26 28 01.00 10.pdf

Ti nker AFB, OK TAFB Techni cal Spr ci f i cat i ons 2019

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COORDI NATED POWER SYSTEM PROTECTI ON

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

I NSTI TUTE OF ELECTRI CAL AND ELECTRONI CS ENGI NEERS ( I EEE)

I EEE 242 ( 2001; Er r at a 2003) Recommended Pr act i ce f or Pr ot ect i on and Coor di nat i on of I ndust r i al and Commer ci al Power Syst ems - Buf f Book

I EEE 399 ( 1997) Br own Book I EEE Recommended Pr act i ce f or Power Syst ems Anal ysi s

I EEE C2 ( 2012; Er r at a 1 2012; I NT 1- 4 2012; Er r at a

2 2013; I NT 5- 7 2013; I NT 8- 10 2014; I NT

11 2015; I NT 12 2016) Nat i onal El ect r i cal Saf et y Code

I EEE C37. 13 ( 2015) St andar d f or Low- Vol t age AC Power Ci r cui t Br eaker s Used i n Encl osur es

I EEE C37. 16 ( 2009) St andar d f or Pr ef er r ed Rat i ngs, Rel at ed Requi r ement s, and Appl i cat i on Recommendat i ons f or Low- Vol t age AC ( 635 V and bel ow) and DC 3200 V and bel ow) Power Ci r cui t Br eaker s

I EEE C57. 13 ( 2008; I NT 2009) St andar d Requi r ement s f or I nst r ument Tr ansf or mer s

NATI ONAL ELECTRI CAL MANUFACTURERS ASSOCI ATI ON ( NEMA)

NEMA C37. 50 ( 2012) Amer i can Nat i onal St andar d f or Swi t chgear - - Low- Vol t age AC Power Ci r cui t Br eaker s Used i n Encl osur es - Test Procedures

NEMA FU 1 ( 2012) Low Vol t age Car t r i dge Fuses

NEMA I CS 1 ( 2000; R 2015) St andar d f or I ndust r i al Cont r ol and Syst ems: Gener al Requi r ement s

NEMA I CS 2 ( 2000; R 2005; Er r at a 2008) St andar d f or Cont r ol l er s, Cont act or s, and Over l oad Rel ays Rat ed 600 V

NEMA I CS 3 ( 2005; R 2010) Medi um- Vol t age Cont r ol l er s

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Rat ed 2001 t o 7200 V AC

NEMA I CS 6 ( 1993; R 2011) Encl osur es

NEMA/ ANSI C12. 11 ( 2007) I nst r ument Tr ansf or mer s f or Revenue Met er i ng, 10 kV BI L t hr ough 350 kV BI L ( 0. 6 kV NSV t hr ough 69 kV NSV)

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

NFPA 70 ( 2014; AMD 1 2013; Er r at a 1 2013; AMD 2 2013; Er r at a 2 2013; AMD 3 2014; Er r at a 3- 4 2014; AMD 4- 6 2014) Nat i onal El ect r i cal Code

UNDERWRI TERS LABORATORI ES ( UL)

UL 1203 ( 2013; Repr i nt Apr 2015) UL St andar d f or Saf et y Expl osi on- Pr oof and Dust - I gni t i on- Pr oof El ect r i cal Equi pment f or Use i n Hazar dous ( Cl assi f i ed) Locat i ons

UL 198M ( 2003; Repr i nt Feb 2013) St andar d f or Mi ne- Dut y Fuses

UL 486E ( 2009; Repr i nt May 2013) Equi pment Wi r i ng Ter mi nal s f or Use wi t h Al umi num and/ or Copper Conduct or s

UL 489 ( 2013; Repr i nt Mar 2014) Mol ded- Case Ci r cui t Br eaker s, Mol ded- Case Swi t ches, and Ci r cui t - Br eaker Encl osur es

UL 508 ( 1999; Repr i nt Oct 2013) I ndust r i al Cont r ol Equi pment

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

1. 2 SUBMITTALS

Gover nment appr oval i s r equi r ed f or al l submi t t al s. Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 03 Pr oduct Dat a

Faul t Cur r ent Anal ysi s Pr ot ect i ve Devi ce Coor di nat i on St udy Equipment Syst em Coor di nat or Pr ot ect i ve Rel ays Installation

SD- 06 Test Repor t s

Fi el d Test i ng

SD- 07 Cer t i f i cat es

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1. 3 QUALI TY ASSURANCE

1. 3. 1 Syst em Coor di nat or

Syst em coor di nat i on, r ecommended r at i ngs and set t i ngs of pr ot ect i ve devi ces, and desi gn anal ysi s shal l be accompl i shed by a r egi st er ed pr of essi onal el ect r i cal power engi neer wi t h a mi ni mum of 3 year s of cur r ent exper i ence i n t he coor di nat i on of el ect r i cal power syst ems.

Submi t ver i f i cat i on of exper i ence and l i cense number , of a r egi st er ed Pr of essi onal Engi neer as speci f i ed above. Exper i ence dat a shal l i ncl ude at l east f i ve r ef er ences f or wor k of a magni t ude compar abl e t o t hi s cont r act , i ncl udi ng poi nt s of cont act , addr esses and t el ephone number s.

1. 3. 2 Syst em I nst al l er

Cal i br at i on, t est i ng, adj ust ment , and pl aci ng i nt o ser vi ce of t he pr ot ect i ve devi ces shal l be accompl i shed by a manuf act ur er ' s pr oduct f i el d ser vi ce engi neer or i ndependent t est i ng company wi t h a mi ni mum of t wo year s of cur r ent pr oduct exper i ence i n pr ot ect i ve devi ces.

