W9127818R0076__Amendment_No._0002.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

This amendment is issued to provide for the follow ing:

1. Amended Draw ings E-210 and E 602 attached.

2. Amended Section 26 24 19.00 26 Motor Control Centers – attached.

Proposal due date remains unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 1

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 17-Aug-2018

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W9127818R0076

X 9B. DATED (SEE ITEM 11)

18-Jul-2018

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 2 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

17-Aug-2018

CODE

ENDIST MOBILE CONTRACTING DIVISION

109 ST JOSEPH ST

MOBILE AL 36602

W91278 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

JH Kerr MCC & 125VDC Systems Replacements 18KE01

SECTION 26 24 19.00 26

MOTOR CONTROL CENTERS

PART 1 GENERAL

1.1 GENERAL

These specifications include the design, fabrication, installation, and commissioning of electrical systems and equipment to replace the existing seven motor control centers at the John H. Kerr powerhouse with new 480VAC motor control centers. Existing motor control centers are designated Auxiliary 460V A-C Distribution Boards 1 through 7. Additional requirements are provided in 26 05 00.00 26 BASIC ELECTRICAL MATERIALS AND METHODS. The section applies to base bid and optional bid items.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASME INTERNATIONAL (ASME)

ASME B1.1 (2003; R 2008) Unified Inch Screw Threads (UN and UNR Thread Form)

ASME B1.20.1 (2013) Pipe Threads, General Purpose (Inch)

ASTM INTERNATIONAL (ASTM)

ASTM B187/B187M (2016) Standard Specification for Copper, Bus Bar, Rod and Shapes and General Purpose Rod, Bar and Shapes

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2017) National Electrical Safety Code

IEEE C37.13 (2015) Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures

IEEE C57.13 (2016) Requirements for Instrument Transformers

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2017) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ICS 1 (2000; R 2015) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 2 (2000; R 2005; Errata 2008) Standard for

SECTION 26 24 19.00 26 Page 1

JH Ker r MCC & 125VDC Syst ems Repl acement s 18KE01

Cont r ol l er s, Cont act or s, and Over l oad Rel ays Rat ed 600 V

NEMA I CS 6 ( 1993; R 2011) I ndust r i al Cont r ol and Syst ems: Encl osur es

NEMA I CS 18 ( 2001; R 2007) Mot or Cont r ol Cent er s

NEMA I CS 5 ( 2017) I ndust r i al Cont r ol and Syst ems:

Cont r ol Ci r cui t and Pi l ot Devi ces

NEMA ST 1 ( 1988; R 1994; R 1997) Speci al t y Tr ansf or mer s ( Except Gener al Pur pose Type)

NATI ONAL FI RE PROTECTI ON ASSOCI ATI ON ( NFPA)

NFPA 70 ( 2017) Nat i onal El ect r i cal Code

UNDERWRI TERS LABORATORI ES ( UL)

UL 44 ( 2014; Repr i nt Feb 2015) Ther moset - I nsul at ed Wi r es and Cabl es

UL 845 ( 2005; Repr i nt Jul 2011) Mot or Cont r ol Centers

UL 1581 ( 2001; Repr i nt Aug 2016) UL St andar d f or Saf et y Ref er ence St andar d f or El ect r i cal Wi r es, Cabl es, and Fl exi bl e Cor ds

1. 3 SUBMI TTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or i nf or mat i on onl y. When used, a desi gnat i on f ol l owi ng t he " G" desi gnat i on i dent i f i es t he of f i ce t hat wi l l r evi ew t he submi t t al f or t he Gover nment . Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00. 00 25, SUBMI TTAL PROCEDURES:

SD- 01 Pr econst r uct i on Submi t t al s

Submi t wi t hi n 60 days af t er Not i ce To Pr oceed:

Tempor ar y Power Pl an; G, HDC

SD- 02 Shop Dr awi ngs

Submi t wi t hi n 75 days af t er Not i ce To Pr oceed:

Out l i ne Dr awi ngs; G, HDC

For coor di nat i on of equi pment and physi cal l ocat i on. Dr awi ngs must i ncl ude t he over al l di mensi ons and wei ght s of t he equi pment ; t he s i ze and l ocat i on of condui t and cabl e ent r ances; det ai l s of pr ovi s i ons f or bol t i ng equi pment t o t he f l oor , wal l s, and cei l i ngs; t he equi pment cr at e s i zes and pr oposed r out i ng t o t he i nst al l at i on s i t e wi t hi n t he facility.

Foundat i ons; G, HDC

SECTI ON 26 24 19. 00 26 Page 2

Assembl y and Det ai l Dr awi ngs; G, HDC

Assembl y and det ai l ed dr awi ngs and dat a t o demonst r at e t hat al l par t s of t he equi pment wi l l conf or m t o t he r equi r ement s and i nt ent of t he speci f i cat i ons. The dr awi ngs and dat a must i ncl ude sect i onal v i ews of mot or cont r ol cent er uni t s, descr i pt i on of r emovabl e el ement s, al l r el ays and ot her devi ces, equi pment l i s t s, and namepl at e schedul es.

Submi t wi t hi n 120 days af t er Not i ce To Pr oceed:

Schemat i c Di agr ams and Connect i on Di agr ams; G, HDC

Schemat i c di agr ams must show t he one l i ne di agr ams of t he mot or cont r ol cent er assembl y, compl et e assembl y f ul l l i ne connect i on di agr am, and cont r ol l ogi c showi ng t hat t he equi pment wi l l f unct i on i n a way t o meet t he r equi r ement s and i nt ent of t he speci f i cat i ons. Al l cont r ol s and ext er nal connect i ons i ndi cat ed by t he cont r act dr awi ngs must be account ed f or . Poi nt t o poi nt connect i on or wi r i ng di agr ams must show al l t er mi nal bl ocks and connect i ons bet ween t he bl ocks and mot or cont r ol cent er equi pment , and must pr ovi de a space at l east 3 i nches bel ow and adj acent t o t he t er mi nal bl ocks i n whi ch ext er nal c i r cui t s, condui t s or connect i ons may be shown. The wi r i ng di agr ams ar e t o be made as seen by an obser ver of t he act ual wi r i ng, and space must be pr ovi ded f or t he addi t i on of devi ces wher e mount i ng space exi st s on t he st r uct ur e. Dr awi ngs must al so show t he pr oposed ar r angement of t er mi nal bl ocks and suppor t s f or i ncomi ng cabl es.

