standard is for adhesion ASTM B571-97; we needed to know that the silver stayed in place. The second is the standard for thickness ASTM B700-08. According to the standard ASTM B700-08 the thickness for electrical contact connectors of limited wear is 2.5 micrometers. At Crown we wanted a margin greater than 2.5m to ensure supply of a consistent and superior
  • product. So we embarked on the task of preparing coupons and plating at
incremental times, then sending them out to a second party laboratory for testing and documented results.
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SLIDE 160 Because the testing process results in destruction of the samples, we needed to validate our process and document a procedure to set in place for our quality standards as well as to meet our ISO program requirements. The process began by making the coupons out of the material we use for our
  • product. We prepared them for plating as standard process and recorded the
rub time per coupon, then sent the coupons to the lab. Our first couple of coupons passed the adhesion tests. After burnishing test neither specimen developed blisters, lifting or peeling. This satisfies the requirement in paragraph 4.1 of ASTM B571.
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SLIDE 161 However one fell short on thickness and the other was predominantly at the standard thickness with some valleys that showed under the microscope to be less than desirable. Silver coating is discontinous and measured thickness is less than the 2.5 μm minimum thickness specified in ASTM B700. (Average ~ 1 μm) Silver coating is continous and measured thickness is between 1.5 - 5 μm, with a predominant thickness
  • f ~ 2.5 μm.
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SLIDE 162 Then we prepared and plate additional coupons with a longer rub time. They were sent to the lab for evaluation. We were pleased with our test results; again the adhesion test satisfied the standard and the thickness tests came out far exceeding the standards hallmark. Silver coating is continuous and predominant thickness is between 10 and 20 μm.
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SLIDE 163 The information from the testing has been written into a Crown Electric ISO Silver Plating Procedure for use in-house, as well as on customer sites should the need arise. We now have second party laboratory results which show that Crown’s silver plating exceeds the standards and complements the Crown Electric products high standards.
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I guess the point I’m trying to make is –

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Iso Phase Bus may be boring

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But there are engineering differences to be cognizant of

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  • Dew point rated

stand off supports

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  • Dew point rated stand off supports
  • Forced

pressurization should be penalized

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  • Forced pressurization should be penalized
  • Insulator in-situ

visibility and accessibility should be positively evaluated

  • Dew point rated stand off supports
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  • Insulator in-situ visibility and accessibility should

be positively evaluated

  • Welding should be

able to be certified

  • Forced pressurization should be penalized
  • Dew point rated stand off supports
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  • Insulator in-situ visibility and accessibility should

be positively evaluated

  • Welding should be able to be certified
  • Forced pressurization should be penalized
  • Dew point rated stand off supports
  • Enclosures should

have welded raised frames for bolting

  • n covers.
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  • Insulator in-situ visibility and accessibility should

be positively evaluated

  • Welding should be able to be certified
  • Forced pressurization should be penalized
  • Dew point rated stand off supports
  • Enclosures should have welded raised frames for

bolting on covers.

  • Enclosure’s

amperage should be specified

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  • Insulator in-situ visibility and accessibility should

be positively evaluated

  • Welding should be able to be certified
  • Forced pressurization should be penalized
  • Dew point rated stand off supports
  • Enclosures should have welded raised frames for

covers

  • Enclosures amperage should be specified
  • IPB losses should

be evaluated

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Always remember

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