1. 4 DELI VERY, STORAGE, AND HANDLI NG

Devi ces and equi pment shal l be v i sual l y i nspect ed when r ecei ved and pr i or t o accept ance f r om conveyance. Pr ot ect st or ed i t ems f r om t he envi r onment i n accor dance wi t h t he manuf act ur er ' s publ i shed i nst r uct i ons. Damaged i t ems shal l be r epl aced.

PART 2 PRODUCTS

2. 1 STANDARD PRODUCT

Pr ovi de pr ot ect i ve devi ces and equi pment whi ch ar e t he st andar d pr oduct of a manuf act ur er r egul ar l y engaged i n t he manuf act ur e of t he pr oduct and t hat essent i al l y dupl i cat e i t ems t hat have been i n sat i sf act or y ut i l i t y t ype use f or at l east t wo year s pr i or t o bi d openi ng. Submi t dat a consi st i ng of manuf act ur er ' s t i me- cur r ent char act er i st i c cur ves f or i ndi v i dual pr ot ect i ve devi ces, r ecommended set t i ngs of adj ust abl e pr ot ect i ve devi ces, and r ecommended r at i ngs of non- adj ust abl e pr ot ect i ve devices.

2. 2 NAMEPLATES

Pr ovi de namepl at es t o i dent i f y al l pr ot ect i ve devi ces and equi pment .

Namepl at e i nf or mat i on shal l be i n accor dance wi t h UL 489.

2. 3 CORROSI ON PROTECTI ON

Met al l i c mat er i al s shal l be pr ot ect ed agai nst cor r osi on. Fer r ous met al har dwar e shal l be z i nc or chr ome- pl at ed.

2. 4 MOTOR CONTROLS AND MOTOR CONTROL CENTERS

Mot or cont r ol s and mot or cont r ol cent er s shal l be i n accor dance wi t h NEMA I CS 1, NEMA I CS 2, NEMA I CS 3 and NEMA I CS 6, and UL 508and UL 845.

2. 4. 1 Mot or St ar t er s

Pr ovi de combi nat i on st ar t er s wi t h as i ndi cat ed.

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2. 4. 2 Ther mal - Over l oad Pr ot ect i on

Each mot or of 1/ 8 hp or l ar ger shal l be pr ovi ded wi t h t her mal - over l oad pr ot ect i on. Pol yphase mot or s shal l have over l oad pr ot ect i on i n each ungr ounded conduct or . The over l oad- pr ot ect i on devi ce shal l be pr ovi ded ei t her i nt egr al wi t h t he mot or or cont r ol l er , or shal l be mount ed i n a separ at e encl osur e. Unl ess ot her wi se speci f i ed, t he pr ot ect i ve devi ce shal l be of t he manual l y r eset t ype. Si ngl e or doubl e pol e t umbl er swi t ches speci f i cal l y desi gned f or al t er nat i ng- cur r ent oper at i on onl y may be used as manual cont r ol l er s f or s i ngl e- phase mot or s havi ng a cur r ent r at i ng not i n excess of 80 per cent of t he swi t ch r at i ng.

2. 4. 3 Low- Vol t age Mot or Over l oad Rel ays

2. 4. 3. 1 General

Ther mal and magnet i c cur r ent over l oad r el ays shal l conf or m t o NEMA I CS 2 and UL 508. Over l oad pr ot ect i on shal l be pr ovi ded ei t her i nt egr al wi t h t he mot or or cont r ol l er , and shal l be r at ed i n accor dance wi t h t he r equi r ement s of NFPA 70. St andar d uni t s shal l be used f or mot or st ar t i ng t i mes up t o 7 second. Sl ow uni t s shal l be used f or mot or st ar t i ng t i mes f r om 8 t o 12 seconds. Qui ck t r i p uni t s shal l be used on her met i cal l y seal ed, submer si bl e pumps, and si mi l ar mot or s.

2. 4. 3. 2 Construction

Manual r eset t ype t her mal r el ays shal l be mel t i ng al l oy const r uct i on.

Aut omat i c r eset t ype r el ays shal l be bi met al l i c const r uct i on. Magnet i c cur r ent r el ays shal l consi st of a cont act mechani sm and a dash pot mount ed on a common f r ame.

2. 4. 3. 3 Ratings

Vol t age r at i ngs shal l be not l ess t han t he appl i cabl e c i r cui t vol t age.

Tr i p cur r ent r at i ngs shal l be est abl i shed by sel ect i on of t he r epl aceabl e over l oad devi ce and shal l not be adj ust abl e. Wher e t he cont r ol l er i s r emot el y- l ocat ed or di f f i cul t t o r each, an aut omat i c r eset , non- compensat ed over l oad r el ay shal l be pr ovi ded. Manual r eset over l oad r el ays shal l be pr ovi ded ot her wi se, and at al l l ocat i ons wher e aut omat i c st ar t i ng i s pr ovi ded. Wher e t he mot or i s l ocat ed i n a const ant ambi ent t emper at ur e, and t he t her mal devi ce i s l ocat ed i n an ambi ent t emper at ur e t hat r egul ar l y var i es by mor e t han 14 degr ees F, an ambi ent t emper at ur e- compensat ed over l oad r el ay shal l be pr ovi ded.