Addi t i onal i nf or mat i on on out goi ng ci r cui t s wi l l be pr ovi ded by t he Gover nment when t he dr awi ngs ar e r ecei ved f or appr oval , and must be added t o t he dr awi ngs by t he Cont r act or .

Submi t no l at er t han 14 days pr i or t o commencement of wor k:

Al t er nat e Feeder Cabl e Rout i ng Pl an; G, HDC

Pl an showi ng r out i ng of new f eeder cabl es f or mot or cont r ol cent er s i f new f eeder cabl es ar e not r out ed usi ng exi st i ng r aceways and cabl e trays.

SD- 03 Pr oduct Dat a

Submi t wi t hi n 60 days af t er Not i ce To Pr oceed:

Mot or Cont r ol Cent er s; G, HDC

Submi t i nf or mat i on on mot or cont r ol cent er s i ncl udi ng al l mol ded case ci r cui t br eaker s, ai r c i r cui t br eaker s, r el ays, accessor i es and cont r ol devi ces, t er mi nal bl ocks. Submi t t he char act er i st i c cur ves of t he i ndi v i dual br eaker t r i p el ement s wi t h suf f i c i ent dat a t o al l ow t he cur ves t o be pr ogr ammed i nt o t he TCC modul e of t he Gover nment ' s SKM Power t ool s f or Wi ndows pr ogr am.

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Spar e Par t s Li st ; G, HDC

Accessor i es And Tool s Li st ; G, HDC

I nf r ar ed ( I R) Vi ewi ng Wi ndows; G, HDC

SECTI ON 26 24 19. 00 26 Page 3

I ndi cat i ng Met er ; G, HDC

Combi nat i on St ar t er s; G, HDC

SD- 06 Test Repor t s

Submi t wi t hi n 75 days af t er Not i ce To Pr oceed:

Desi gn Test Repor t s; G, HDC

Cer t i f i ed copi es of t he r epor t s of al l t est s, i ncl udi ng compl et e t est dat a. The cost s of per f or mi ng al l t est s not pr evi ousl y per f or med wi l l be bor ne by t he Cont r act or and i ncl uded i n t he pr i ces bi d f or t he i t ems of equi pment .

Submi t no l at er t han 30 days pr i or t o t est s:

Fact or y Test Pr ocedur e; G, HDC

Fi el d Accept ance Test Pr ocedur e; G, HDC

Submi t no l at er t han 30 days af t er compl et i on of t est s:

Fact or y I nspect i on and Test Repor t s; G, HDC

Submi t no l at er t han 10 days af t er compl et i on of t est s:

Fi el d Accept ance Test Repor t s; G, HDC

Cer t i f i ed copi es of t he r epor t s of al l t est s, i ncl udi ng compl et e t est dat a. Repor t s of al l wi t nessed t est s wi l l be s i gned by t he wi t nessi ng r epr esent at i ves of t he Cont r act or and t he Cont r act i ng Of f i cer . The cost s of per f or mi ng al l t est s wi l l be bor ne by t he Cont r act or and be i ncl uded i n t he pr i ces bi d f or t he i t ems of equi pment i n t he Schedul es.

SD- 10 Oper at i on and Mai nt enance Dat a

Submi t no l at er t han 90 days pr i or t o compl et i on of wor k:

Oper at i on and Mai nt enance Manual s; G, HDC

Tr ai ni ng Manual s; G, HDC

SD- 11 Cl oseout Submi t t al s

War r ant y; G, HDC

1. 4 GENERAL REQUI REMENTS

1. 4. 1 Gener al

a. Accompl i sh al l coor di nat i on bet ween manuf act ur er s, new mot or cont r ol cent er s, and exi st i ng equi pment , i n or der t o pr ovi de assur ance t o t he Gover nment t hat cr i t i cal r equi r ement s ar e met . Submi t Schemat i c Di agr ams and Connect i on Di agr ams, Assembl y and Det ai l Dr awi ngs, and Out l i ne dr awi ngs as per par agr aph " SUBMI TTALS" of t hi s section.

SECTI ON 26 24 19. 00 26 Page 4

b. Submi t a compl et e set of Oper at i on and Mai nt enance Manual s meet i ng t he r equi r ement s of SECTI ON 01 30 60. 00 25 t o i ncl ude, but not l i mi t ed t o: compl et e manuf act ur er ' s dat a sheet s, br eaker r at i ng cur ves, i nst al l at i on and t r oubl e shoot i ng manual s, par t s l i s t i ngs, and equi pment descr i pt i ons f or al l equi pment i nst al l ed under t hi s cont r act . I nf or mat i on i n t hese manual s must be new and or i gi nal , not copi es. Submi t as per par agr aph " SUBMI TTALS" of t hi s sect i on.

c. Pr ovi de t he war r ant y t o t he Cont r act i ng Of f i cer .

1. 4. 2 Del i ver y, St or age, and Handl i ng

a. Pr ovi de wr i t t en not i f i cat i on t o t he Gover nment 14 cal endar days pr i or t o shi pment of equi pment .

b. Shi p t he mot or cont r ol cent er s as compl et el y assembl ed and wi r ed as f easi bl e. The mot or cont r ol cent er s and any ot her equi pment must be wr apped sui t abl y or ot her wi se pr ot ect ed f r om damage dur i ng shi pment .

Al l el ect r i cal mat er i al del i ver ed t o s i t e, must unt i l i mmedi at el y pr i or t o i nst al l at i on, be pr ot ect ed f r om damagi ng envi r onment al and const r uct i on act i v i t i es. The equi pment must be kept dr y and f r ee f r om pr eci pi t at i on and condensat i on dur i ng st or age, i nst al l at i on, and af t er i nst al l at i on. Al l el ect r i cal equi pment must be st or ed i n compl et el y encl osed cont ai ner s and i n a humi di t y- cont r ol l ed envi r onment . Met hod of on- si t e st or age and st or age cont ai ner s wi l l be subj ect t o appr oval by t he Cont r act i ng Of f i cer . Car ef ul l y package and cl ear l y mar k al l spar e par t s and accessor i es.

