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Hitachi H20-T Technical Notes

Magnetic starters and contactors
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H H H H ITAC
ITACH H H H I I I I M M M M AGNETIC STARTERS
ITAC
ITAC
AND CONTACTORS
AND CONTACTORS
AND CONTACTORS
AND CONTACTORS
TECHNICAL NOTE
TECHNICAL NOTE
TECHNICAL NOTE
TECHNICAL NOTE
H it a ch i In du st r ia l E qu ipm en t Syst em s Co., Lt d.
AGNETIC STARTERS
AGNETIC STARTERS
AGNETIC STARTERS

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Summary of Contents for Hitachi H20-T

  • Page 1 H H H H ITAC ITAC ITAC ITACH H H H I I I I M M M M AGNETIC STARTERS AGNETIC STARTERS AGNETIC STARTERS AGNETIC STARTERS AND CONTACTORS AND CONTACTORS AND CONTACTORS AND CONTACTORS TECHNICAL NOTE TECHNICAL NOTE TECHNICAL NOTE TECHNICAL NOTE H it a ch i In du st r ia l E qu ipm en t Syst em s Co., Lt d.

  • Page 3: Table Of Contents

    CONTENTS 1. OUTLINE ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1 Types of St a rt er, Con t a ct or an d Th erm a l Overloa d Rela y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1 St a n da rds for St ar t er, Con ta ct or a n d Ther ma l Over loa d Rela y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1 S er vice E n vir on m en t ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・...
  • Page 4 4. CONTACTOR RE LAY ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・33 Types of Con t a ct or Rela ys ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・33 P er for m a n ce ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・33 Con t a ct or Rela y wit h Twin Con t a ct ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・34 Con t a ct Relia bilit y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・35 5.

  • Page 5: Outline

    1. OU TLIN E 1-1 TYP E S OF STARTE R, CONTACTOR AND TH E RMAL OVE RLOAD RE LAY Th e t ypes of st a r ter, con ta ctor a n d t herm a l over loa d r ela y a r e list ed below. Ta ble 1.

  • Page 6: Se Rvice E Nvironme Nt

    J a pa n J E M 1038 AC E lect r om a gn et ic Con ta ctors Non e J IS C8201-5-1 Low-volt a ge switch gea r a nd con tr ol gea r Non e - P ar t 5-1 : Cont r ol cir cu it devices a n d swit ch in g elemen ts - E lectr om ech a nica l con t rol circu it devices J E M 1356...
  • Page 7 (2) Adver se ser vice en viron men t (a ) H igh am bien t t emper at u r e: Wh en t h e st a r t er a n d con t a ct or a r e u sed a t a n a m bien t t em per a t u r e h igh er t h a n t h e t em per a t u r e of t h e n or m a l s er vice con d it ion , it is n ecess a r y t o t a k e in t o con s id er a t ion t h e r ed u ct ion of loa d cu r r en t les t t h e t em p er a t u r e (a m bie n t t em p er a t u r e + t em p er a t u r e r is e) of t h e m old ed p a r t a n d t er m in a l e xce ed t h e m a xim u m a llowa b le t empera t u re a nd u se of h ea t-resistin g wir e.

  • Page 8: Contactor

    2. CONTACTOR 2-1 STRUCTURE AND OP E RATION 2-1-1 St a n da r d Type Cont a ct or (1) St r u ct u r e Th e con t act or is r ou gh ly composed of t h e followin g 3 pa rt s. (a ) P a rt of cont a ct : Pa r t t hr ou gh wh ich a cu rr ent pa sses, a nd at which a circu it is opened a n d closed.
  • Page 9 F ig 1. H 35 (H orizon ta l Plu n ger t ype) F ig 2. H 300C (Link-st r uct u re)
  • Page 10 (2) Oper a t ion F ig. 3 Wh en a pplyin g volt a ge t o t h e coil, t h e elect r om a gn et is excit ed a n d t h e m ovin g cor e is a t t r a ct ed t o t h e fixed cor e, t h en m oves in t h e dir ect ion of t h e a r r ow.

  • Page 11: F Eat U Res Of Link St R U Ct U Re

    2-1-2 F eat u res of Link St r u ct u re Wh en usin g t h e lin k st r uct ur e for a lar ge-ca pacit y model, ・ t h e sh ock t o t he m ou nt in g boa rd given by t he opera t ion of t h e cont a ct or becom es sma ll; ・...

  • Page 12: Lat Ch Ed Con T Act Or

    2-1-3 Lat ch ed Con t act or F ig. 8 Open con dit ion Fig. 9 Closed condition La t ch ed con t a ct or h a s two coils, on e is for closin g a n d t h e ot h er is for r elea sin g. Th e st r u ct u r e of t h e la t ch ed con- t a ct or is sh own in F ig.