2. 4. 4 Aut omat i c Cont r ol Devi ces

2. 4. 4. 1 Di r ect Cont r ol

Aut omat i c cont r ol devi ces ( such as t her most at s, f l oat or pr essur e swi t ches) whi ch cont r ol t he st ar t i ng and st oppi ng of mot or s di r ect l y shal l be desi gned f or t hat pur pose and have an adequat e hor sepower r at i ng.

2. 4. 4. 2 Pi l ot - Rel ay Cont r ol

Wher e t he aut omat i c- cont r ol devi ce does not have such a r at i ng, a magnet i c st ar t er shal l be used, wi t h t he aut omat i c- cont r ol devi ce act uat i ng t he pi l ot - cont r ol c i r cui t .

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2. 4. 4. 3 Manual / Aut omat i c Sel ect i on

a. Wher e combi nat i on manual and aut omat i c cont r ol i s speci f i ed and t he aut omat i c- cont r ol devi ce act uat es t he pi l ot cont r ol c i r cui t of a magnet i c st ar t er , t he magnet i c st ar t er shal l be pr ovi ded wi t h a t hr ee- posi t i on sel ect or swi t ch mar ked MANUAL- OFF- AUTOMATI C.

b. Connect i ons t o t he sel ect or swi t ch shal l onl y al l ow t he nor mal aut omat i c r egul at or y cont r ol devi ces t o be bypassed when t he swi t ch i s i n t he Manual posi t i on; al l saf et y cont r ol devi ces, such as l ow- or hi gh- pr essur e cut out s, hi gh- t emper at ur e cut out s, and mot or - over l oad pr ot ect i ve devi ces, shal l be connect ed i n t he mot or - cont r ol c i r cui t i n bot h t he Manual and t he Aut omat i c posi t i ons of t he sel ect or swi t ch.

Cont r ol c i r cui t connect i ons t o any MANUAL- OFF- AUTOMATI C swi t ch or t o mor e t han one aut omat i c r egul at or y cont r ol devi ce shal l be made i n accor dance wi t h wi r i ng di agr am appr oved by t he cont r act i ng Of f i cer unl ess such di agr am i s i ncl uded on t he dr awi ngs. Al l cont r ol s shal l be 120 vol t s or l ess unl ess ot her wi se i ndi cat ed.

2. 4. 5 Mot or Cont r ol Cent er s

Cont r ol cent er s shal l be i ndoor t ype and shal l cont ai n combi nat i on st ar t er s and ot her equi pment as i ndi cat ed. Cont r ol cent er s shal l conf or m t o NEMA I CS 2. Each cont r ol cent er shal l be mount ed on f l oor s i l l s or mount i ng channel s. Each ci r cui t shal l have a sui t abl e met al or l ami nat ed pl ast i c namepl at e wi t h whi t e cut l et t er s. Mot or cont r ol cent er s shal l be pr ovi ded wi t h a f ul l - l engt h gr ound bus bar .

2. 5 LOW- VOLTAGE FUSES

2. 5. 1 General

Low- vol t age f uses shal l conf or m t o NEMA FU 1. Ti me del ay and nont i me del ay opt i ons shal l be as shown. Equi pment pr ovi ded under t hi s cont r act shal l be pr ovi ded wi t h a compl et e set of pr oper l y r at ed f uses when t he equi pment manuf act ur er ut i l i zes f uses i n t he manuf act ur e of t he equi pment , or i f cur r ent - l i mi t i ng f uses ar e r equi r ed t o be i nst al l ed t o l i mi t t he amper e- i nt er r upt i ng capaci t y of c i r cui t br eaker s or equi pment t o l ess t han t he maxi mum avai l abl e f aul t cur r ent at t he l ocat i on of t he equi pment t o be i nst al l ed. Fuses shal l have a vol t age r at i ng of not l ess t han t he phase- t o- phase ci r cui t vol t age, and shal l have t he t i me- cur r ent char act er i st i cs r equi r es f or ef f ect i ve power syst em coor di nat i on.

2. 5. 2 Car t r i dge Fuses; Noncur r ent - Li mi t i ng Type

Car t r i dge f uses of t he noncur r ent - l i mi t i ng t ype shal l be Cl ass H, nonr enewabl e, dual el ement , t i me l ag t ype and shal l have i nt er r upt i ng capaci t y of 10, 000 amper es. Cl ass H Fuses shal l conf or m t o UL 198M. At 500 per cent cur r ent , car t r i dge f uses shal l not bl ow i n l ess t han 10 seconds. Car t r i dge f uses shal l be used f or c i r cui t s r at ed i n excess of 30 amper es, 125 vol t s, except wher e cur r ent - l i mi t i ng f uses ar e i ndi cat ed.

2. 5. 3 Car t r i dge Fuses; Cur r ent - Li mi t i ng Type

Car t r i dge f uses, cur r ent - l i mi t i ng t ype, Cl ass RK1 RK5 shal l have t est ed i nt er r upt i ng capaci t y not l ess t han 100, 000 amper es. Fuse hol der s shal l be t he t ype t hat wi l l r ej ect Cl ass H f uses.

a. Cl ass G, J, L, and CC f uses shal l conf or m t o UL 198M.

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b. Cl ass K f uses shal l conf or m t o UL 198M.

c. Cl ass R f uses shal l conf or m t o UL 198M.

d. Cl ass T f uses shal l conf or m t o UL 198M.

2. 5. 3. 1 Cont i nuous Cur r ent Rat i ngs ( 600 amper es and smal l er )

Ser vi ce ent r ance and f eeder c i r cui t f uses ( 600 amper es and smal l er ) shal l be Cl ass RK1 and RK5, cur r ent - l i mi t i ng, nont i me- del ay wi t h 200, 000 amper es i nt er r upt i ng capaci t y.