1. 4. 3 Qual i f i cat i ons

Each manuf act ur er must have a mi ni mum of 5 year s exper i ence wi t h t he pr oduct i on of equi pment of t he same t ype and r at i ng.

1. 5 MATERI ALS, EQUI PMENT AND I NSTALLATI ON

New mat er i al s and equi pment must be f ur ni shed and any def ect i ve mat er i al or equi pment damaged i n t he cour se of i nst al l at i on must be r epl aced or r epai r ed. Per f or m t est i ng t o check t he i nst al l at i on of and t he pr oper oper at i onal f unct i ons of t he el ect r i cal equi pment . The i nst al l at i ons must be i n accor dance wi t h t he Nat i onal El ect r i cal Code, NFPA 70, and t he Nat i onal El ect r i cal Saf et y Code, I EEE C2, except wher e ot her wi se speci f i cal l y shown or speci f i ed, i n whi ch case t he dr awi ngs and speci f i cat i ons wi l l gover n. Omi ssi on of det ai l s on t he dr awi ngs or i n t he speci f i cat i ons wi l l not be const r ued as per mi t t i ng devi at i ons f r om Code requirements.

1. 5. 1 St andar d Pr oduct s

Ensur e mat er i al and equi pment ar e st andar d pr oduct s of a manuf act ur er r egul ar l y engaged i n t hei r manuf act ur e and essent i al l y dupl i cat e i t ems t hat have been i n sat i sf act or y use f or at l east 2 year s pr i or t o bi d openi ng. Ensur e al l mat er i al s conf or m t o t he r equi r ement s of t hese speci f i cat i ons. Mat er i al s ar e t o be of hi gh qual i t y, f r ee f r om def ect s and i mper f ect i ons, of r ecent manuf act ur e, and of t he c l assi f i cat i on and gr ades desi gnat ed. Ensur e al l mat er i al s, suppl i es, and ar t i c l es not manuf act ur ed by t he Cont r act or ar e t he pr oduct s of ot her r ecogni zed r eput abl e manuf act ur er s.

SECTI ON 26 24 19. 00 26 Page 5

1. 5. 2 Cor r osi on Pr event i on

1. 5. 2. 1 Gener al

Al l equi pment must be pr ot ect ed t o pr event det er i or at i on f r om cor r osi on.

The gener al r equi r ement s ar e speci f i ed bel ow; however , ot her cor r osi on- r esi st i ng t r eat ment s t hat ar e t he equi val ent of t hose speci f i ed may be used.

1. 5. 2. 2 Fast eni ngs and Fi t t i ngs

Scr ews, bol t s, nut s, pi ns, st uds, spr i ngs, washer s and ot her mi scel l aneous f ast eni ng and f i t t i ngs must be of cor r osi on- r esi st ant mat er i al or be t r eat ed i n an appr oved manner t o r ender t hem r esi st ant t o cor r osi on. Al l f ast eni ngs whi ch ar e t o be exposed di r ect l y t o t he weat her must be of cor r osi on- r esi st i ng mat er i al .

1. 5. 2. 3 Cor r osi on- Resi st i ng Mat er i al s

Cor r osi on- r esi st i ng st eel , copper , br ass, br onze, copper - ni ckel - copper al l oys ar e accept abl e cor r osi on- r esi st i ng mat er i al s.

1. 5. 2. 4 Fi ni sh

Fi nal pai nt i ng i s t o be done i n accor dance wi t h par agr aph " PAI NTI NG" .

PART 2 PRODUCTS

2. 1 MATERI ALS

2. 1. 1 Gener al

a. The mot or cont r ol cent er s and associ at ed equi pment f ur ni shed and t he wor k per f or med under t hi s cont r act must be i n conf or mance wi t h t he appl i cabl e pr ovi s i ons of ANSI & I EEE st andar ds. Fur ni sh document at i on subst ant i at i ng t hat t he equi pment desi gns and assembl i es ar e ANSI cer t i f i ed and UL Li st ed.

b. Al l mat er i al s, component s, and equi pment must conf or m t o t he r equi r ement s of t hese speci f i cat i ons. Mat er i al s, component s, and equi pment must be f r ee f r om def ect s and i mper f ect i ons, of r ecent manuf act ur e, and have mechani cal and el ect r i cal pr oper t i es sui t abl e f or t he i nt ended use. Al l mat er i al s, component s, and equi pment not manuf act ur ed by t he Cont r act or must be pr oduct s of ot her r ecogni zed r eput abl e manuf act ur er s meet i ng t he r equi r ement s of par agr aph " QUALI FI CATI ONS" . I nsof ar as pr act i cabl e, devi ces and equi pment used f or t he same or s i mi l ar ser vi ces must be of t he same make and t ype, and be i nt er changeabl e when of t he same r at i ng.

c. Pr ovi de equi pment conf or mi ng t o t he r equi r ement s of NFPA 70 unl ess mor e st r i ngent r equi r ement s ar e i ndi cat ed her ei n or shown. NEMA r at ed and UL l i s t ed equi pment has been speci f i ed when avai l abl e. Equi pment t o meet NEMA and UL const r uct i on and r at i ng r equi r ement s as speci f i ed. No equi val ent wi l l be accept abl e. I mmedi at el y not i f y t he Cont r act i ng Of f i cer of any r equi r ement s of t he speci f i cat i ons or pr oposed mat er i al s or assembl i es t hat do not compl y wi t h UL or NEMA.

I nt er nat i onal El ect r ot echni cal Commi ssi on ( I EC) r at ed equi pment wi l l not be consi der ed an accept abl e al t er nat i ve t o speci f i ed NEMA r at i ngs.