  • Page 13: Dc Oper A T Ed Con T A Ct Or

    F ig. 11 Direct inpu t coil t ype F ig. 12 Dou ble coil t ype (1) Dir ect inpu t coil t ype Beca u se of t h e t em per a t u r e r ise of t h e coil, DC elect r om a gn et is la r ger t h a n AC on e, t h u s DC oper a t ed con ta ct or is h igh er t ha n AC oper at ed on e.

  • Page 14: P Er For M A N

    (E xpla n at ion) (1) Wh en BS a is clos ed, cu r r en t flows a s (＋) → BS S → BS a → 52b → (CC) → (－) a n d is excit ed on ly a t (CC) coil a n d pick ed up.
  • Page 15 Ta ble 6. Tem per a t ur e-r ise limits for insu lat ed coils in air (IE C 60947-4-1) Cla ss of in su la t in g m a t er ia l Tem per at u r e-r ise lim it (m ea sur ed by r esist a nce va r iat ion) 85 K 100 K...
  • Page 16 (2) Ma k in g a nd br eak in g capa cit ies Th e con t a ct or is defin ed by it s m a k in g a n d br ea k in g ca pa cit ies in a ccorda n ce wit h u t iliza t ion ca t egor ies specified in Ta ble 5.

  • Page 17: Ch A R A Ct Er Ist Ics ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・13

    Th e test s a re ca r ried out at t h e fr equ ency of oper at ions corr espondin g t o t h e cla ss of in term itt ent du t y. F ollowin g t h e t est s of m ech a n ica l en d u r a n ce, t h e con t a ct or s h a ll st ill be ca pa ble of com p lyin g wit h t h e oper a t in g con dit ions.

  • Page 18: Oper A T In G Tim

    (i) t h e iron core of t h e electr om a gn et is da m a ged by a st r on g sh ock, a n d th e fat igu e of molded par ts a n d pr essed p a r t s becom es gr ea t er , wit h t h e r es u lt t h a t t h e m ech a n ica l en d u r a n ce of t h e con t a ct or is s h or t en ed by a pproxima t ely 50%.

  • Page 19: Su Ppr Ession Of Coil Su R Ge Volt A

    F ig. 14 E xam ple of closin g t im e (2) Differen ce between AC a nd DC oper at ions Th e closin g t ime of AC oper a t ed cont a ctor a n d th e double coil t ype DC oper at ed one is sh ort , a n d t h a t of t h e dir ect in pu t t ype DC oper at ed on e is lon g.

  • Page 20: P Ower Con S U M Pt Ion ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・16

    2-3-4 P ower Con sum pt ion Wh en ca lcu lat in g t he in-boa rd temper at u r e r ise of t h e con t rol boar d, swit chboa rd, et c., t he power con sum pt ion of t h e equ ipm en ts used m ust be consider ed.

  • Page 21: Vibr A T Ion -Pr Oof Ch A R A Ct Er Ist Ics ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・17

    F ig. 15 E ndu r a nce t o over-cur r ent 2-3-6 Vibr a t ion -pr oof Ch a r act er ist ics Wh en a st ron g vibr a t ion is a pplied t o t he m ou nt in g boa rd, t h e con ta cts of t he con ta ctor a n d t he t h erm a l over load r ela y m a y ca use ma lfu nct ion .

  • Page 22: Applica T Ion A N D Select Ion ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・18

    2-4 AP P LICATION AND SE LE CTION Th e con t act or s sh ou ld be select ed a ccor din g t o t h e t ypes of t h eir loads. Th e loads a re classified in IE C60947 as shown in t he followin g t a ble, a n d in clu de th ose of t h e tr a nsfor mer, con den ser, et c.
  • Page 23 Ta ble 14. Select ion of st ar t er an d cont a ct or for m ot or (As to ma in it ems) It em Gen er a l st a n da r d for select ion Motor St a rt er a nd St a nda r d for...
  • Page 24 (3) E lect r ica l endu r a nce cu r ve Wh en lon g elect r ica l en dur a n ce is r equ ir ed, select elect roma gn et ic con t act or s usin g followin g en du ra n ce cur ve. (a ) AC200V class m otor (AC3) F ig.