2. 5. 3. 2 Cont i nuous Cur r ent Rat i ngs ( gr eat er t han 600 amper es)

Ser vi ce ent r ance and f eeder c i r cui t f uses ( gr eat er t han 600 amper es) shal l be Cl ass L, cur r ent - l i mi t i ng, nont i me- del ay wi t h 200, 000 amper es i nt er r upt i ng capaci t y.

2. 5. 3. 3 Mot or and Tr ansf or mer Ci r cui t Fuses

Mot or , mot or cont r ol l er , t r ansf or mer , and i nduct i ve c i r cui t f uses shal l be Cl ass RK1 or RK5, cur r ent - l i mi t i ng, t i me- del ay wi t h 200, 000 amper es i nt er r upt i ng capaci t y.

2. 6 MOLDED- CASE CI RCUI T BREAKERS

2. 6. 1 General

Mol ded- case ci r cui t br eaker s shal l conf or m t o UL 489 and UL 489. Ci r cui t br eaker s may be i nst al l ed i n panel boar ds, swi t chboar ds, encl osur es, mot or cont r ol cent er s, or combi nat i on mot or cont r ol l er s. Ci r cui t br eaker s and ci r cui t br eaker encl osur es l ocat ed i n hazar dous ( c l assi f i ed) ar eas shal l conf or m t o UL 1203.

2. 6. 2 Construction

Mol ded- case ci r cui t br eaker s shal l be assembl ed as an i nt egr al uni t i n a suppor t i ng and encl osi ng housi ng of gl ass r ei nf or ced i nsul at i ng mat er i al pr ovi di ng hi gh di el ect r i c st r engt h. Ci r cui t br eaker s shal l be sui t abl e f or mount i ng and oper at i ng i n any posi t i on. Lugs shal l be l i s t ed f or copper conduct or s onl y i n accor dance wi t h UL 486E. Si ngl e- pol e c i r cui t br eaker s shal l be f ul l modul e s i ze wi t h not mor e t han one pol e per modul e. Mul t i - pol e c i r cui t br eaker s shal l be of t he common- t r i p t ype havi ng a s i ngl e oper at i ng handl e such t hat an over l oad or shor t c i r cui t on any one pol e wi l l r esul t i n al l pol es openi ng si mul t aneousl y. Si zes of 100 amper es or l ess may consi st of s i ngl e- pol e br eaker s per manent l y f act or y assembl ed i nt o a mul t i - pol e uni t havi ng an i nt er nal , mechani cal , nont amper abl e common- t r i p mechani sm and ext er nal handl e t i es. Al l c i r cui t br eaker s shal l have a qui ck- make, qui ck- br eak over cent er t oggl e- t ype mechani sm, and t he handl e mechani sm shal l be t r i p- f r ee t o pr event hol di ng t he cont act s c l osed agai nst a shor t - c i r cui t or sust ai ned over l oad. Al l c i r cui t br eaker handl es shal l assume a posi t i on bet ween " ON" and " OFF" when t r i pped aut omat i cal l y. Al l r at i ngs shal l be c l ear l y v i s i bl e.

2. 6. 3 Ratings

Vol t age r at i ngs shal l be not l ess t han t he appl i cabl e c i r cui t vol t age.

The i nt er r upt i ng r at i ng of t he c i r cui t br eaker s shal l be at l east equal t o

Apr i l 2019 Page 6 SECTI ON 26 28 01. 00 10 t he avai l abl e shor t - c i r cui t cur r ent at t he l i ne t er mi nal s of t he c i r cui t br eaker and cor r espond t o t he UL l i s t ed i nt egr at ed shor t - c i r cui t cur r ent r at i ng speci f i ed f or t he panel boar ds and swi t chboar ds. Mol ded- case ci r cui t br eaker s shal l have nomi nal vol t age r at i ngs, maxi mum cont i nuous- cur r ent r at i ngs, and maxi mum shor t - c i r cui t i nt er r upt i ng r at i ngs i n accor dance wi t h UL 489. Rat i ngs shal l be coor di nat ed wi t h syst em X/ R ratio.

2. 6. 4 Cascade Syst em Rat i ngs

Ci r cui t br eaker s used i n ser i es combi nat i ons shal l be i n accor dance wi t h UL 489. Equi pment , such as swi t chboar ds and panel boar ds, whi ch house ser i es- connect ed ci r cui t br eaker s shal l be c l ear l y mar ked accor di ngl y.

Ser i es combi nat i ons shal l be l i s t ed i n t he UL Recogni zed Component Di r ect or y under " Ci r cui t Br eaker s- Ser i es Connect ed. "

2. 6. 5 Ther mal - Magnet i c Tr i p El ement s

Ther mal magnet i c c i r cui t br eaker s shal l be pr ovi ded as shown. Aut omat i c oper at i on shal l be obt ai ned by means of t her mal - magnet i c t r i ppi ng devi ces l ocat ed i n each pol e pr ovi di ng i nver se t i me del ay and i nst ant aneous ci r cui t pr ot ect i on. The i nst ant aneous magnet i c t r i p shal l be adj ust abl e and accessi bl e f r om t he f r ont of al l c i r cui t br eaker s on f r ame si zes above 150 amper es.

