Spec_26_35_43_converters.pdf

ACA Al er t Ai r cr af t Shel t er s WYTD079031 Tol edo Expr ess Ai r por t , OH

SECTI ON 26 35 43

400- HERTZ ( HZ) SOLI D STATE FREQUENCY CONVERTER

05/11

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 1159 ( 2009) Recommended Pr act i ce on Moni t or i ng El ect r i c Power Qual i t y

I EEE 519 ( 2014) Recommended Pr act i ces and Requi r ement s f or Har moni c Cont r ol i n El ect r i cal Power Syst ems

I EEE C2 ( 2017; Er r at a 1- 2 2017; I NT 1 2017) Nat i onal El ect r i cal Saf et y Code

I EEE C62. 41. 1 ( 2002; R 2008) Gui de on t he Sur ges Envi r onment i n Low- Vol t age ( 1000 V and Less) AC Power Ci r cui t s

I EEE C62. 41. 2 ( 2002) Recommended Pr act i ce on Char act er i zat i on of Sur ges i n Low- Vol t age ( 1000 V and Less) AC Power Ci r cui t s

NATI ONAL ELECTRI CAL MANUFACTURERS ASSOCI ATI ON ( NEMA)

NEMA 250 ( 2014) Encl osur es f or El ect r i cal Equi pment ( 1000 Vol t s Maxi mum)

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

NFPA 70 ( 2017; ERTA 1- 2 2017; TI A 17- 1; TI A 17- 2;

TI A 17- 3; TI A 17- 4; TI A 17- 5; TI A 17- 6;

TI A 17- 7; TI A 17- 8; TI A 17- 9; TI A 17- 10;

TI A 17- 11; TI A 17- 12; TI A 17- 13; TI A

17- 14) Nat i onal El ect r i cal Code

SOCI ETY OF AUTOMOTI VE ENGI NEERS I NTERNATI ONAL ( SAE)

SAE AS5756/ 6 ( 2013; Rev A; St abi l i zed ( S) 2013) Cabl e, 3- Phase Power , El ect r i c Por t abl e, Mul t i conduct or , 90 Degr ee C, 600V, Ozone Resi st ant , Spl i t Phase

U. S. DEPARTMENT OF DEFENSE ( DOD)

MIL-PRF-24021 ( 1998; Rev K; Not i ce 1 2014) El ect r i c Power Moni t or s, Ext er nal Ai r cr af t

SECTI ON 26 35 43 Page 1 Amendment 0001

MIL-STD-704 ( 2004; Rev F; Not i ce 1 2008; Not i ce 2 2013) Ai r cr af t El ect r i c Power Characteristics

UNDERWRI TERS LABORATORI ES ( UL)

UL 1012 ( 2010; Repr i nt Apr 2016) UL St andar d f or Saf et y Power Uni t s Ot her t han Cl ass 2

UL 1449 ( 2014; Repr i nt Mar 2016) UL St andar d f or Saf et y Sur ge Pr ot ect i ve Devi ces

UL 489 ( 2016) UL St andar d f or Saf et y 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

1. 2 GENERAL REQUI REMENTS

Sect i on 26 00 00. 00 20 BASI C ELECTRI CAL MATERI ALS AND METHODS, appl i es t o t hi s Sect i on wi t h addi t i on and modi f i cat i ons speci f i ed her ei n.

1. 3 SUBMITTALS

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 SUBMI TTAL PROCEDURES:

SD- 02 Shop Dr awi ngs

Fr equency Conver t er Dr awi ngs; G

SD- 03 Pr oduct Dat a

Fr equency Conver t er ; G

Ai r cr af t Power Cabl e Assembl y; G

Remot e Moni t or i ng and Cont r ol Panel ; G

SD- 06 Test Repor t s

Wor k Pl an; G

Per f or mance Test Pl an; G

Test Schedul e; G

Rout i ne Fact or y Test s; G

Speci al Fact or y Test s; G

SD- 07 Cer t i f i cat es

Qual i f i cat i ons of Manuf act ur er ; G

UL Li st i ng; G

SECTI ON 26 35 43 Page 2

SD- 09 Manuf act ur er ' s Fi el d Repor t s

I ni t i al I nspect i on and Test s; G

Per f or mance Test s; G

Tr ai ni ng Syl l abus; G

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

Fr equency Conver t er , Dat a Package 5; G

Pr el i mi nar y Oper at i on and Mai nt enance Manual s, Dat a Package 5; G

Remot e Moni t or i ng and Cont r ol Panel , Dat a Package 5; G

1. 4 QUALI TY ASSURANCE

1. 4. 1 Fr equency Conver t er Dr awi ngs

Fur ni sh scal ed dr awi ngs of encl osur e out l i ne i ncl udi ng f r ont , t op, s i de v i ews, and over al l di mensi ons. Pr ovi de ext er nal power and cont r ol wi r i ng and cabl e connect i ons. Pr ovi de s i ngl e l i ne, schemat i c, and wi r i ng di agr ams. Dr awi ngs shal l i ncl ude det ai l s of i nput and out put c i r cui t br eaker s, cont act or s, r ect i f i er s, sur ge pr ot ect or s, and cont r ol devi ces.

Dr awi ngs shal l i ncl ude condui t ent r y and exi t l ocat i ons. I f par al l el oper at i on i s i nc l uded, pr ovi de an i nt er connect i on di agr am.

1. 4. 2 Qual i f i cat i ons of Manuf act ur er

Submi t a cer t i f i cat i on t hat t he manuf act ur er has a mi ni mum of f i ve ( 5) year s ' exper i ence i n t he desi gn, manuf act ur i ng, and t est i ng of 400 Hz sol i d st at e f r equency conver t er s at t he same or equi val ent kVA and vol t age r at i ngs f or di r ect connect i on t o ai r cr af t el ect r i cal l oads. When Speci f i cat i ons r equi r e mul t i pl e conver t er s oper at i ng i n par al l el , t he manuf act ur er shal l pr ovi de speci f i c exper i ence wi t h equal or gr eat er kVA r at ed conver t er s.

The cer t i f i cat i on shal l s t at e t hat t he manuf act ur er i s exper i enced i n manuf act ur i ng and t est i ng sol i d st at e conver t er s of an equi val ent or gr eat er kVA r at i ng. Exper i ence i n manuf act ur i ng mot or gener at or set s does not qual i f y as equi val ent . Exper i ence i n manuf act ur i ng por t abl e engi ne- dr i ven 400- her t z power uni t s does not qual i f y as equi val ent . The manuf act ur er shal l be exper i enced i n pr oduci ng uni t s f or i nst al l at i on i n per manent bui l di ngs i n envi r onment al l y c l osed spaces or i n weat her pr oof encl osur es as appl i cabl e. The manuf act ur er shal l al so document t hat conver t er s ar e desi gned f or connect i on t o non- l i near l oads t ypi cal l y encount er ed i n t he ai r cr af t and shi pbui l di ng i ndust r i es. The manuf act ur er shal l f ur ni sh document ed exper i ence wi t h conver t er s i n var i ous envi r onment al condi t i ons i ncl udi ng ext er i or f l i ght l i ne, hangar , and envi r onment al l y encl osed spaces wi t hi n bui l di ngs.

1. 4. 3 Wor k Pl an

Submi t a wr i t t en schedul e of dat es of r out i ne and speci al f act or y t est s, i nst al l at i on, f i el d t est s, and oper at or t r ai ni ng f or t he conver t er syst em.