SECTI ON 26 24 19. 00 26 Page 6

2. 1. 2 Devi ce Ar r angement

Power cabl es i n condui t wi l l ent er t he mot or cont r ol cent er s f r om t he t op, bot t om, and si de as shown on t he cont r act dr awi ngs. Mot or cont r ol cent er ver t i cal sect i ons must f i t t he exi st i ng concr et e pads unl ess ot her wi se appr oved. The pr ef er r ed ar r angement i s i ndi cat ed on t he cont r act dr awi ngs; ot her pr oposed ar r angement s may be appr oved. Bot t oms must be open t o t he maxi mum ext ent pr act i cabl e t o al l ow f or var i at i ons i n cabl e ent r y f r om exi st i ng embedded condui t s. Any pr oposed devi at i on f r om t hi s ar r angement must be submi t t ed t o t he Cont r act i ng Of f i cer f or appr oval . The desi gn of t he mot or cont r ol cent er s and ar r angement of devi ces must be such t hat adequat e space i s pr ovi ded f or i nspect i on and mai nt enance of wi r i ng, t er mi nal s, and devi ces. Equi pment on t he r ear of t he panel s must be so mount ed t hat t he st uds of t he equi pment mount ed on t he f r ont of t he panel s wi l l be accessi bl e wi t hout r emovi ng any devi ce. Mot or cont r ol cent er s must be desi gned f or f r ont access onl y.

2. 1. 3 Connect i ons

Al l bol t s, st uds, machi ne scr ews, nut s, and t apped hol es ar e t o be i n accor dance wi t h ASME B1. 1. Thr eads f or s i zes 1/ 4 i nch t o 1 i nch, i ncl usi ve, must be NC or UNC ser i es. The si zes and t hr eads of al l condui t and f i t t i ngs, t ubi ng and f i t t i ngs, and connect i ng equi pment must be i n accor dance wi t h ASME B1. 20. 1. Manuf act ur er ' s st andar d t hr ead and const r uct i on may be used on smal l i t ems whi ch, i n t he opi ni on of t he Cont r act i ng Of f i cer , ar e i nt egr al l y r epl aceabl e, except t hat t hr eads f or ext er nal connect i ons t o t hese i t ems must meet t he above r equi r ement s.

2. 2 MOTOR CONTROL CENTERS

Except as ot her wi se speci f i ed or i ndi cat ed, t he desi gn, const r uct i on and t est s of t he mot or cont r ol cent er s must conf or m t o t he appl i cabl e r equi r ement s of NEMA I CS 1, NEMA I CS 2, NEMA I CS 6, NEMA I CS 18, UL 845 I EEE C37. 13, and NFPA 70. The mot or cont r ol cent er s ar e t o be of t he t ot al l y- encl osed, f r ee- st andi ng, dead- f r ont t ype, bui l t on a f r amewor k of st r uct ur al st eel . Desi gn each mot or cont r ol cent er f or oper at i on on a 480VAC, 3- phase, 3 wi r e, 60Hz syst em. The f r amewor k and st r uct ur e must be suf f i c i ent l y r i gi d t o wi t hst and oper at i on of t he equi pment or any st r esses due t o shor t c i r cui t s. The mot or cont r ol cent er s ar e t o have i nst r ument s, cont r ol accessor i es, r el ayi ng, and ot her equi pment mount ed on t he f r ont panel s and i nsi de t he mot or cont r ol cent er s as shown and as speci f i ed.

Out l i ne dr awi ngs, assembl y and det ai l dr awi ngs, schemat i c di agr ams and connect i on di agr ams must be pr epar ed and submi t t ed as descr i bed i n par agr aph " SUBMI TTALS" . Pr ovi de NEMA Cl ass I I Type C mot or cont r ol cent er s i n accor dance wi t h NEMA I CS 18.

2. 2. 1 Encl osur e And Fr amewor k

a. Each mot or cont r ol cent er consi st s of t he r equi r ed number of ver t i cal sect i ons of 90 i nches nomi nal hei ght , bol t ed t oget her , wi t h st eel channel s i l l s and sui t abl e f or mount i ng agai nst a wal l .

Ver t i cal sect i on i s 20- i nches deep and buses, cont r ol wi r i ng, cont r ol t r ansf or mer s, smal l power t r ansf or mer s, t er mi nal bl ocks, l i ne t er mi nal s, cabl e suppor t s, wi t h c l amps accessi bl e f r om t he f r ont .

Encl osur e i s NEMA Type 1 wi t h gasket ed uni t and wi r eway door s.

Fabr i cat e t he cont r ol cent er s f r om smoot h sel ect st eel sheet s shaped and r ei nf or ced t o f or m r i gi d f r ee- st andi ng st r uct ur es. Met al t hi ckness f or encl osur es cannot be l ess t han speci f i ed i n NEMA I CS 6 wi t hout except i on. Fabr i cat e and bol t ver t i cal edges of sect i ons

SECTI ON 26 24 19. 00 26 Page 7 exposed t o v i ew so t hat t he j oi nt s do not pass a 1/ 16 i nch gage.

Desi gn each st r uct ur e f or addi t i on of f ut ur e sect i ons r equi r ed.

I sol at e i ndi v i dual compar t ment s f r om adj acent compar t ment s. Make pr ovi s i ons f or l evel i ng t he ent i r e assembl ed mot or - cont r ol cent er sect i ons and bol t i ng t hem t oget her so t hat t hey f or m a cont i guous st r uct ur al encl osur e. The f r ont out si de sur f aces must not be dr i l l ed or wel ded f or t he pur pose of at t achi ng wi r es or mount i ng devi ces i f such hol es or f ast eni ngs wi l l be v i s i bl e f r om t he f r ont .

b. Vent i l at i ng openi ngs may be r equi r ed, pr ef er abl y of t he gr i l l e t ype. Al l vent i l at i ng openi ngs must be pr ovi ded wi t h cor r osi on- r esi st ant i nsect - pr oof scr eens on t he i nsi de.

c. Pr ovi de 7 gage l i f t i ng angl es on t he t op of each sect i on, ext endi ng t he ent i r e wi dt h of t he sect i on, capabl e of suppor t i ng t he ent i r e wei ght of t he mot or - cont r ol cent er sect i on wi t hout di st or t i on.