2. 6. 6 Sol i d- St at e Tr i p El ement s

Sol i d- st at e c i r cui t br eaker s shal l be pr ovi ded as shown. Al l el ect r oni cs shal l be sel f - cont ai ned and r equi r e no ext er nal r el ayi ng, power suppl y, or accessor i es. Pr i nt ed ci r cui t car ds shal l be t r eat ed t o r esi st moi st ur e absor pt i on, f ungus gr owt h, and si gnal l eakage. Al l el ect r oni cs shal l be housed i n an encl osur e whi ch pr ovi des pr ot ect i on agai nst ar cs, magnet i c i nt er f er ence, dust , and ot her cont ami nant s. Sol i d- st at e sensi ng shal l measur e t r ue RMS cur r ent wi t h er r or l ess t han one per cent on syst ems wi t h di st or t i ons t hr ough t he 13t h har moni c. Peak or aver age act uat i ng devi ces ar e not accept abl e. Cur r ent sensor s shal l be t or oi dal const r uct i on, encased i n a pl ast i c housi ng f i l l ed wi t h epoxy t o pr ot ect agai nst damage and moi st ur e and shal l be i nt egr al l y mount ed on t he br eaker . Wher e i ndi cat ed on t he dr awi ngs, c i r cui t br eaker f r ames shal l be r at ed f or 100 per cent cont i nuous dut y. Ci r cui t br eaker s shal l have t r i ppi ng f eat ur es as shown on t he dr awi ngs and as descr i bed bel ow:

a. Long- t i me cur r ent pi ck- up, adj ust abl e f r om 50 per cent t o 100 per cent of cont i nuous cur r ent r at i ng.

b. Adj ust abl e l ong- t i me del ay.

c. Shor t - t i me cur r ent pi ck- up, adj ust abl e f r om 1. 5 t o 9 t i mes l ong- t i me cur r ent set t i ng.

d. Adj ust abl e shor t - t i me del ay.

e. Shor t - t i me I squar e t i mes t swi t ch.

f . I nst ant aneous cur r ent pi ck- up, adj ust abl e f r om 1. 5 t o 9 t i mes l ong- t i me cur r ent set t i ng.

g. Gr ound- f aul t pi ck- up, adj ust abl e f r om 20 per cent t o 60 per cent of sensor r at i ng, but i n no case gr eat er t han 1200 amper es. Sensi ng of

Apr i l 2019 Page 7 SECTI ON 26 28 01. 00 10 gr ound- f aul t cur r ent at t he mai n bondi ng j umper or gr ound st r ap shal l not be per mi t t ed. Zone- sel ect i ve i nt er l ocki ng shal l be pr ovi ded as shown.

h. Adj ust abl e gr ound- f aul t del ay.

i . Gr ound- f aul t I squar e t i mes t swi t ch.

j . Over l oad and Shor t - c i r cui t and Gr ound- f aul t t r i p i ndi cat or s shal l be provided.

2. 6. 7 SWD Ci r cui t Br eaker s

Ci r cui t br eaker s r at ed 15 amper es or 20 amper es and i nt ended t o swi t ch 277 vol t s or l ess f l uor escent l i ght i ng l oads shal l be mar ked " SWD. "

2. 6. 8 HACR Ci r cui t Br eaker s

Ci r cui t br eaker s 60 amper es or bel ow, 240 vol t s, 1- pol e or 2- pol e, i nt ended t o pr ot ect mul t i - mot or and combi nat i on- l oad i nst al l at i ons i nvol ved i n heat i ng, ai r condi t i oni ng, and r ef r i ger at i ng equi pment shal l be mar ked " Li st ed HACR Type. "

2. 6. 9 Mot or Ci r cui t Pr ot ect or s ( MCP)

Mot or c i r cui t pr ot ect or s shal l conf or m t o UL 489 and UL 489 and shal l be pr ovi ded as shown. MCPs shal l consi st of an adj ust abl e i nst ant aneous t r i p c i r cui t br eaker i n conj unct i on wi t h a combi nat i on mot or cont r ol l er whi ch pr ovi des coor di nat ed mot or c i r cui t over l oad and shor t - c i r cui t pr ot ect i on.

Mot or Ci r cui t Pr ot ect or s shal l be r at ed i n accor dance wi t h NFPA 70.

2. 7 LOW- VOLTAGE POWER CI RCUI T BREAKERS

2. 7. 1 Construction

Low- vol t age power c i r cui t br eaker s shal l conf or m t o I EEE C37. 13 and I EEE C37. 16 and shal l be t hr ee- pol e, s i ngl e- t hr ow, st or ed ener gy, el ect r i cal l y oper at ed, wi t h dr awout mount i ng. Sol i d- st at e t r i p el ement s whi ch r equi r e no ext er nal power connect i ons shal l be pr ovi ded. Ci r cui t br eaker s shal l have an open/ cl ose cont act posi t i on i ndi cat or , char ged/ di schar ged st or ed ener gy i ndi cat or , pr i mar y di sconnect devi ces, and a mechani cal i nt er l ock t o pr event maki ng or br eaki ng cont act of t he pr i mar y di sconnect s when t he ci r cui t br eaker i s c l osed. Cont r ol vol t age shal l be as i ndi cat ed. The ci r cui t br eaker encl osur e shal l be sui t abl e f or i t s i nt ended l ocat i on.

2. 7. 2 Ratings

Vol t age r at i ngs shal l be not l ess t han t he appl i cabl e c i r cui t vol t age.