Fur ni sh a l i s t of i nst r ument at i on equi pment f or f act or y and f i el d t est reports.

SECTI ON 26 35 43 Page 3

1. 4. 4 Rout i ne Fact or y Test Pl an

Submi t 7 copi es of t est pl ans and pr ocedur es at l east 21 cal endar days pr i or t o t he t est s bei ng conduct ed. Pr ovi de det ai l ed descr i pt i on of t est pr ocedur es, i ncl udi ng t est equi pment and set ups, t o be used t o ensur e t he conver t er meet s t he per f or mance speci f i cat i on and expl ai n t he t est met hods t o be used. As a mi ni mum, t he t est pr ocedur es shal l i ncl ude t he t est s r equi r ed under t he Par agr aph ent i t l ed " Rout i ne Fact or y Test s. "

1. 4. 5 Speci al Fact or y Test Pl an

Submi t 7 copi es of t est pl ans and pr ocedur es wi t h t he Rout i ne Fact or y Test Pl an. Pr ovi de det ai l ed descr i pt i on of t est pr ocedur es, i ncl udi ng t est equi pment and set ups, used t o ensur e t he conver t er meet s t he per f or mance speci f i cat i on and expl ai n t he t est met hods used. As a mi ni mum, t he t est pr ocedur es shal l i ncl ude t he t est s r equi r ed under t he Par agr aph ent i t l ed " Speci al Fact or y Test s. "

1. 4. 6 Per f or mance Test Pl an

Submi t 7 copi es of t est pl ans and pr ocedur es at l east 15 cal endar days pr i or t o t he st ar t of f i el d t est s. Pr ovi de det ai l ed descr i pt i on and dat es and t i mes schedul ed f or per f or mance of t est s, and det ai l ed descr i pt i on of t est pr ocedur es, i ncl udi ng t est equi pment ( l i s t make and model and pr ovi de f unct i onal descr i pt i on of t he t est i nst r ument s and accessor i es) and set ups of t he t est s t o be conduct ed t o ensur e t he conver t er meet s t he per f or mance speci f i cat i on. Expl ai n t he t est met hods t o be used. As a mi ni mum, t he t est pr ocedur es shal l i ncl ude t he t est s r equi r ed under t he Par agr aph ent i t l ed " Fi el d Qual i t y Cont r ol . " Test r epor t s shal l i ncl ude power qual i t y measur ement dat a col l ect ed i n accor dance wi t h I EEE 1159.

1. 4. 7 UL Li st i ng

Submi t wi t h t he i ni t i al submi t t al t o ver i f y qual i f i cat i on of manuf act ur er .

Fr equency conver t er shal l be i dent i f i ed wi t h a UL or nat i onal l y r ecogni zed t est i ng l abor at or y ( NRTL) l abel pr i or t o shi ppi ng.

1. 4. 7. 1 Cur r ent l y Li st ed Pr oduct s

Submi t UL or NRTL cer t i f i cat i on or UL f i l e number f or t he act ual f r equency conver t er t o be shi pped.

1. 4. 7. 2 Pr oposed Li st ed Pr oduct s

Submi t UL or NRTL cer t i f i cat i on or UL f i l e number f or same or s i mi l ar r at i ng or pr oduct s i ze r ange of l i ke desi gn uni t .

1. 4. 8 Rout i ne Fact or y Test s Repor t

Submi t wi t hi n 45 cal endar days af t er compl et i on of t est s. Recei ve appr oval of t est pr i or t o shi ppi ng uni t . Cer t i f y t est s wer e conduct ed on each conver t er i n accor dance wi t h t he r equi r ement s set f or t h i n Par agr aph ent i t l ed " Rout i ne Fact or y Test s" and cer t i f y conver t er sat i sf act or i l y oper at ed wi t hi n speci f i ed l i mi t s. Repor t shal l i ncl ude copi es of t he t est pr ocedur es, t est dat a, and r esul t s.

1. 4. 9 Speci al Fact or y Test s Repor t

Cer t i f y t est s wer e conduct ed on a conver t er of t he same desi gn, SECTI ON 26 35 43 Page 4 const r uct i on and kVA and vol t age r at i ng t o be pr ovi ded and i n accor dance wi t h t he r equi r ement s set f or t h i n Par agr aph ent i t l ed " Speci al Fact or y Test " and cer t i f y conver t er oper at ed wi t hout mal f unct i oni ng wi t hi n speci f i ed l i mi t s. Repor t shal l i ncl ude copi es of t he t est pr ocedur es, t est dat a, and r esul t s.

1. 4. 10 Per f or mance Test s Repor t

Submi t r epor t of t est r esul t s as speci f i ed by Par agr aph ent i t l ed " Fi el d Qual i t y Cont r ol " wi t hi n 15 cal endar days af t er compl et i on of t est s.

Cer t i f y t est s wer e conduct ed on each conver t er i n accor dance wi t h t he Par agr aph ent i t l ed " Fi el d Qual i t y Cont r ol " and cer t i f y conver t er sat i sf act or i l y oper at ed wi t hi n speci f i ed l i mi t s. Repor t shal l i ncl ude copi es of t he t est pr ocedur es, t est dat a, and r esul t s.

1. 5 MAINTENANCE

1. 5. 1 Oper at i on and Mai nt enance Manual s

Submi t f r equency conver t er oper at i on and mai nt enance manual s i n accor dance wi t h Sect i on 01 78 23 OPERATI ON AND MAI NTENANCE DATA.

1. 5. 1. 1 Addi t i ons t o Oper at i on and Mai nt enance Manual s

I n addi t i on t o r equi r ement s of Dat a Package 5, i nc l ude t he f ol l owi ng on t he act ual f r equency conver t er pr ovi ded:

a. A " one- l i ne di agr am" f r om ser vi ce ent r ance t o 400 Hz ut i l i zat i on panel or poi nt .

b. A weat her pr oof , t ear - r esi st ant pl ast i c dat a sheet wi t h oper at i ng i nst r uct i ons f or each uni t i ncl udi ng st ar t up and shut down pr ocedur es.

c. Rout i ne and f i el d accept ance t est r epor t s.

d. UL or NRTL cer t i f i cat i on or UL f i l e number .

1. 5. 1. 2 Pr el i mi nar y Oper at i on and Mai nt enance Manual s

Pr i or t o schedul i ng Fi el d Per f or mance Test s, 2 copi es of a Pr el i mi nar y Oper at i on and Mai nt enance Manual must be submi t t ed t o and appr oved by t he Cont r act i ng Of f i cer .

1. 5. 1. 3 Ext r a Mat er i al

Fur ni sh r ecommended manuf act ur er ' s spar e par t s l i s t and schedul e of pr i ces f or each t ype of conver t er and ot her equi pment speci f i ed i n t hi s Sect i on.

Thi s l i s t shal l i ncl ude t he f ol l owi ng:

a. Power semi - conduct or s;

b. Power f i l t er capaci t or s;

c. Pl ug- i n l ogi c car ds;

d. Out put swi t chi ng modul es;

e. Fuses;

SECTI ON 26 35 43 Page 5 f . I ndi cat or l amp/ LED;

g. Vent i l at i on syst em f i l t er s.

PART 2 PRODUCTS

2. 1 FREQUENCY CONVERTER

Pr ovi de f r equency conver t er consi st i ng of modul ar const r uct i on sol i d- st at e component s f or 60 t o 400 Hz conver si on, i nput / out put devi ces, and anci l l ar y cont r ol devi ces. Fr equency conver t er shal l be a st andar d pr oduct of t he manuf act ur er and shal l be t he manuf act ur er ' s l at est desi gn t hat compl i es wi t h t he Speci f i cat i on Requi r ement s. The 400 Hz f r equency conver t er s pr ovi ded under t hi s Cont r act shal l be pr oduct s of t he same manuf act ur er .