Pr ovi de base channel s wi t h hol es t o f aci l i t at e f l oor mount i ng and leveling.

2. 2. 2 Uni t Compar t ment s

a. Pr ovi de each oper at i ng uni t wi t h equi pment as shown on t he dr awi ngs, mount ed i n an i ndi v i dual cel l . The uni t assembl y, except mai n c i r cui t br eaker s and auxi l i ar y cont r ol devi ces, i s dr awout t ype r emoved f r om t he f r ont , wi t hout r ear access or di st ur bi ng ot her uni t s i n t he cont r ol cent er assembl y. Ensur e al l dr awout t ype uni t assembl i es have a posi t i ve gui de r ai l syst em t o ensur e al i gnment of connect i on t o ver t i cal bus. Mechani cal l y i nt er l ock uni t s wi t h t he door t o pr event r emoval whi l e t he br eaker i s i n t he ener gi zed ( ON/ CLOSED) posi t i on. Pr ovi de each r emovabl e uni t wi t h a pr ovi s i on f or padl ocki ng i n a posi t i on i n whi ch i t i s di sconnect ed f r om t he ver t i cal bus, al t hough not r emoved f r om t he st at i onar y st r uct ur e.

Pr ovi de al l vent i l at i ng openi ngs wi t h cor r osi on- r esi st ant i nsect - pr oof scr eens on t he i nsi de. Pr ovi de bus cl osi ng pl ugs f or al l unused openi ngs i n ver t i cal bus bar r i er s.

b. Compar t ment s i ze shal l be mi ni mi zed t o maxi mi ze t he number of spar e compar t ment s. Ensur e compar t ment s f or f ut ur e combi nat i on mot or - cont r ol uni t s ar e compl et e wi t h har dwar e, buses, and hi nged door s r eady t o r ecei ve f ut ur e dr aw- out uni t s. Compar t ment s f or spar e combi nat i on mot or - cont r ol uni t s ar e compl et e wi t h buses, hi nged door s, and dr aw- out uni t s but wi t hout l oad t er mi nal connect i ons. Spar e spaces ar e compl et e wi t h buses and scr ewed- on f r ont cover pl at es.

2. 2. 3 Mot or Cont r ol Cent er Door s and Cover s

Pr ovi de each uni t compar t ment , i ncl udi ng bl ank compar t ment s f or f ut ur e use, wi t h ei t her a f l ange- f or med or a r ol l ed- edge door . Mount each door on f ul l y- conceal ed or cont i nuous f ul l - l engt h pi ano- t ype hi nges and pr ovi de wi t h posi t i ve f ast ener s. Pr event door sag by pr oper al i gnment of hi nges made of suf f i c i ent l y st r ong mat er i al . I nt er l ock t he door f ast eni ngs t o pr event openi ng when t he equi pment i s ener gi zed. Ensur e t he ext er nal oper at i ng handl e c l ear l y i ndi cat es whet her t he equi pment i s i n an " ON" , " OFF" or " TRI PPED" posi t i on. Pr ovi de means f or each ext er nal oper at i ng handl e t o be l ocked wi t h t he cor r espondi ng ci r cui t br eaker i n t he open " OFF" posi t i on. The l ocki ng means must al l ow f or use of a st andar d padl ock al one t o l ock t he c i r cui t br eaker wi t hout t he need f or use of an assi st i ng l ockout devi ce ( hasp, cover , cabl e l ock, et c. )

SECTI ON 26 24 19. 00 26 Page 8

2. 2. 3. 1 I nf r ar ed ( I R) Vi ewi ng Wi ndows

Pr ovi de I nf r ar ed ( I R) v i ewi ng wi ndows on mot or cont r ol cent er door s and cover s t o al l ow i nf r ar ed sensi ng of each mai n br eaker l i ne and l oad si de t er mi nal connect i ons under l oad condi t i ons wi t hout havi ng t o open t he encl osur e. Wi ndows must f eat ur e a r emovabl e st eel or al umi num secur i t y cover over a 4- i nch ( nomi nal ) s i ght gl ass. Wi ndows must be on t he f r ont or t he encl osur e as r ecommended by t he manuf act ur er f or opt i mum vi ewi ng.

Wi ndows must al so be pr ovi ded f or each mai n br eaker , unl ess t he mot or cont r ol cent er manuf act ur er can show t hat such i nst al l at i on i s i mpr act i cal due t o t he desi gn of t he bus- br eaker connect i ons. The i nf r ar ed wi ndows must be t he swi t chgear manuf act ur er ' s st andar d pr oduct , or a t hi r d- par t y pr oduct t hat i s UL l i s t ed and ar c- f l ash t est ed t o t he symmet r i cal shor t c i r cui t r at i ng of t he br eaker s or hi gher and i nst al l ed wi t h t he coor di nat i on and appr oval of t he mot or cont r ol cent er manuf act ur er at t he manuf act ur er ' s f aci l i t y .

2. 2. 4 Hor i zont al Wi r eways

Pr ovi de a st r uct ur e wi t h a mi ni mum 6- i nches hi gh wi r eway at t he t op and a 9- i nches mi ni mum wi r eway at t he bot t om. Bot h hor i zont al wi r eways t o r un t he l engt h of t he st r uct ur e. Pr ovi de a mast er t er mi nal bl ock compar t ment wi t h f ul l l engt h wi r eway space at t he t op and bot t om.

2. 2. 5 Ver t i cal Wi r eways

Pr ovi de ver t i cal wi r eways on t he r i ght s i de of al l ver t i cal sect i ons accept i ng mul t i pl e pl ug- i n component s. Ver t i cal wi r eways must be a mi ni mum of 4 i nches wi de. I sol at e wi r eways f r om t he hor i zont al and ver t i cal buses. Pr ovi de ver t i cal wi r eways wi t h hi nged cover s.