Ci r cui t br eaker s shal l be r at ed f or 100 per cent cont i nuous dut y and shal l have t r i p cur r ent r at i ngs and f r ame si zes as shown. Nomi nal vol t age r at i ngs, maxi mum cont i nuous- cur r ent r at i ngs, and maxi mum shor t - c i r cui t i nt er r upt i ng r at i ngs shal l be i n accor dance wi t h I EEE C37. 16. Tr i ppi ng f eat ur es shal l be as f ol l ows:

a. Long- t i me cur r ent pi ck- up, adj ust abl e f r om 50 per cent t o 100 per cent of sensor cur r ent r at i ng.

b. Adj ust abl e l ong- t i me del ay.

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c. Shor t - t i me cur r ent pi ck- up, adj ust abl e f r om 1. 5 t o 9 t i mes l ong- t i me cur r ent set t i ng.

d. Adj ust abl e shor t - t i me del ay.

e. Shor t - t i me I squar e t i mes t swi t ch.

f . I nst ant aneous cur r ent pi ck- up, adj ust abl e f r om 1. 5 t o 9 t i mes l ong- t i me cur r ent set t i ng.

g. Gr ound- f aul t pi ck- up, adj ust abl e f r om 20 per cent t o 60 per cent of sensor r at i ng, but i n no case gr eat er t han 1200 amper es. Sensi ng of gr ound- f aul t cur r ent at t he mai n bondi ng j umper or gr ound st r ap shal l not be per mi t t ed. Zone- sel ect i ve i nt er l ocki ng shal l be pr ovi ded as shown.

h. Adj ust abl e gr ound- f aul t del ay.

i . Gr ound- f aul t I squar e t i mes t swi t ch.

j . Over l oad and Shor t - c i r cui t and Gr ound- f aul t t r i p i ndi cat or s shal l be provided.

2. 8 I NSTRUMENT TRANSFORMERS

2. 8. 1 General

I nst r ument t r ansf or mer s shal l compl y wi t h NEMA/ ANSI C12. 11 and I EEE C57. 13.

I nst r ument t r ansf or mer s shal l be conf i gur ed f or mount i ng i n/ on t he devi ce t o whi ch t hey ar e appl i ed. Pol ar i t y mar ks on i nst r ument t r ansf or mer s shal l be v i sual l y evi dent and shown on t he dr awi ngs.

2. 8. 2 Cur r ent Tr ansf or mer s

Unl ess ot her wi se i ndi cat ed, bar , wound, or wi ndow- t ype t r ansf or mer s ar e accept abl e; and except f or wi ndow- t ype uni t s i nst al l ed over i nsul at ed buses, t r ansf or mer s shal l have a BI L r at i ng consi st ent wi t h t he r at ed BI L of t he associ at ed swi t chgear or el ect r i c power appar at us bushi ngs, buses or conduct or s. Cur r ent t r ansf or mer s shal l have t he i ndi cat ed r at i os. The cont i nuous t her mal - cur r ent r at i ng f act or shal l be not l ess t han 1. 0.

Ot her t her mal and mechani cal r at i ngs of cur r ent t r ansf or mer s and t hei r pr i mar y l eads shal l be coor di nat ed wi t h t he desi gn of t he c i r cui t br eaker and shal l be not l ess t han t he moment ar y r at i ng of t he associ at ed ci r cui t br eaker . Ci r cui t pr ot ect or s shal l be pr ovi ded acr oss secondar y l eads of t he cur r ent t r ansf or mer s t o pr event t he acci dent al open- ci r cui t i ng of t he t r ansf or mer s whi l e ener gi zed. Each t er mi nal of each cur r ent t r ansf or mer shal l be connect ed t o a shor t - c i r cui t i ng t er mi nal bl ock i n t he c i r cui t i nt er r upt i ng mechani sm cabi net , power t r ansf or mer t er mi nal cabi net , and i n t he associ at ed i nst r ument and r el ay cabi net s.

2. 9 COORDI NATED POWER SYSTEM PROTECTI ON

Anal yses shal l be pr epar ed t o demonst r at e t hat t he equi pment sel ect ed and syst em const r uct ed meet t he cont r act r equi r ement s f or r at i ngs, coor di nat i on, and pr ot ect i on. They shal l i ncl ude a l oad f l ow anal ysi s, a f aul t cur r ent anal ysi s, and a pr ot ect i ve devi ce coor di nat i on st udy.

Submi t t he st udy al ong wi t h pr ot ect i ve devi ce equi pment submi t t al s. No t i me ext ensi ons or s i mi l ar cont act modi f i cat i ons wi l l be gr ant ed f or wor k

Apr i l 2019 Page 9 SECTI ON 26 28 01. 00 10 ar i s i ng out of t he r equi r ement s f or t hi s st udy. Appr oval of pr ot ect i ve devi ces pr oposed wi l l be based on r ecommendat i ons of t hi s st udy. The Gover nment shal l not be hel d r esponsi bl e f or any changes t o equi pment , devi ce r at i ngs, set t i ngs, or addi t i onal l abor f or i nst al l at i on of equi pment or devi ces or der ed and/ or pr ocur ed pr i or t o appr oval of t he st udy. The st udi es shal l be per f or med by a r egi st er ed pr of essi onal engi neer wi t h demonst r at ed exper i ence i n power syst em coor di nat i on i n t he l ast 3 year s. Pr ovi de a l i s t of r ef er ences compl et e wi t h poi nt s of cont act , addr esses and t el ephone number s. The sel ect i on of t he engi neer i s subj ect t o t he appr oval of t he Cont r act i ng Of f i cer .