The uni t shal l have a cal cul at ed MTBF exceedi ng 24, 000 hour s as cal cul at ed when t he conver t er i s pr ovi ded wi t h year l y ser vi c i ng and mai nt enance. The conver t er shal l be UL or t hi r d par t y l i s t ed t o compl y wi t h UL 1012.

Ci r cui t br eaker s oper at i ng at 400 Hz shal l be desi gned and UL t est ed f or 60 Hz oper at i on and der at ed f or 400 Hz oper at i on. The conver t er shal l use a mi ni mum 12 pul se or act i ve i nput r ect i f i cat i on c i r cui t . Pr ovi de st ar t up and shut down i nst r uct i ons post ed on t he f r ont of t he uni t usi ng engr aved pl ast i c pl at e. Pr ovi de a pl ast i c encapsul at ed schemat i c di agr am at t ached t o t he i nsi de of t he uni t i n c l ear v i ew of mai nt enance per sonnel .

2. 1. 1 El ect r i cal Char act er i st i cs

2. 1. 1. 1 I nput Vol t age

480Y/ 277 V, t hr ee phase, f our wi r e, gr ounded, 60 Hz. Conver t er shal l pr ovi de r at ed out put vol t age when i nput vol t age i s var i ed pl us or mi nus 10 per cent . I nput neut r al cur r ent s shal l not exceed 21 per cent of any i ndi v i dual phase cur r ent at no l oad and at f ul l l oad.

2. 1. 1. 2 I nput Power Fact or

Bet ween 0. 8 l aggi ng and uni t y, under al l condi t i ons of st eady st at e l i ne and l oad var i at i ons speci f i ed her ei n.

2. 1. 1. 3 Sur ge Pr ot ect i on

The conver t er shal l be capabl e of sust ai ni ng an i nput sur ge descr i bed i n and t est ed i n accor dance wi t h UL 1449, and I EEE C62. 41. 1 and I EEE C62. 41. 2, Locat i on Cat egor y B, and cont i nue t o oper at e wi t h no al ar ms wi t hi n t he speci f i ed t ol er ance.

2. 1. 1. 4 I nr ush Cur r ent

The i nr ush cur r ent shal l not exceed 100 per cent of t he r at ed f ul l l oad i nput cur r ent . I nr ush cur r ent l i mi t at i on i s based on a f r equency conver t er t hat does not r equi r e a t r ansf or mer at t he i nput t o t he uni t . Shoul d t he cont r act or choose t o pr ovi de a f r equency conver t er wi t h a t r ansf or mer at t he i nput t o t he uni t , t he cont r act or shal l be r esponsi bl e f or i ncr easi ng t he s i ze of t he upst r eam f eeder br eaker ( s) and i ncr easi ng t he s i ze of conduct or s and r aceways i n accor dance wi t h NFPA 70.

2. 1. 1. 5 I nput Cur r ent Di st or t i on

I nput cur r ent THD shal l not exceed 12- per cent of t he f undament al wi t h nomi nal i nput vol t age at f ul l l oad. I ndi v i dual har moni c cont ent shal l not

SECTI ON 26 35 43 Page 6 exceed 8- per cent of t he f undament al .

2. 1. 1. 6 Out put Vol t age

200Y/ 115 V, t hr ee phase, 400 Hz, gr ounded syst em. Adj ust abl e t o pl us or mi nus 10 per cent of t he r at ed vol t age. The l i mi t s over vol t age and under vol t age shal l be as def i ned i n MIL-STD-704 pl us or mi nus 2 per cent .

The phase r ot at i on of t he out put vol t age shal l be c l ockwi se sequence of A- B- C. Conver t er s shal l be desi gned f or compat i bi l i t y wi t h shi p and ai r cr af t power moni t or s compl yi ng wi t h MIL-PRF-24021 .

**AM0001** 2. 1. 1. 7 Power Out put

250 kVA50 kW at 0. 8 power f act or l aggi ng. **AM0001**

2. 1. 1. 8 Load Range

Oper at e i nt o a l i near l oad wi t h a power f act or bet ween 0. 5 l aggi ng and 0. 8 l eadi ng and i nt o a non- l i near l oad wi t h not l ess t han 15 per cent cur r ent THD, composed of not l ess t han 6 per cent of t he 3r d har moni c and not l ess t han 7 per cent of t he 5t h har moni c.

**AM0001** 2. 1. 1. 9 Efficiency

The 250 kVA50 kW uni t s shal l have a mi ni mum ef f i c i ency of 89 at 50 per cent l oad and 92 at 100 per cent l oad. For a f r equency conver t er t hat r equi r es a t r ansf or mer at t he i nput t o t he uni t , r educe t he speci f i ed ef f i c i enci es by 2 per cent . **AM0001**

2. 1. 1. 10 No Load I nput Losses

The f r equency conver t er shal l have no- l oad i nput l osses no gr eat er t han 7 per cent of t he out put kW r at i ng. For a f r equency conver t er t hat r equi r es a t r ansf or mer at t he i nput t o t he uni t , i ncr ease t he speci f i ed no l oad i nput l osses by 2 per cent .

2. 1. 1. 11 Overload/Overcurrent

Sat i sf act or y over l oad/ over cur r ent oper at i ng t i me i s based on no mor e t han one over l oad i n any 4 consecut i ve hour s of oper at i on:

Per cent of Ful l Load Sat i sf act or y Oper at i ng Ti me

110 per cent 60 mi nut es

125 per cent 5 mi nut es

150 per cent 2 mi nut es

200 per cent 20 seconds

Af t er mi ni mum oper at i ng t i me i s achi eved, uni t shal l i nt er r upt out put power . Uni t shal l be capabl e of sust ai ni ng t he over l oad/ over cur r ent wi t hout damage unt i l t he pr ot ect i ve devi ce i nt er r upt s t he overload/overcurrent.

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2. 1. 1. 12 Shor t Ci r cui t

When a bol t ed l i ne- t o- l i ne f aul t , or a bol t ed t hr ee phase f aul t i s appl i ed t o t he uni t , uni t shal l be capabl e of sust ai ni ng t he shor t c i r cui t cur r ent wi t hout damage unt i l t he pr ot ect i ve devi ce i nt er r upt s t he f aul t .

2. 1. 1. 13 Out put Vol t age THD

a. Bal anced l oad:

( 1) Out put vol t age THD: Not t o exceed 5 per cent l i ne- t o- l i ne and l i ne- t o- neut r al f or non- l i near l oads as speci f i ed i n t he Par agr aph ent i t l ed " Load Range" .

( 2) Maxi mum si ngl e har moni c di st or t i on: Not t o exceed 3 per cent of t he f undament al at t he nomi nal vol t age f or non- l i near l oads as speci f i ed i n t he Par agr aph ent i t l ed " Load Range" .

b. Unbal anced l oad: Out put vol t age THD not t o exceed 4 per cent , l i ne- t o- neut r al wi t h 15 per cent unbal anced l i near l oad.

2. 1. 1. 14 Out put Vol t age Ampl i t ude Modul at i on

Out put vol t age ampl i t ude modul at i on shal l not exceed 1/ 2 per cent of nomi nal vol t age at no l oad t o f ul l l oad.