2. 2. 6 Si l l s

Fur ni sh channel i r on f oundat i ons, compl et e wi t h bol t s and dr i l l ed hol es f or gr out i ng and anchor i ng t o t he f l oor , f or t he compl et e l engt h ( f r ont and r ear ) of each mot or cont r ol cent er assembl y. Desi gn t he channel s f or f l at mount i ng, maxi mum channel dept h i s 1- 1/ 2 i nches. Pr ovi de addi t i onal channel or subst ant i al met al t r i m f l ush wi t h t he end panel s t o compl et el y encl ose t he bases acr oss t he ends of t he equi pment assembl i es

2. 2. 7 Buses And Connect i ons

Copper bar s and shapes f or mai n bus and gr ound bus conduct or s must conf or m t o t he r equi r ement s of ASTM B187/ B187M, 600 amper es mai n/ hor i zont al buses and t r ansf er buses, 300 amper e br anch/ ver t i cal buses. Al l pr i mar y connect i ons i ncl udi ng t he power connect i ons t o t he l i ne s i de of t he c i r cui t br eaker s must be by bus bar . Base t he bus r at i ngs on a 65 degr ee Cel si us maxi mum t emper at ur e r i se i n accor dance wi t h UL 845 r equi r ement s.

Ensur e t he buses have a shor t c i r cui t r at i ng of not l ess t han 65, 000 RMS symmet r i cal amper es. Shop spl i ces and t ap connect i ons must be br azed, pr essur e- wel ded, or bol t ed. Al l spl i ces f or f i el d assembl y must be bol t ed. Wher e bol t ed connect i ons ar e used, cont act sur f aces must be si l ver - or t i n- pl at ed. The buses ar e t o be mount ed on i nsul at i ng suppor t s of wet pr ocess por cel ai n, gl ass pol yest er , or sui t abl e mol ded mat er i al .

2. 2. 7. 1 Hor i zont al Bus

Pr ovi de each cont r ol cent er assembl y wi t h a t hr ee- phase mai n hor i zont al bus, wi t h a cont i nuous cur r ent r at i ng not l ess t han 600 amper es, l ocat ed

SECTI ON 26 24 19. 00 26 Page 9 across the top of each vertical section. Fully insulate the main horizontal bus.

2.2.7.2 Vertical Bus

Provide each vertical section with a three-phase vertical bus with a continuous current rating of not less than 300 amperes connected to the horizontal bus by brazing, welding, or bolting. Where the incoming feeder breakers are located at the bottom of a control center, rate the vertical bus in that section the same as the main horizontal bus. Extend vertical buses from the horizontal bus to the bottom of the lowest available unit mounting space. Isolate the vertical bus from wireways and equipment in compartments.

2.2.7.3 Ground Bus

The motor control center assembly must have a full-length interior ground bus bar to which the housing, framework, cable supports, bus supports, and non-current carrying metallic parts of all equipment and conduits is grounded to insofar as practicable. Ensure ground bus is capable of carrying the rated short-circuit current available in the motor-control center.

2.2.8 Shutters

Provide the vertical buses with shutter mechanisms which close when a unit is withdrawn to isolate the vertical bus. Stabs on the back of the drawout units must open the shutters to engage the vertical bus.

2.2.9 Circuit Breakers

Circuit breakers must meet the requirements or air circuit breakers and molded case circuit breakers as applicable, as specified in Section 26 05 00.00 26 BASIC ELECTRICAL MATERIALS AND METHODS. Provide an arc flash hazard reduction (maintenance mode) switch and indicating light for each main breaker on the cubicle door as shown in the contract drawings..

Provide manual mechanical interlocks between the main breaker as indicated on drawings. Each mechanical interlock shall prevent the capability from being switched to the ON/CLOSED position.

2.2.9.1 Trip Units

Except as otherwise noted, provide the circuit breakers, of frame sizes and the trip unit ratings as shown on the drawings, with combination thermal and instantaneous magnetic or solid state trip units. The Government reserves the right to change the indicated trip ratings, within frame limits, of the trip devices at the time the schematic diagrams and connection diagrams are submitted for approval. Provide interchangeable breaker trip units and the instantaneous magnetic trip units that are adjustable on frame sizes larger than 150 amperes. Solid state trip units, where indicated, also have adjustable long time pick-up and delay, short time pick-up and delay, and instantaneous pick-up. Nonadjustable instantaneous magnetic trip units shall be set at approximately 10 times the continuous current ratings of the circuit breakers.

2.2.9.2 Arc Flash Hazard Reduction System

Provide an arc flash hazard reduction system on all main breakers. When enabled, the arc flash hazard reduction system must reduce the

SECTION 26 24 19.00 26 Page 10 instantaneous trip time to reduce the arc flash hazard when performing maintenance on the motor control center. Enabling and disabling of the arc flash hazard reduction system must be accomplished from outside the compartment door via a maintained selector switch with separate or integral indication blue lamp that illuminates when the system is enabled.

Provide an adjustable trip time with the arc flash hazard reduction system.

2.2.9.3 Ratings

Rate circuit breakers for 480-volt or 277/480-volt AC circuits 600 volts AC, and have an UL listed minimum interrupting capacity of 65,000 symmetrical amperes at 600 volts AC. Rate circuit breakers for 120-volt AC circuits not less than 120/240 or 240 volts AC, and have a UL listed minimum interrupting capacity of 10,000 symmetrical amperes.

2.2.10 Wiring

In addition to the requirements for Special Wire and Cable in SECTION 26 05 19.00 26, motor control center wiring must meet the following requirements:

a. All control wire, including wire for removable elements, must be stranded copper switchboard wire with 600 volt insulation, type SIS as listed in NFPA 70 . The wire must comply with the requirements of UL 44 and must pass the VW-1 flame test of UL 1581 . Hinge wire must have Class K stranding. Current transformer secondary leads may be not smaller than No. 10 AWG. Minimum wire size for all other control wiring is No. 14 AWG.

b. Provide a suitable wiring duct system for all inter-panel wiring with easy access for inspection and replacement of wiring. All wiring must be installed in wiring channels and ducts as far as possible.