2. 9. 1 Scope of Anal yses

The f aul t cur r ent anal ysi s, and pr ot ect i ve devi ce coor di nat i on st udy shal l begi n at : t he sour ce bus and ext end down t o syst em buses wher e f aul t avai l abi l i t y i s 10, 000 amper es ( symmet r i cal ) f or bui l di ng/ f aci l i t y 600 vol t l evel di st r i but i on buses.

2. 9. 2 Det er mi nat i on of Fact s

The t i me- cur r ent char act er i st i cs, f eat ur es, and namepl at e dat a f or each exi st i ng pr ot ect i ve devi ce shal l be det er mi ned and document ed. Coor di nat e wi t h t he commer ci al power company f or f aul t cur r ent avai l abi l i t y at t he s i t e.

2. 9. 3 Si ngl e Li ne Di agr am

A si ngl e l i ne di agr am shal l be pr epar ed t o show t he el ect r i cal syst em buses, devi ces, t r ansf or mat i on poi nt s, and al l sour ces of f aul t cur r ent ( i ncl udi ng gener at or and mot or cont r i but i ons) . A f aul t - i mpedance di agr am or a comput er anal ysi s di agr am may be pr ovi ded. Each bus, devi ce or t r ansf or mat i on poi nt shal l have a uni que i dent i f i er . I f a f aul t - i mpedance di agr am i s pr ovi ded, i mpedance dat a shal l be shown. Locat i on of swi t ches, br eaker s, and ci r cui t i nt er r upt i ng devi ces shal l be shown on t he di agr am t oget her wi t h avai l abl e f aul t dat a, and t he devi ce i nt er r upt i ng r at i ng.

2. 9. 4 Faul t Cur r ent Anal ysi s

2. 9. 4. 1 Method

The f aul t cur r ent anal ysi s shal l be per f or med i n accor dance wi t h met hods descr i bed i n I EEE 242, and I EEE 399.

2. 9. 4. 2 Data

Act ual dat a shal l be ut i l i zed i n f aul t cal cul at i ons. Bus char act er i st i cs and t r ansf or mer i mpedance shal l be t hose pr oposed. Dat a shal l be document ed i n t he r epor t .

2. 9. 4. 3 Faul t Cur r ent Avai l abi l i t y

Bal anced t hr ee- phase f aul t , bol t ed l i ne- t o- l i ne f aul t , and l i ne- t o- gr ound f aul t cur r ent val ues shal l be pr ovi ded at each vol t age t r ansf or mat i on poi nt and at each power di st r i but i on bus. The maxi mum and mi ni mum val ues of f aul t avai l abl e at each l ocat i on shal l be shown i n t abul ar f or m on t he di agr am or i n t he r epor t .

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2. 9. 5 Coor di nat i on St udy

The st udy shal l demonst r at e t hat t he maxi mum possi bl e degr ee of sel ect i v i t y has been obt ai ned bet ween devi ces speci f i ed, consi st ent wi t h pr ot ect i on of equi pment and conduct or s f r om damage f r om over l oads and f aul t condi t i ons. The st udy shal l i ncl ude a descr i pt i on of t he coor di nat i on of t he pr ot ect i ve devi ces i n t hi s pr oj ect . A wr i t t en nar r at i ve shal l be pr ovi ded descr i bi ng: whi ch devi ces may oper at e i n t he event of a f aul t at each bus; t he l ogi c used t o ar r i ve at devi ce r at i ngs and set t i ngs; s i t uat i ons wher e syst em coor di nat i on i s not achi evabl e due t o devi ce l i mi t at i ons ( an anal ysi s of any devi ce cur ves whi ch over l ap) ;

coor di nat i on bet ween upst r eam and downst r eam devi ces; and r el ay set t i ngs.

Recommendat i ons t o i mpr ove or enhance syst em r el i abi l i t y , and det ai l wher e such changes woul d i nvol ve addi t i ons or modi f i cat i ons t o t he cont r act and cost damages ( addi t i on or r educt i on) shal l be pr ovi ded. Composi t e coor di nat i on pl ot s shal l be pr ovi ded on l og- l og gr aph paper .

2. 9. 6 St udy r epor t

a. The r epor t shal l i ncl ude a nar r at i ve descr i bi ng: t he anal yses per f or med; t he bases and met hods used; and t he desi r ed met hod of coor di nat ed pr ot ect i on of t he power syst em.

b. The st udy shal l i ncl ude descr i pt i ve and t echni cal dat a f or exi st i ng devi ces and new pr ot ect i ve devi ces pr oposed. The dat a shal l i ncl ude manuf act ur er s publ i shed dat a, namepl at e dat a, and def i ni t i on of t he f i xed or adj ust abl e f eat ur es of t he exi st i ng or new pr ot ect i ve devi ces.

c. The r epor t shal l document ut i l i t y company dat a i ncl udi ng syst em vol t ages, f aul t MVA, syst em X/ R r at i o, t i me- cur r ent char act er i st i c cur ves, cur r ent t r ansf or mer r at i os, and r el ay devi ce number s and set t i ngs; and exi st i ng power syst em dat a i ncl udi ng t i me- cur r ent char act er i st i c cur ves and pr ot ect i ve devi ce r at i ngs and set t i ngs.

d. The r epor t shal l cont ai n f ul l y coor di nat ed composi t e t i me- cur r ent char act er i st i cs cur ves f or each bus i n t he syst em, as r equi r ed t o ensur e coor di nat ed power syst em pr ot ect i on bet ween pr ot ect i ve devi ces or equi pment . The r epor t shal l i ncl ude r ecommended r at i ngs and set t i ngs of al l pr ot ect i ve devi ces i n t abul at ed f or m.

e. The r epor t shal l pr ovi de t he cal cul at i on per f or med f or t he anal yses, i ncl udi ng comput er anal ysi s pr ogr ams ut i l i zed. The name of t he sof t war e package, devel oper , and ver si on number shal l be pr ovi ded.