2. 1. 1. 15 Fr equency St abi l i t y

Pr ovi de a hi gh f r equency cr yst al c l ock t o cont r ol out put f r equency of t he 400 Hz conver t er wi t hi n pl us or mi nus 0. 5 per cent f or al l oper at i ng condi t i ons, i ncl udi ng maxi mum and mi ni mum speci f i ed i nput vol t ages, ambi ent t emper at ur e, and r el at i ve humi di t y. The f r equency r egul at i on shal l oper at e i ndependent of suppl y f r equency and l oad changes.

2. 1. 1. 16 Phase Angl e Regul at i on

Di spl acement angl e bet ween adj acent vol t age phases shal l be 120 degr ees pl us or mi nus 2 degr ees wi t h bal anced l oad and pl us or mi nus 4 degr ees wi t h t hr ee phase 15 per cent unbal anced l oad. A 15 per cent unbal anced l oad i s def i ned as:

a. Phase A at f ul l r at ed s i ngl e phase l oad.

b. Phase B at 85 per cent of Phase A.

c. Phase C at 85 per cent of Phase A.

2. 1. 1. 17 Tr ansi ent Out put Vol t age Recover y

I n accor dance wi t h MIL-STD-704 .

2. 1. 2 Envi r onment al Rat i ng

The conver t er shal l oper at e sat i s f act or i l y f r om no l oad t o r at ed f ul l l oad under t he f ol l owi ng condi t i ons:

a. Ambi ent t emper at ur es r angi ng f r om 0 degr ees C t o 55 degr ees C.

b. Rel at i ve humi di t y f r om 0 t o 95 per cent non- condensi ng.

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c. Ambi ent pr essur es f r om sea l evel t o 3, 000 f eet .

2. 1. 3 Moni t or i ng and Cont r ol Panel

Pr ovi de conver t er wi t h a cont r ol panel t hat i s equi pped wi t h t he f ol l owi ng cont r ol s, i ndi cat or s, i nst r ument at i on, dat a l oggi ng, di agnost i cs, and al ar m functions.

2. 1. 3. 1 Controls

a. St ar t / st op pushbut t on.

b. Lamp/ l i ght emi t t i ng di ode ( LED) t est - A push- t o- t est but t on or swi t ch t o t est i ndi cat or l amps/ LEDs.

c. Al ar m si l ence - A swi t ch t hat shal l di sabl e t he audi bl e al ar m.

d. Al ar m r eset - A pushbut t on t o s i l ence audi bl e al ar ms.

e. Emer gency power of f - A separ at e pushbut t on f or emer gency power of f .

f . Ci r cui t br eaker .

g. Out put cont act or ON/ OFF.

h. Out put vol t age adj ust .

2. 1. 3. 2 Indicators

a. I nput power avai l abl e - Lamp/ LED t o i ndi cat e t hat t he suppl y vol t age i s available.

b. Out put power On/ Of f - Lamp/ LED t o i ndi cat e t hat t he conver t er out put vol t age i s avai l abl e.

c. Syst em al ar m - Lamp/ LED t o i ndi cat e t hat a f aul t has been det ect ed.

Thi s i ndi cat or shal l be l at ched i n t he " ON" posi t i on whenever an al ar m condi t i on descr i bed i n Par agr aph ent i t l ed, " Al ar m Annunci at or , " i s det ect ed and shal l r emai n " ON" unt i l t he al ar m r eset pushbut t on i s pressed.

d. I ndi cat i ng l amp/ LED t o i ndi cat e t hat t he al ar m si l ence swi t ch i s i n t he di sabl e posi t i on.

e. Audi bl e al ar m.

f . Out put cont act or " ON" .

g. Ai r cr af t i nt er l ock bypass - Lamp/ LED t o i ndi cat e t hat t he Ai r cr af t I nt er l ock has been bypassed.

2. 1. 3. 3 Di gi t al I nst r ument at i on

Pr ovi de t r ue r ms, pl us/ mi nus one per cent accur acy, mi cr opr ocessor - based met er wi t h a s i mul t aneous t hr ee- l i ne LCD di spl ay. Met er shal l di spl ay el apsed t i me ( i n hour s) . Met er shal l di spl ay a sel ect ed out put phase- t o- phase vol t age, out put phase cur r ent , and out put f r equency. Met er shal l di spl ay sel ect ed out put per cent phase- t o- phase vol t age THD, out put

SECTI ON 26 35 43 Page 9 per cent phase cur r ent THD. Met er shal l pr ovi de THD measur ement t o t he t hi r t y- f i r st or der .

2. 1. 3. 4 Instrumentation

a. El apsed t i me met er s ( i n hour s) .

b. Out put vol t met er sel ect or swi t ch havi ng t hr ee phase t o neut r al posi t i ons f or moni t or i ng wye vol t age out put s i n accor dance wi t h MIL-STD-704 and one " OFF" posi t i on.

c. Out put ammet er sel ect or swi t ch havi ng t hr ee phase posi t i ons and one " OFF" posi t i on.

d. Out put f r equency met er , 395 t o 405 HZ scal e, havi ng a 400 HZ cent er wi t h an ON- OFF swi t ch.

2. 1. 3. 5 Al ar m Annunci at or

The uni t shal l be capabl e of det ect i ng t he f ol l owi ng abnor mal condi t i ons, soundi ng an audi bl e al ar m and i l l umi nat i ng i ndi v i dual i ndi cat or l amp/ LEDs t hat ar e c l ear l y i dent i f i ed:

a. I nput over vol t age.

b. I nput under vol t age.

c. Out put under vol t age.

d. Out put over vol t age.

e. Out put over l oad.

f . Syst em al ar m.

g. Cont r ol l ogi c f ai l ur e.

h. Over t emper at ur e.

i . Logi c power suppl y f ai l ur e.

2. 1. 4 I nput / Out put Devi ces

Pr ovi de f ul l y- r at ed, t hr ee- pol e, UL appr oved devi ces f or cont r ol of 60 Hz i nput and 400 Hz out put f r om t he conver t er . Devi ces and cabl es oper at i ng at 400 Hz shal l be der at ed i n accor dance wi t h I EEE 519.

2. 1. 4. 1 Ci r cui t Br eaker

Conf or m t o r equi r ement s of UL 489. Uni t s oper at i ng at 400 Hz shal l be der at ed f or 400 Hz oper at i on.

2. 1. 4. 2 Out put Cont act or

Pr ovi de conver t er out put wi t h an aut omat i c magnet i cal l y- hel d cont act or wi t h i nt er l ock c i r cui t . Out put cont act or shal l be of suf f i c i ent capaci t y t o handl e r at ed l oad, over l oad, and avai l abl e shor t c i r cui t cur r ent .

Cont act or shal l open when any c i r cui t i dent i f i ed i n t he Par agr aph ent i t l ed " Pr ot ect i ve Cont r ol " causes t he syst em t o shut down. Out put cont act or

SECTI ON 26 35 43 Page 10 shal l be el ect r i cal l y i nt er l ocked wi t h ON/ OFF ci r cui t r y so t hat when t he f r equency conver t er i s shut down, t he cont act or shal l open i mmedi at el y and r emai n open.