Each wire must be properly protected where it leaves a channel or duct.

c. Wiring, where not installed in channels or ducts, must be formed into compact wire bundles suitably bound together and properly supported. Bindings and supports may not cause damage or cold flow of the insulation. Groups of exposed wires are to be run straight horizontally or vertically with short-radius right-angle bends.

Wiring supports are to be of heavy-gage rustproof material or steel with rust-resisting finish equivalent to sherardizing or cadmium-zinc plating. There must be no splices in the wiring. All connections are be made at terminal studs or terminal blocks with ring-tongue indented terminals. All screw terminals must have toothed lockwashers and all stud terminals must have contact nuts and either locking nuts or lockwashers. Each conductor must be identified at each end with a permanently machine-embossed black identification on white plastic tubular shrink-on marker and as shown on the connection diagram terminal blocks.

d. Terminal blocks and internal wiring must be provided to all breaker spare auxiliary contacts and control device spare contacts for the connection of remote circuits. Terminal blocks must be provided to terminate all external cables and contain at least 10 percent spare terminals. Make suitable provisions for training and supporting incoming cables from the point of entrance to their termination on terminal blocks. All terminal blocks must be accessible from the front of the motor control center unit with the front door open and the circuit breaker in the operate position. Drawings showing the

SECTION 26 24 19.00 26 Page 11 proposed arrangement of terminal blocks and supports for incoming cables are to be submitted for approval.

e. Special attention must be given to wiring and terminal arrangement to permit the individual conductors of an external cable to be conveniently grouped for connection to adjacent terminal points.

Suitable entrance locations are to be indicated on the Contractor's shop drawings for entrance of all external control cables.

f. The wire or terminal point designations used on the Contractor's wiring diagrams and printed on terminal block marking strips may be according to the Contractor's standard practice; however, additional wire and cable designations for identification of remote or external circuits are required, and drawings submitted for approval will be so marked and returned to the Contractor for additional designations.

Drawings may require revision of external circuit connections, terminal and wire designations and wire grouping when submitted for approval.

2.2.11 Terminals And Installation

a. Control wiring within the assembly housings must be furnished and installed by the Contractor. All new control wiring leaving equipment must be run to and terminated on terminal blocks. Terminal blocks and internal wiring must be provided as required for connection of existing circuits to all spare auxiliary and alarm contacts, annunciators, control switches, and pilot devices and indicating lights where such devices are specified or existing and applicable to the equipment involved. There may be no splices in the wiring and all connections must be made at terminal blocks. Terminal blocks are to be added for wiring to existing devices having leads instead of terminals. All screw terminals must have toothed lock washers and all stud terminals must have contact nuts and either locking nuts or lock washers.

b. All external control cables and power cables must enter the motor control centers as shown on the drawings.

2.2.12 Terminal Blocks

Terminal blocks must conform to the requirements of Section 26 05 00.00 26, BASIC ELECTRICAL MATERIALS AND METHODS.

2.2.13 Nameplates

Each item of equipment mounted on the motor control center which does not have a suitable designation included as an integral part of the device must be provided with an engraved nameplate or with other approved suitable means of identification. Each operating unit door or panel must be provided with an identifying nameplate approximately 1 by 3 inches in size. A master nameplate approximately 3 by 5 inches in size must also be provided for the complete assembly. Nameplates are as per Section

26 05 00.00 26, BASIC ELECTRICAL MATERIALS AND METHODS.

2.2.14 Foundations

New foundations and equipment pads are required to provide level mounting channels wherever existing pads are not reused. New foundations must comply with Section 03 60 00.00 26 CONCRETE DEMOLITION AND REPAIR, and

SECTION 26 24 19.00 26 Page 12

Section 13 48 00.00 26, SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT. Existing foundations may be reused or modified as recommended by the motor control center manufacturer to accommodate the replacement equipment. Existing foundations not being reused must be removed flush with the powerhouse floor and repaired as per Section 03 60 00.00 26, CONCRETE DEMOLITION AND REPAIR prior to installing the motor control center manufacturer's recommended foundation. Anchorage must be as per Section 13 48 00.00 26, SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT. All foundations must be suitable for the dynamic switching forces of the circuit breaker and the specified seismic forces. Seismic Equipment Certification must be submitted per Section 13 48 00.00 26, SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT.

2.2.15 Operating Units

Each operating unit will consist of a molded-case air circuit breaker, or a combination motor starter, and other devices as required, mounted in an individual cell unit with an individual unit terminal block. Each unit assembly must be so constructed that it can be easily removed from its compartment after disconnecting the wires to the terminal block and sliding the unit forward to disengage a switchjaw type or similar approved type of disconnecting device for the power connection to the vertical bus. Operating units containing individual transformers and auxiliary control devices may be of stationary construction. The disconnecting device must be designed and constructed to ensure maintenance of adequate contact area and pressure. Removal of a unit assembly must be practicable without access to the rear of the vertical section, and without disturbing any other unit in the control center assembly. Provide suitable means for supporting and aligning the units during their removal or replacement.

Each removal unit must have provision for padlocking in a position in which it is disconnected from the vertical bus although not removed from the stationary structure.

2.2.16 Combination Starters

Provide a submittal for combination starters. Combination motor controller units are to contain motor circuit protectors, auxiliary and pilot devices and a magnetic contactor with a solid state overload relay except as noted on drawings. All combination motor controller units must have short circuit ratings equal to 65,000 amperes or greater at 480VAC. All combination starters must be fully rated; series rated components will not be approved. Where control push-buttons, indicating lamps, selector switches, and similar control devices are associated with a unit, they must be mounted on the unit compartment door. Molded case circuit breakers for use in combination starters meet the requirements of paragraph entitled, "Molded Case Circuit Breakers," of this section. Door-mounted components must not interfere with access within the compartments. Motor circuit protectors may be only part of the combination starters as required by NFPA 70 and trip units must have provision for locking the selected trip setting.