PART 3 EXECUTI ON

3. 1 EXAMINATION

Af t er becomi ng f ami l i ar wi t h det ai l s of t he wor k, ver i f y di mensi ons i n t he f i el d, and advi se t he Cont r act i ng Of f i cer of any di scr epancy bef or e per f or mi ng any wor k.

3. 2 INSTALLATION

Submi t pr ocedur es i ncl udi ng di agr ams, i nst r uct i ons, and pr ecaut i ons r equi r ed t o pr oper l y i nst al l , adj ust , cal i br at e, and t est t he devi ces and equi pment . I nst al l pr ot ect i ve devi ces i n accor dance wi t h t he manuf act ur er ' s publ i shed i nst r uct i ons and i n accor dance wi t h t he r equi r ement s of NFPA 70 and I EEE C2.

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3. 3 FI ELD TESTI NG

Pr i or t o f i el d t est s, submi t t he pr oposed t est pl an consi st i ng of compl et e f i el d t est pr ocedur e, t est s t o be per f or med, t est equi pment r equi r ed, and t ol er ance l i mi t s, and compl et e t est i ng and ver i f i cat i on of t he gr ound f aul t pr ot ect i on equi pment , wher e used. Submi t per f or mance t est r epor t s i n bookl et f or m showi ng al l f i el d t est s per f or med t o adj ust each component and al l f i el d t est s per f or med t o pr ove compl i ance wi t h t he speci f i ed per f or mance cr i t er i a, upon compl et i on and t est i ng of t he i nst al l ed syst em. Each t est r epor t shal l i ndi cat e t he f i nal posi t i on of cont r ol s.

3. 3. 1 General

Per f or m f i el d t est i ng i n t he pr esence of t he Cont r act i ng Of f i cer . Not i f y t he Cont r act i ng Of f i cer 10 days pr i or t o conduct i ng t est s. Fur ni sh al l mat er i al s, l abor , and equi pment necessar y t o conduct f i el d t est s. Per f or m al l t est s and i nspect i ons r ecommended by t he manuf act ur er unl ess speci f i cal l y wai ved by t he Cont r act i ng Of f i cer . Mai nt ai n a wr i t t en r ecor d of al l t est s whi ch i ncl udes dat e, t est per f or med, per sonnel i nvol ved, devi ces t est ed, ser i al number and name of t est equi pment , and t est r esul t s.

3. 3. 2 Safety

Pr ovi de and use saf et y devi ces such as r ubber gl oves, pr ot ect i ve bar r i er s, and danger s i gns t o pr ot ect and war n per sonnel i n t he t est v i c i ni t y.

Repl ace any devi ces or equi pment whi ch ar e damaged due t o i mpr oper t est pr ocedur es or handl i ng.

3. 3. 3 Mol ded- Case Ci r cui t Br eaker s

Ci r cui t br eaker s shal l be v i sual l y i nspect ed, oper at ed manual l y, and connect i ons checked f or t i ght ness. Cur r ent r at i ngs shal l be ver i f i ed and adj ust abl e set t i ngs i ncor por at ed i n accor dance wi t h t he coor di nat i on st udy.

3. 3. 4 Power Ci r cui t Br eaker s

3. 3. 4. 1 General

Vi sual l y i nspect t he c i r cui t br eaker and oper at e t he c i r cui t br eaker manual l y; adj ust and cl ean pr i mar y cont act s i n accor dance wi t h manuf act ur er ' s publ i shed i nst r uct i ons; check t ol er ances and cl ear ances;

check f or pr oper l ubr i cat i on; and ensur e t hat al l connect i ons ar e t i ght .

For el ect r i cal l y oper at ed ci r cui t br eaker s, ver i f y oper at i ng vol t ages on cl osi ng and t r i ppi ng coi l s. Ver i f y f use r at i ngs i n cont r ol c i r cui t s;

el ect r i cal l y oper at e t he br eaker , wher e appl i cabl e; and i mpl ement set t i ngs i n accor dance wi t h t he coor di nat i on st udy.

3. 3. 4. 2 Power Ci r cui t Br eaker Test s

Power c i r cui t br eaker s shal l be t est ed i n accor dance wi t h NEMA C37. 50.

3. 3. 5 Pr ot ect i ve Rel ays

Pr ot ect i ve r el ays shal l be v i sual l y and mechani cal l y i nspect ed, adj ust ed, t est ed, and cal i br at ed i n accor dance wi t h t he manuf act ur er ' s publ i shed i nst r uct i ons. Submi t dat a i ncl udi ng cal i br at i on and t est i ng pr ocedur es and i nst r uct i ons per t ai ni ng t o t he f r equency of cal i br at i on, i nspect i on, Apr i l 2019 Page 12 SECTI ON 26 28 01. 00 10 adj ust ment , c l eani ng, and l ubr i cat i on. Test s shal l i ncl ude pi ck- up, t i mi ng, cont act act i on, r est r ai nt , and ot her aspect s necessar y t o ensur e pr oper cal i br at i on and oper at i on. Rel ay set t i ngs shal l be i mpl ement ed i n accor dance wi t h t he coor di nat i on st udy. Rel ay cont act s shal l be manual l y or el ect r i cal l y oper at ed t o ver i f y t hat t he pr oper br eaker s and al ar ms i ni t i at e.

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