2. 1. 4. 3 Ai r cr af t I nt er l ock Ci r cui t

I nt er l ock c i r cui t shal l det er mi ne t he pr esence or absence of t he 28 VDC f eedback s i gnal f r om t he ai r cr af t . I nt er l ock c i r cui t shal l not al l ow t he out put di sconnect t o c l ose i f t he 28 VDC si gnal i s not pr esent . I f t he out put di sconnect i s c l osed when t he 28 VDC i s l ost , t he di sconnect shal l open wi t hi n 2 seconds. Conver t er shal l cont ai n t er mi nal bl ock poi nt s f or t he connect i on of t wo 12 AWG wi r e f r om t he ai r cr af t cabl e assembl y f or t he i nt er l ock c i r cui t . I nt er l ock c i r cui t shal l not dr aw mor e t han 20 mi l l i amper es f r om t he ai r cr af t ' s 28 VDC ci r cui t . For t est i ng pur poses, pr ovi de a swi t ch i nsi de t he conver t er wi t h t wo posi t i ons:

a. Nor mal - For ai r cr af t l oads.

b. Bypass - For t est i ng wi t h dummy l oad or no l oad, or f or use wi t h ai r cr af t wi t h no 28 VDC.

2. 1. 5 Pr ot ect i ve Cont r ol s

Pr ovi de c i r cui t r y f or t he f ol l owi ng pr ot ect i ve cont r ol s.

a. I nput under vol t age.

b. I nput over vol t age.

c. Loss of phase.

d. Loss of i nput power .

e. Door i nt er l ock - When any access door i s opened, t he i nt er l ock c i r cui t r y shal l open t he 60 Hz i nput devi ce and 400 Hz out put devi ce and not al l ow t he i nput or out put devi ce t o c l ose. For mai nt enance pur poses, pr ovi de a bypass swi t ch t o def eat t he i nt er l ock c i r cui t r y .

f . Out put over vol t age - Pr ot ect by t r i ppi ng out put devi ces f or i nst ant aneous over vol t age of 30 per cent or mor e and f or 10 t o 30 per cent over vol t age l ast i ng mor e t han 0. 25 second.

g. Out put under vol t age - Pr ot ect by pr event i ng t he c l osi ng of t he out put di sconnect unt i l t he out put vol t age i s 95 per cent of t he r at ed out put .

I f , af t er c l osi ng, t he vol t age decr eases t o bel ow 90 per cent f or l onger t han 5 seconds, pr ovi de r el ayi ng t o t r i p out put devi ces ut i l i z i ng a f i el d- adj ust abl e t i me- del ayed ci r cui t wi t h a r ange of 4 t o 10 seconds.

h. Out put f r equency - Pr ot ect by t r i ppi ng out put devi ces f or f r equency change i n excess of pl us or mi nus 5 per cent of t he r at ed out put f r equency ( 400 HZ) .

i . Out put over l oad.

j . Conver t er over t emper at ur e pr ot ect i on.

2. 1. 6 Aut omat i c Li ne Dr op Compensat i on

Pr ovi de aut omat i c l i ne dr op compensat i on - 0 t o 7 per cent adj ust abl e

SECTI ON 26 35 43 Page 11 internally.

2. 1. 7 Bui l t - I n Test Equi pment

Fr equency conver t er shal l i ncl ude bui l t - i n t est equi pment whi ch moni t or s bot h pr i mar y c i r cui t s and pr ot ect i on c i r cui t s of t he uni t . Pr ovi de v i sual i ndi cat i on t o assi st di agnosi s of uni t f ai l ur es t o a modul ar l evel .

Pr ovi de v i sual i ndi cat i on of conver t er st at us usi ng cabi net mount ed l i ght emi t t i ng di odes.

2. 1. 8 Acoust i cal Noi se

Maxi mum cont i nuous acoust i cal noi se l evel shal l be 72 dBa ( A wei ght ed scale).

2. 1. 9 Assembl y Const r uct i on

Pr ovi de encl osur es sui t abl e f or i ndoor envi r onment s i n accor dance wi t h NEMA 250, Type l . Ar r ange t o pr ovi de r equi r ed l ouver s, cool i ng ai r , ent r y and exi t pr ovi s i ons f or equi pment wi t hi n encl osur es. Const r uct uni t ( s) so t hat component s, wi t h t he except i on of cont r ol and moni t or i ng component s, ar e t ot al l y encl osed wi t hi n t he encl osur e. El ect r oni c c i r cui t s i nc l udi ng power c i r cui t s shal l be modul ar const r uct i on r eadi l y accessi bl e f or mai nt enance, r epai r and modul e r epl acement f r om t he ext er i or of t he encl osur e. Pr ovi de per manent i dent i f i cat i on t ags f or wi r i ng. Uni quel y i dent i f y each wi r e. Use t he same i dent i f i cat i on syst em i n t he wi r i ng di agr ams i n t he Oper at i on and Mai nt enance Manual . Pr ovi de each encl osur e wi t h a f i ni sh coat over a subst r at e whi ch has been pr ovi ded wi t h a r ust i nhi bi t i ng t r eat ment . Col or shal l be t he manuf act ur er ' s st andar d col or .

2. 1. 10 Nameplates

As speci f i ed i n Sect i on 26 00 00. 00 20 BASI C ELECTRI CAL MATERI ALS AND

METHODS.

2. 2 AI RCRAFT POWER CABLE ASSEMBLY

For 400 Hz wi r i ng at 200Y/ 115 vol t s, pr ovi de 7- conduct or t ype cabl e conf i gur ed as 6 phase conduct or s ( 2xA, 2xB, 2xC) t i ght l y wound ar ound t he cent er l ocat ed neut r al , t wi st ed and j acket ed i n accor dance wi t h SAE AS5756/ 6 r at ed f or 300 amper es. Pr ovi de cont r ol cabl i ng i ncl uded wi t hi n t he j acket f or i nt er l ock c i r cui t and aut omat i c l i ne dr op compensat i on. Ter mi nat e cont r ol wi r i ng on accessi bl e t er mi nal bl ocks i n uni t . Pr ovi de cabl e assembl y wi t h i nt egr al l y mol ded 400 Her t z mal e connect or ai r cr af t pl ug i n accor dance wi t h MS 25486- 17. Cabl e/ connect or assembl y shal l be sui t abl e f or sever e dut y. Cont act t er mi nat i ons shal l be cr i mped.

2. 3 SOURCE QUALI TY CONTROL

2. 3. 1 Conver t er Test Schedul e

The Gover nment r eser ves t he r i ght t o wi t ness t est s. Pr ovi de f r equency conver t er t est schedul e f or t est s t o be per f or med at t he manuf act ur er ' s t est f aci l i t y . Submi t r equi r ed t est schedul e and l ocat i on, and not i f y t he Cont r act i ng Of f i cer 30 cal endar days bef or e schedul ed t est dat e. Not i f y Cont r act i ng Of f i cer 15 cal endar days i n advance of changes t o schedul ed date.

a. Test I nst r ument Cal i br at i on.

SECTI ON 26 35 43 Page 12

( 1) The manuf act ur er shal l have a cal i br at i on pr ogr am whi ch assur es t hat al l appl i cabl e t est i nst r ument s ar e mai nt ai ned wi t hi n r at ed accuracy.

( 2) The accur acy shal l be di r ect l y t r aceabl e t o t he Nat i onal I nst i t ut e of St andar ds and Technol ogy.

( 3) I nst r ument cal i br at i on f r equency schedul e shal l not exceed 12 mont hs f or bot h t est f l oor i nst r ument s and l eased speci al t y equipment.

( 4) Dat ed cal i br at i on l abel s shal l be v i s i bl e on al l t est equi pment .

( 5) Cal i br at i ng st andar d shal l be of hi gher accur acy t han t hat of t he i nst r ument t est ed.