  • Page 25: Applica T Ion Of Ac4 (Applicat Ion Of Cases In Cluding In Ch In G A Nd P Lu Ggin

    2-4-2 Applica t ion of AC4 (Applica t ion of Cases In cludin g In ch in g an d P lu ggin g) In equ ipm en t a n d m a ch iner y which in clu de inch in g a n d plu ggin g (n egat ive-ph ase bra k in g), m ak e a n d break of la r ge st ar t in g r ush cu rr en t of t h e mot or will occur fr equ en tly.
  • Page 26 (a ) P h ase-cu rr en t det ect in g met h od 3 Con ta ctor Met h od F ig. 19 Con nection dia gr a m Ta ble 17. Select ion (P h ase-cur r ent det ect in g m et h od) Motor St a rt er for Con t a ct or for...
  • Page 27 (b) Lin e-cur r ent detectin g m et h od 3 Con ta ctor Met h od F ig. 20 Con nection dia gr a m Ta ble 18. Select ion (lin e-cu rr en t det ect in g m et hod) Motor Con t a ct or for Con t a ct or for...

  • Page 28: Applica T Ion For Con Den Ser Loa

    2-4-6 Applica t ion for Condenser Load Wh en closin g t he con denser cir cu it , t h e electr ic ch a r ge Q = CE of t he con denser cor r espon din g t o t h e inst a nt an eou s va lu e of power sour ce volta ge at closin g of cir cuit is pr om ptly supplied, a n d r ush cu rr ent flows.
  • Page 29 Ta ble 20. Applica t ion to openin g/closin g of prim ar y side of t r a nsfor mer F r a m e Sin gle-ph ase t ra n sform er A (k VA) 3-ph ase tr a nsfor mer A (kVA) 200 ～...

  • Page 30: Th E Rmal Ove Rload Re Lay ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

    3. TH E RMAL OVE RLOAD RE LAY 3-1 STRUCTURE AND OP E RATION 3-1-1 St a nda rd Type (1E ) a nd P h ase F a ilu r e P r ot ect ed Type (2E) (1) E xt er n a l st r u ct u re F ig.

  • Page 31: P Er For M A N

    (3) Oper a t ion (a ) Oper a t ion of 1E t h erm a l over load r ela y As s h own in F ig. 24, t h e t h er m a l over loa d r ela y con t a in s a n over -cu r r en t det ect or con s ist in g of bim et a ls, a n d h ea t er s, a n d a con t a ct a ct u a t ed corr espon din g t o bim eta ls.

  • Page 32: Applica T Ion A N D Select Ion ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・28

    3-3 AP P LICATION AND SE LE CTION Select ion of t h er m a l over loa d r ela ys m u st be det erm in ed by t ak in g in t o con sider a t ion t h e t ype of m ot or , r equ ir ed fu n ction, t ype of loa d a n d st ar t in g met h od, et c.

  • Page 33: Select Ion For Ver Y Sm A Ll Ca Pa Cit Y Mot

    F ig. 25 Motor t em per at u r e-r ise r at io a t Fig. 26 Motor t em per a tu r e-r ise r at io a t ph a se-fa ilur e ph ase-fa ilu r e oper at ion Wh en a str ict ph ase-fa ilu r e pr ot ect ion is necessa r y t h at in clu des a lso su ch a specia l case as over-cu rr en t flows only t o l wir e at t h e seconda r y side due t o ph ase-fa ilu r e at t he pr im a r y side of t h e t ra n sform er , 3-elemen t t h erm a l over loa d r ela y or 2E t h erm a l over load r ela y shou ld be select ed.
  • Page 34 Th e st a r t in g t or qu e becom es ext r em ely sm a ll, so t h a t st a r t in g will be im possible u n less t h e load is a con sider a bly ligh t on e.

  • Page 35: In Ch In G A N D P Lu Ggin G Oper A T Ion ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・31