2.2.17 Magnetic Contactors

The rating, performance and service characteristics must conform to the requirements of NEMA ICS 2 for contactors with continuous current ratings for the duty indicated. Contactors for motor control must be rated for full-voltage starting (Class A controllers). Contactors must be suitable for at least 200,000 complete operations under rated load without more than routine maintenance. The interruption arc and flame must be minimized

SECTION 26 24 19.00 26 Page 13 by suitable arc chutes or other means so that no damage will be done to other portions of the device. The arc chutes, if provided, must be easily removable without removing or dismantling other parts. The contacts must be easily removable. All current-carrying contact surfaces must be silver-surfaced or of other approved material to prevent the formation of high resistance oxides. The contactor must operate without chatter or perceptible hum while energized. Coils must be suitable for continuous operation on 120-volt AC circuits. Alternating-current contactors must be three-pole, except where otherwise noted, and be insulated for 600 volts AC and of the electrically-operated, magnetically-held type adequate for full-voltage motor starting service. All magnetic contactors must operate at 90 percent of rated voltage.

2.2.18 Control Transformers

Control transformers for starter units are to be rated 480-120 volts and must conform to requirements for control transformers in NEMA ST 1 .

Control transformers must have adequate volt-ampere capacity for the control functions indicated and an additional 10 percent capacity. Provide each control transformer a fuse in one secondary lead and ground the other secondary lead grounded. Install transformers with primary fuses as required. The unit disconnect must be equipped with a normally open contact to isolate the control circuit from the source when the controller disconnect is open.

2.2.19 Auxiliary Contacts

Each controller must be provided with a minimum of two auxiliary contacts which can be easily changed from normally open to normally closed.

2.2.20 Overload Relays

Except as otherwise indicated, each combination starter must be provided with a solid state overload relay. Provide the overload relay with an external manual reset operable without opening the compartment door. The overload relay must have selectable trip classes between NEMA Class 10 and 20 or have selectable trip classes of NEMA class 10, 20, and 30. Overload relays must protect against motor overload, phase loss, phase imbalance, and ground fault; upon sensing one of these faults, the relay de-energizes the starter.

2.2.21 Control Circuit Disconnects

Control circuit power must disconnect when the unit compartment is opened.

2.2.22 Motor Circuit Protectors

The motor circuit protectors when used in combination with motor starters must be capable of withstanding and interrupting fault currents of 65,000 amperes symmetrical at 600 volts when tested as a unit. All motor circuit protectors must be fully rated; series rated components will not be approved. Personnel safety line terminal shields must be provided for each motor circuit protector. Trip units must have provision for locking the selected trip setting. The motor circuit protector must be the product of only one manufacturer and be interchangeable when of the same frame size.

2.3 ACCESSORIES AND CONTROL DEVICES

Provide control accessories, suitable for mounting on the front of, or

SECTION 26 24 19.00 26 Page 14 inside, the control centers as indicated on the drawings. Control accessories to meet the applicable requirements of NEMA ICS 2 . Mount relays and other equipment so that mechanical vibration does not cause false operation.

2.3.1 Control Stations

Ensure push-button stations and selector switches conform to NEMA ICS 2 , are of the heavy-duty, oil-tight type, rated 600 volts ac, and have a contact rating designation of A600. Provide switches with escutcheon plates clearly marked to show operating positions.

2.3.2 LED Indicating Lights

Furnish red LEDs where shown on the drawings, indicating contact "closed" position. The LEDs must be readily accessible and replaceable from the front of the control center through a finished opening in the compartment door. The LED assemblies must be the heavy duty oiltight, watertight, and dusttight type.

2.3.3 Control Relays

Control relays must be the electrically operated, magnetically held, self-reset, open type, suitable for mounting inside the starter compartments, and be rated 120-volt ac. Contacts must be as indicated on the drawings and have a contact rating designation of A600, in accordance with NEMA ICS 5 .

2.4 INDICATING METERS

At the load side of each main breaker, provide a microprocessor based power indicating meter as shown on Contract drawings. The meter must provide true RMS measurements of phase currents, phase to phase voltages, and phase to neutral voltages. The meter must display measured values using a minimum 0.5 inch LED or LCD screen. Unless otherwise indicated, electrical indicating instruments are to be of the semi-flush, back-connected, and dustproof. All meter inputs and outputs must be galvanically isolated to a minimum of 2000 VAC. The accuracy of the power meter must be within 1 percent for all measurements. The meter must be programmable for use with any potential transformer or current transformer ratio. Provide all instrument transformers needed for meters. The meter must have MODBUS RTU, MODBUS ASCII, and 4-20 mA communications capabilities. The meter must be capable of using 4-20mA signals for voltage and current readings. Provide a 24 VDC power supply in the same compartment as the meter to provide a loop power source for the 4-20mA signals.

2.4.1 Instrument Transformers

Provide all instrument transformers needed for meters. Ensure all transformers used for metering meet the requirements of IEEE C57.13 .

Protect voltage transformers with removable primary and secondary fuses.

Install fuses in each ungrounded lead and located adjacent to the transformers in an accessible location. If cable connections to current transformer primary are required, furnish terminals of an approved solderless type and proper size. If current transformers are connected to buses, furnish proper connections complete with bolts, nuts, washers, and other accessories.

SECTION 26 24 19.00 26 Page 15

2.4.2 DC Power Supplies

Provide a 24 volt DC power supply for each indicating meter that can supply at least 2 amps and is NEC class 2 for the 4-20 mA signals. Install removable fuses in an accessible location to the AC power input of the supply.

2.4.3 4-20mA Signal Wire

Provide FEP-insulated 24 AWG (or larger) twisted-pair individually-shielded copper communication wire from each indicating meter to the SCADA cabinet located within the control room. Provide a minimum of four wire pairs for each meter. Note that some motor control centers have two meters. Utilize existing cable tray and spare conduit to route the cable. Two wire pairs are to be connected to the powerhouse SCADA system 4-20mA input card for each meter: one for voltage and one for current.

Label the remaining wire pairs as spares. Coordingate with the Government for final termination at the SCADA cabinet located in the control room.

2.5 PAINTING

Metal surfaces of the motor control center assemblies and motor control centers must be finished and painted in accordance with the manufacturer's standard practices.

2.6 FACTORY INSPECTION AND TESTS

2.6.1 General

a. Each item of equipment supplied under this contract must…