( 6) Keep up- t o- dat e r ecor ds t hat i ndi cat e dat es and t est r esul t s of i nst r ument s cal i br at ed or t est ed. For i nst r ument s cal i br at ed by t he manuf act ur er on a r out i ne basi s, i n l i eu of t hi r d par t y cal i br at i on, i nc l ude t he f ol l owi ng:

( a) Mai nt ai n up- t o- dat e i nst r ument cal i br at i on i nst r uct i ons and pr ocedur es f or each t est i nst r ument .

( b) I dent i f y t he t hi r d par t y/ l abor at or y cal i br at ed i nst r ument t o ver i f y t hat cal i br at i ng st andar d i s met .

2. 3. 2 Rout i ne Fact or y Test s

Rout i ne t est s shal l be per f or med by t he manuf act ur er on each of t he act ual f r equency conver t er ( s) pr epar ed f or t hi s Pr oj ect t o ensur e t hat t he desi gn per f or mance i s mai nt ai ned i n pr oduct i on. As an except i on, aut omat i c l i ne dr op compensat i on shal l be t est ed on onl y one uni t on mul t i pl e uni t or der s. Submi t t est r epor t s, by ser i al number and r ecei ve appr oval bef or e del i ver y of equi pment t o t he Pr oj ect Si t e.

For t est s whi ch r equi r e f ul l l oad, use 1. 0 power f act or unl ess ot her wi se not ed. Al l measur ement s shal l be t r ue RMS measur ement s. Measur ement s shal l be obt ai ned i n accor dance wi t h I EEE 1159. Test s shal l i ncl ude t he following:

a. I nput cur r ent and power f act or : Oper at e conver t er at l ow, nomi nal and hi gh i nput vol t age at f ul l l oad. Measur e and r ecor d i nput vol t age, i nput power f act or and i nput cur r ent i n each phase.

b. Out put vol t age, out put vol t age THD, out put cur r ent , out put power f act or , and vol t age r egul at i on: Oper at e conver t er at nomi nal i nput vol t age f or :

( 1) 50 per cent of r at ed capaci t y wi t h 0. 8 l aggi ng power f act or l i near load.

( 2) 100 per cent of r at ed capaci t y wi t h 0. 5 l aggi ng power f act or , 0. 8 l aggi ng power f act or , 1. 0 power f act or , and 0. 8 l eadi ng power f act or l i near l oads.

( 3) 50 per cent of r at ed capaci t y wi t h t he non- l i near l oad as speci f i ed i n t he Par agr aph ent i t l ed " Load Range" .

SECTI ON 26 35 43 Page 13

( 4) 100 per cent of r at ed capaci t y at l ow and hi gh i nput vol t age.

( 5) 100 per cent of r at ed capaci t y wi t h t he non- l i near l oad as speci f i ed i n t he Par agr aph ent i t l ed " Load Range" .

( a) Oper at e f or not l ess t han 10 mi nut es at each t est condi t i on i n ( 1) , ( 2) , ( 3) , and ( 4) above and not l ess t han 30 mi nut es at t est condi t i on i n ( 5) above. Moni t or and r ecor d out put vol t age, out put vol t age THD, out put cur r ent , out put cur r ent wavef or m, out put power f act or and f r equency at t he begi nni ng and end of each t est condi t i on. Moni t or and r ecor d out put vol t age s i ngl e har moni c di st or t i on f or each t est condi t i on i n ( 2) and ( 5) above at t he begi nni ng and end of each t est condi t i on. Ver i f y out put r emai ns wi t hi n speci f i ed r egul at i on l i mi t s.

c. Ef f i c i ency: Oper at e at nomi nal i nput vol t age at hal f l oad and f ul l l oad at 1. 0 power f act or . Measur e and r ecor d i nput vol t age, i nput cur r ent , i nput power f act or , out put vol t age, out put cur r ent , and out put power f act or . Cal cul at e t he uni t ef f i c i ency.

d. No l oad l osses: Oper at e at no l oad and nomi nal i nput vol t age. Measur e and r ecor d i nput vol t age, i nput cur r ent , i nput power , i nput power f act or , and out put vol t age.

e. Bur n- i n Test : Bef or e del i ver y, bur n- i n al l uni t s under f ul l l oad condi t i ons f or at l east 24 hour s. Bur n- i n t est shal l be per f or med wi t h t he conver t er encl osur e door s c l osed and al l vent i l at i on i n t he f i nal oper at i ng condi t i on.

f . I ncl ude har moni c f r equency spect r um anal ysi s depi ct i ng Har moni c Or der and Har moni c Magni t ude at t he uni t ' s i nput and out put t er mi nal s dur i ng f ul l l oad THD t est i n t est r epor t s.

g. Aut omat i c l i ne dr op compensat i on: Oper at e conver t er at nomi nal vol t age at:

( 1) No- l oad.

( 2) 50 per cent of r at ed capaci t y wi t h a 0. 8 l aggi ng power f act or l i near l oad.

( 3) 50 per cent of r at ed capaci t y wi t h t he speci f i ed non- l i near l oad.

( 4) 100 per cent of r at ed capaci t y wi t h a 0. 8 l aggi ng power f act or l i near l oad.

( 5) 100 per cent of r at ed capaci t y wi t h t he speci f i ed non- l i near l oad.

( a) Loads shal l be connect ed t o t he conver t er wi t h t he speci f i ed ai r cr af t power cabl e assembl y. No adj ust ment s t o t he f r equency conver t er shal l be al l owed bet ween l oad t est s. Moni t or and r ecor d out put vol t age at t he l oad end of t he cabl e. Ver i f y speci f i ed per f or mance of t he l i ne dr op compensat i on.

2. 3. 3 Speci al Fact or y Test s ( Desi gn Test s)

Submi t speci al f act or y t est ( desi gn t est ) r epor t s ( compl et e wi t h t est dat a, expl anat i ons, f or mul as, and r esul t s) , i n t he same submi t t al package as t he

SECTI ON 26 35 43 Page 14 cat al og dat a and dr awi ngs f or each of t he speci f i ed f r equency conver t er ( s) . Test s shal l be cer t i f i ed and si gned by a r egi st er ed pr of essi onal engi neer . Test s shal l be on f i l e based on a pr oduct i on model of conver t er s of t he same desi gn, const r uct i on and kVA r at i ng pr ovi ded.

As an opt i on, t he manuf act ur er shal l t est one uni t at t he same t i me schedul ed f or r out i ne t est s, of each r at i ng and si ze conver t er t o assur e compl i ance wi t h t he Speci f i cat i on. For al l t est s whi ch r equi r e f ul l l oad, use 1. 0 power f act or unl ess ot her wi se not ed. The t est s shal l i ncl ude t he following:

a. Sur ge pr ot ect i on: Appl y i nput sur ges i n accor dance wi t h I EEE C62. 41. 1 and I EEE C62. 41. 2, Locat i on Cat egor y B and moni t or out put . Conduct a mi ni mum of t hr ee consecut i ve successf ul t est s on each uni t l i s t ed.