    3-3-4 In chin g a nd Plu ggin g Oper at ion Sin ce frequ ent in chin g a nd plu ggin g oper a tions a ct u a te t h e t h erm a l over loa d r ela y, con t in uou s oper at ion becom es im possible .
  • Page 36 F ig.28...
  • Page 37 4. CONTACTOR RE LAY 4-1 TYP E S OF CONTACTOR RE LAYS Refer to ca t a logu e pa ge 38. 4-2 P E RFORMANCE Th e perform a n ce of t h e con t act or r ela y is su bject ed to t ests a ccordin g t o t h e test in g con dit ion s specified by sta n dar ds (IE C, J EM, et c.), a n d m ust sa t isfy th e valu es set fort h in th em t o secur e gu ar a nt ee.
  • Page 38 ･ Nor ma l condit ion s of use Th e n orm a l u se of a cont a ct or r ela y is t o close, m a int a in a n d open circu its wh ich con t ain a n elect rom a gnet t h e m agn et ic cir cuit of wh ich is open at t h e t im e wh en t h e coil cu rr en t is m ade a n d closed wh en t h e coil cu rr en t is br ok en.
  • Page 39 4-4 CONTACT RE LIABILITY Th e m a ps of cont a ct r elia bilit y of cont a ctor r ela ys a r e as shown in F ig. 31 a n d F ig. 32.
  • Page 40 5. MOU NTIN G AN D CONN E CTION 5-1 MOUNTING 5-1-1 Mou nt in g St at e Th e st a rt er a n d cont a ct or sh ou ld in pr inciple be mou n t ed on a fla t ver t ica l pla ne as sh own in Ta ble 27. If circum- st a nces dem a n d, t h ey m a y be m ou n ted wit h a t ilt , forwa rd or ba ckwar d, a nd r igh t or left , of at m ost 15 degr ees.
  • Page 41 5-1-2 Clam pin g Tor qu e of Mou nt in g Scr ews Th e st a rt er a nd cont a ctor shou ld be secur ely m ou n t ed t o a fla t su r fa ce wit h t he fixin g scr ews st at ed in th e dim ensions colum n of t h e cat a logue.
  • Page 42 5-2-3 Con nection of Th er m al Over load Rela y wit h CT Wh en CT side is V-conn ect ed, 2 set of CT can m ak e 3-ph ase pr otection . Th en, in order t o ensu re corr ect oper a t ion , m ak e wir in g a s sh own in F ig.
  • Page 43 F ig.37 Con n ect ion dia gr am Fig.38 Mou n tin g of CT a n d wir in g 5-2-4 Con nection Wh en Sin gle-P ha se or DC Mot or is Applied Wh en usin g t h e th erm a l overload rela y t o a sin gle-ph ase m otor or DC m otor con nection shou ld be m a de as sh own below in or der t o m ain t ain t h e oper a tin g perform a nce of t he t herm a l over loa d rela y.
  • Page 44 Th e 3-elem ent t h erm a l over load r ela y is so a djusted t h at it ca n n orm a lly opera t e in a sta t e wh ere cu r ren t flows t o a ll 3 elem en ts.
  • Page 45 6. H AN DLING MAINTE NAN CE AN D IN SP E CTION 6-1 STORAGE AND CONVE YANCE St a rt er, cont a ct or a n d th erm a l overloa d rela y sh ou ld be stor ed or ca r ried u n der t h e followin g con dit ions. Ta ble 29.
  • Page 46 Ta ble 30. In it ia l in spect ion Tim e of init ia l inspection Ma jor inspect ion it ems ･ Ch eck wh et her scr ews ar e fu lly tigh t ened. St a rt in g t im e of Im m ediat ely oper at ion befor e...
  • Page 47 (b) P eriodica l inspect ion it em s Th e per iodica l in spect ion sh ou ld be ca r ried out for th e it em s given in Ta ble 32. Ta ble 32. P eriodica l inspect ion it em s P er iodica l inspection it em Con t en ts of inspection ･...
  • Page 48 P er iodica l inspection it em Con t en ts of inspection ･ Wh en t he con t act is bla ck en ed: E ven if som ewh a t black en ed, n o t rou ble occu rs; h owever , if t h e blacken in g is a bn or ma l, th er e m a y be a pr oblem a bout t h e a tm ospher e, so t h at in vestiga t ion a nd cou nt erm easu res sh ou ld be...
  • Page 49 Ta ble 33. Wear of cont a ct s Mode Simple wea r P eelin g wea r Tr a n sit in g wea r Cr a ck wear Con ditions of Gen er a l wea r. Th is wea r t ak es place in Th is wea r is often fou nd Th is wea r is fou nd in con t acts...
  • Page 50 Wh en it is n ecessa r y t o r epla ce t h e con t a ct of on e of t h r ee ph a ses, t h e con t a ct s of a ll ph a ses sh ou ld be r epla ced a t t h e sa m e t im e.
  • Page 51 (14) Aft er a n a cciden t cu rr ent flows, do n ot u se t he switch with ou t check in g. In vest iga t e t h e ca u se of a cciden t t o r em edy it , a n d a lso con fir m t h a t t h e equ ipm en t is fr ee fr om da m a ge ; t h en , u se t h e swit ch a gain .
  • Page 52 Th er e is a ca se of ph a se fa ilu r e. In vest iga t e t h e ca u se a n d r epla ce t h e fu se wit h one wit h a cor r ect Melt in g of power sou r ce fu se ca pa cit y.
  • Page 53 Th er m a l over loa d r ela y Reset it . oper a t es. Set t h e cu rr en t va lu e wit h loa d cu r ren t , or repla ce Miss -select ion of t h er m a l t h er m a l over loa d rela y.
  • Page 55 H it a ch i In du st r ia l E qu ipm en t Syst em s Co., Lt d.

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