Conf i r m t her e i s no i nt er r upt i on t o 400 Hz out put power and vol t age st ays wi t hi n speci f i ed r egul at i on t ol er ances. Sur ge pr ot ect i on t est s shal l be appl i cabl e on al l f r equency conver t er uni t s ut i l i z i ng same sur ge pr ot ect i on devi ce by manuf act ur er and par t number r egar dl ess of f r equency conver t er kVA si ze.

b. I nr ush cur r ent : Af t er appl y i ng power t o t he conver t er , conduct a mi ni mum of t hr ee i nr ush cur r ent t est s at f ul l l oad. Pr ovi de copi es of wavef or m and THD anal ysi s i n t est r epor t .

c. I nput cur r ent di st or t i on: Oper at e at nomi nal i nput vol t age at f ul l l oad. Measur e and r ecor d t he i nput cur r ent THD f or t he cur r ent i n each phase.

d. Over l oad/ over cur r ent : Oper at e at nomi nal i nput vol t age wi t h l oads l i s t ed bel ow:

Per cent of Ful l Load Mi ni mum Oper at i ng Ti me

110 per cent 60 mi n

125 per cent 10 mi n

150 per cent 2 mi n

200 per cent 20 sec

( 1) Moni t or out put t o conf i r m t her e i s no 400 Hz power i nt er r upt i on.

Af t er mi ni mum oper at i ng t i me i s achi eved, uni t shal l i nt er r upt out put power .

e. Shor t - c i r cui t : Appl y a bol t ed l i ne- t o- l i ne, and bol t ed t hr ee phase f aul t di r ect l y t o t he out put t er mi nal s of t he uni t . Conduct a mi ni mum of t hr ee consecut i ve successf ul t est s on each uni t . Pr ovi de uni t capabl e of car r y i ng t he f aul t cur r ent unt i l t he i nt egr al syst em pr ot ect i ve devi ces i nt er r upt s t he f aul t wi t h no damage t o t he uni t .

Pr ovi de wavef or ms of shor t c i r cui t cur r ent dur i ng shor t c i r cui t t est s.

f . Out put vol t age THD: Oper at e at nomi nal i nput vol t age at f ul l l oad wi t h bal anced and 15 per cent unbal anced l oad. A 15 per cent unbal anced l oad i s def i ned as f ol l ows:

( 1) Phase A at f ul l r at ed s i ngl e phase l oad.

SECTI ON 26 35 43 Page 15

( 2) Phase B at 85 per cent of Phase A.

( 3) Phase C at 85 per cent of Phase A:

( a) Measur e and r ecor d t he out put vol t age THD f or t he l i ne- t o- neut r al vol t age of each phase.

g. Phase angl e r egul at i on: Oper at e at f ul l l oad wi t h bal anced and 15 per cent unbal anced l oads. Measur e and r ecor d di spl acement angl e bet ween adj acent out put vol t age phases. A 15 per cent unbal anced l oad i s def i ned as f ol l ows:

( 1) Phase A at f ul l r at ed s i ngl e phase l oad.

( 2) Phase B at 85 per cent of Phase A.

( 3) Phase C at 85 per cent of Phase A.

h. Tr ansi ent r ecover y: Oper at e at t he f ol l owi ng l oad st eps: 0 t o 100 per cent , 0 t o 50 per cent , 100 t o 0 per cent and 50 t o 0 per cent .

Measur e and r ecor d r ecover y t i me and out put vol t age devi at i on l i mi t s.

Pr ovi de r ecor di ngs or di spl ay of out put vol t age dur i ng t r ansi ent r ecover y t est .

PART 3 EXECUTI ON

3. 1 INSTALLATION

I nst al l pr oduct s t o oper at e at 400 Hz i n t he same manner as speci f i ed i n ot her sect i ons of t hi s Speci f i cat i on f or pr oduct s oper at i ng at 60 Hz, unl ess i ndi cat ed or speci f i ed ot her wi se. Conf or m t o t he r equi r ement s of NFPA 70 and I EEE C2 and t o manuf act ur er ' s i nst r uct i ons and r ecommendat i ons.

3. 1. 1 Equipment

3. 1. 1. 1 Fl oor Mount ed

Pr ovi de pr oper f l oor mount i ng channel s and i nst al l i n accor dance wi t h t he manuf act ur er ' s dr awi ngs and i nst r uct i ons and as i ndi cat ed. Al i gn, l evel , and bol t or wel d uni t s t o channel s t o al l ow easy wi t hdr awal or i nser t i on of r emovabl e component s and t o per mi t pr oper oper at i on and mai nt enance of equipment.

3. 1. 2 Grounding

I n accor dance wi t h NFPA 70 and as speci f i ed i n Sect i on 26 20 00 I NTERI OR

DI STRI BUTI ON SYSTEM.

3. 1. 3 Wi r i ng and Condui t

3. 1. 3. 1 Bui l di ng Wi r i ng

Pr ovi de Type XHHW or THHN wi t h st r anded copper conduct or s wi r i ng f or 400 Hz ci r cui t s. Pr ovi de wi r i ng f or 400 Hz ci r cui t s i n non- magnet i c condui t , al umi num or PVC. Pr ovi de wi r i ng and condui t f or 60 Hz ci r cui t s as speci f i ed i n Sect i on 26 20 00, I NTERI OR DI STRI BUTI ON SYSTEM.

SECTI ON 26 35 43 Page 16

3. 1. 3. 2 Conduit

Use al umi num condui t f or exposed f eeder s. Do not i nst al l al umi num condui t under gr ound or encased i n concr et e. Use al umi num f i t t i ngs and boxes wi t h al umi num condui t . For under gr ound or concr et e encasement use PVC.

3. 1. 4 Manuf act ur er ' s Repr esent at i ve

The manuf act ur er ' s r epr esent at i ve shal l pl ace t he syst em i n oper at i on and make necessar y adj ust ment s t o ensur e opt i mum oper at i on of t he equi pment .

The manuf act ur er ' s r epr esent at i ve shal l have at l east 2 year s of pr act i cal exper i ence i n t he i nst al l at i on and t est i ng of 400 Hz sol i d st at e f r equency converters.

3. 2 FI ELD QUALI TY CONTROL

3. 2. 1 Instruments

Pr ovi de t est i nst r ument s capabl e of measur i ng and r ecor di ng or di spl ayi ng t est dat a at a hi gher r esol ut i on and gr eat er accur acy t han speci f i ed f or t he conver t er ' s per f or mance. The t est i nst r ument s used i n t he f i el d t est s shal l have cur r ent val i d cal i br at i on st i cker s i ssued by an appr oved cal i br at i on l abor at or y. Ver i f y cal i br at i on and adj ust ment s of conver t er i nst r ument s pr ovi ded pr i or t o f i el d t est s. I nst r ument s shal l be cal i br at ed f or 400 Hz oper at i on when measur i ng 400 Hz si gnal s.

3. 2. 2 Per f or mance of Accept ance Checks and Test s

Per f or m f i el d t est s and conduct i nspect i ons. Pr ovi de l abor , equi pment t est s i nst r ument s, and i nci dent al s r equi r ed f or t he t est s i ncl udi ng l oad banks, except t he Gover nment wi l l f ur ni sh el ect r i c i t y. For al l el ect r i cal l oad t est s, use 1. 0 power f act or .

Per f or m i n accor dance wi t h t he manuf act ur er ' s r ecommendat i ons and i ncl ude t he f ol l owi ng v i sual and mechani cal i nspect i ons and el ect r i cal t est s.

3. 2. 3 I ni t i al I nspect i on and Test s

a. Compar e equi pment namepl at e i nf or mat i on wi t h Speci f i cat i ons and appr oved Shop Dr awi ngs.

b. I nspect physi cal and mechani cal condi t i on.

c. I nspect al l bol t ed el ect r i cal connect i ons f or hi gh r esi st ance usi ng l ow- r esi st ance ohmmet er , ver i f y i ng t i ght ness of accessi bl e bol t ed el ect r i cal connect i ons by cal i br at ed t or que- wr ench met hod, or per f or mi ng t her mogr aphi c sur vey.

d. Per f or m speci f i c i nspect i ons and mechani cal t est s as r ecommended by manufacturer.

e. Ver i f y cor r ect equi pment gr oundi ng.

f . Per f or m r esi st ance measur ement s t hr ough al l bol t ed connect i ons wi t h l ow- r esi st ance ohmmet er , i f appl i cabl e.

3. 2. 4 Per f or mance Test s

Conduct conver t er per f or mance t est s under t he super vi s i on of t he

SECTI ON 26 35 43 Page 17 manuf act ur er ' s r epr esent at i ve. Successf ul l y compl et e t he pr el i mi nar y oper at i on, cont r ol and pr ot ect i ve devi ces check pr i or t o per f or mi ng l oad and t r ansi ent t est s. I f t he conver t er f ai l s t o oper at e wi t hi n t he speci f i ed l i mi t s dur i ng any of t he per f or mance t est s t he Cont r act or shal l di scont i nue t he t est and shal l make necessar y r epai r s t o cor r ect t he f ai l ur e and r est ar t t est i ng of t he conver t er .

3. 2. 4. 1 Pr el i mi nar y Oper at i on

I nspect t he conver t er and make adj ust ment s necessar y t o assur e pr oper oper at i on i n accor dance wi t h t he manuf act ur er ' s i nst r uct i ons. Oper at e f r equency conver t er at 0, 25, 50, 75, and 100 per cent of r at ed f ul l l oad.

Measur e and r ecor d t he out put vol t age, cur r ent , f r equency, and THD at each l oad. Cal cul at e out put vol t age r egul at i on. Ver i f y conver t er i s oper at i ng wi t hi n speci f i ed l i mi t s at each l oad l evel .

3. 2. 4. 2 Cont r ol and Pr ot ect i ve Devi ce Checks

Oper at e each cont r ol , swi t ch, i nput / out put devi ce t hat i s capabl e of bei ng oper at ed manual l y a mi ni mum of t hr ee t i mes, demonst r at i ng sat i sf act or y oper at i on each t i me. Per f or m oper at i on t est on each pr ot ect i ve devi ce t o ensur e t hat devi ces f unct i ons pr oper l y. Af t er each oper at i on measur e and r ecor d t he conver t er out put f r equency, vol t age and cur r ent . Ver i f y conver t er i s oper at i ng wi t hi n speci f i ed l i mi t s.

3. 2. 4. 3 Load Test

Oper at e each uni t cont i nuousl y a mi ni mum of 2 hour s at 100 per cent r at ed l oad. Measur e and r ecor d t he conver t er out put f r equency, vol t age and cur r ent . Ver i f y conver t er i s oper at i ng wi t hi n speci f i ed l i mi t s. Load t est shal l be per f or med wi t h t he conver t er door s c l osed and t he l oad connect ed t o t he conver t er wi t h speci f i ed ai r cr af t cabl e assembl y.

3. 2. 4. 4 Tr ansi ent Test s

Tr ansi ent r ecover y: Oper at e at t he f ol l owi ng l oad st eps: 0 t o 100 per cent , 0 t o 50 per cent , 100 t o 0 per cent , and 50 t o 0 per cent . Pr ovi de r ecor di ngs or di spl ays of vol t age and f r equency dur i ng each t r ansi ent t est , and i ndi cat e on t he r ecor di ngs and di spl ays t he t i me i nt er val s and accept abl e l i mi t s f or vol t age and f r equency. Repeat each t r ansi ent t est t hr ee t i mes, r ecor d t he r esul t s of each t est . Ver i f y conver t er i s oper at i ng wi t hi n speci f i ed l i mi t s.

3. 2. 4. 5 Har moni c Di st or t i on Test s

Per f or m out put vol t age har moni c di st or t i on t est s at t he out put of t he conver t er t er mi nal s at 0 per cent l oad and 100 per cent l oad at uni t y power f act or . The Cont r act or shal l pr ovi de t est equi pment and i nst r ument at i on r equi r ed f or t he t est s. Test s shal l be conduct ed wi t h a di st or t i on anal yzer wi t h t est l eads wi t hi n 3 f eet of t he f r equency conver t er ' s out put t er mi nal s. Test dat a shal l i ncl ude t ot al har moni c di st or t i on ampl i t udes of al l i ndi v i dual har moni cs pr esent ed i n a spect r um anal ysi s f or mat up t o t he 37t h or der .

3. 2. 4. 6 Aut omat i c Li ne Dr op Compensat i on

Conduct aut omat i c l i ne dr op compensat i on t est s on each conver t er wi t h t he l oad connect ed t o t he conver t er wi t h t he speci f i ed ai r cr af t power cabl e assembl y. Oper at e each conver t er at no l oad, 50 per cent and 100 per cent of

SECTI ON 26 35 43 Page 18 t he r at ed capaci t y. No adj ust ment s t o t he f r equency conver t er shal l be al l owed bet ween l oad t est s. Moni t or and r ecor d out put vol t age at t he l oad end of t he cabl e. Ver i f y speci f i ed per f or mance of t he l i ne dr op compensation.

3. 2. 5 Gr oundi ng Syst em

I nspect gr ound syst em f or compl i ance wi t h Cont r act Pl ans and Speci f i cat i ons.

3. 2. 6 Fol l ow- up Ver i f i cat i on

Upon compl et i on of accept ance checks and t est s, t he Cont r act or shal l show by demonst r at i on i n ser vi ce t hat c i r cui t s and devi ces ar e i n good oper at i ng condi t i on and pr oper l y per f or mi ng t he i nt ended f unct i on. As an except i on t o r equi r ement s st at ed el sewher e i n t he Cont r act , t he Cont r act i ng Of f i cer shal l be gi ven 5 wor ki ng days advance not i ce of t he dat es and t i mes of checki ng and t est i ng.

3. 3 DEMONSTRATION

3. 3. 1 I nst r uct i ng Gover nment Per sonnel

Pr ovi de f i el d t r ai ni ng t o Gover nment per sonnel on t he oper at i on and mai nt enance of t he conver t er pr ovi ded. Pr ovi de f i el d t r ai ni ng 2 weeks pr i or t o t he schedul ed dat e f or f i el d accept ance t est s. As a mi ni mum t he t r ai ni ng shal l i ncl ude 2 hour s of i nst r uct i on on t he t heor y of oper at i on and 4 hour s on t he r epai r and mai nt enance of t he conver t er s. The i nst r uct or shal l be appr oved by t he manuf act ur er of t he uni t pr ovi ded.

Submi t t r ai ni ng syl l abus i ncl udi ng each t opi c of t r ai ni ng and a br i ef out l i ne of each t opi c t o t he Cont r act i ng Of f i cer at l east 4 weeks pr i or t o t r ai ni ng f or appr oval . Tr ai ni ng shal l be appr oved by t he Cont r act i ng Of f i cer at l east 2 weeks i n advance. The Gover nment may r ecor d, v i deo and audi o, t he t r ai ni ng sessi ons and use t hese r ecor di ngs t o t r ai n per sonnel on t he oper at i on and mai nt enance of t he conver t er syst em. Pr ovi de t wo copi es of v i deo or audi o t apes, i f used i n t he t r ai ni ng sessi ons, t o t he Cont r act i ng Of f i cer .

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