BSTJ 30: 1. January 1951: Internal Temperatures of Relay Windings. (Peek, R.L., Jr.)

3 MB·English

Internal Temperatures of Relay Windings
By RL PEEK, J

ete thera na sme it et er

via ne
Sar or te a hes

Israuuncrion
MMERICL: kas deorkasl an expression for he steady state tm
pevturedievibstinn ins magnet sil weve he hea: ow is holy
Tadiat and the femprraeren of He fone: le uae ne tae 08
‘Siace sever wien race the eae of rays ab ete rect meagre
Cetin fe epvnesarteing spp te hese ce, the rv rosie
te ea invr nie. Hoge ievitadraen Fw she cal gartly by ovation
hough “his ret ath, aad partly by dition from the ler sara,
In conempenvt nf thin, the temps ores of Cg inner and ler sf
ae ix. gener lice
Teche srl val switeog maumel pele, primary inet stains
othe ate ate ws fest nav ThRagh thor ep, a6 er
Fronbive fles detemrines the wasn serspeaiore stained with
Ir ovis The ean ot ont ned below I vr erly to dete te
Aivsion of Four benees Lose tpt, aul forthe seaation 0° er
Pin! eomsar so Tat otal, he coustaul a° Fen estimating
fg celaton hetwcen she ‘rvs ar a the mind wl yer >
lid ti

‘Asin Referens 1), hs cessed chal refs ne emt est Dame she
cago te iy a hat a erpemaeyecdiont keh i, are tha
Foe cetmily etergengons oil srwtase ca be tele ss orm
‘Thor iQ be bent spoked ger ai vetmre pe wait ts, and Fs
tcmea wombs, the Hada Gistriatine ef anette fs rhe en
tion ts Tob: tain

ee

a
we +on6 0
17 es wer ssne vimmsest Jowiiad, pies IEE

cre ris the spestinate af a sauce of tupesntare 7. The gone se
‘on te egation £15 gen by a2 eatin

Pade Binge, &
wshece A cal Bare cate detevinad “yy Ce nwnley onion
‘The templar fy aimessy al Psa one rain ich The

tenaperacunearione 7dr — 0. Subecitating che emtesin for T ven
‘by equation (243 eae condita, ie fod cat

a

1 he snes For gion hy minnie at in cgmton 2,
ful ft ke tken a given by ton tlting exoresion fer when ¢—

‘Shnon nS ") .

‘This quis aes the genoa exes faethe ee. oraare ciate

interme thesaiue al ol the amature hee i amar vale
Pen ie special se i abies he tenet ave 324 Ue ier alos
he curs lla Hl ae ei li ir (4 of
yy r= ae aloe nm cspnesiow Ge 7. Fe thew there cn be
Solana Ce sn ean, fe ie alae 7 atv emg
ocr in Refs 2) co this apeca ase the atin al hee WS.

we ofss «

tox!

Sebstite on thier fr fr cai {2 reo mpm oe
P= Theis etal wh Liver cei 08 of Weer (

wf piv ve mutiny ft, nkogmon oF 2
Pde noe flere hes al line Wi te Dyn = Bh

The oi uu pez eal a ives Ce lla expen fo He mea

cases
ing? het gy 2)

o

Ty ema of retin {0 laren re masiemats may be a=
Aymel(erelermise he Ware onlay gn hese: eat eae)
uae SEMESHADUMLE OF RELAY HASDISOE Ms

‘toes the ines and outer sufeces of the cel. IF tar ke Aw fehl
ala, all the Beal opp a pet Ligh on or the other oF these
Suraces, The vicion sche Heat betwen he svg pha ie detersined by
ne alow rf masta leperatur. The rae of est Bow to Ce core
iethorne the ate hast sapoly yer unis vole Q, alps by he
Yolure of che ea side the uics or "= pect gif val
Similar the rate of st Rw through ater ane pet egal
1 rte ally pile ete ie he a As io by mss

ing the temperntane ise bn ony an eel the ii aia te
perature diecely from it, Waen this is Core i sowed that fe tempera
fore gradient ie compart Hn im he wei y of he nar a)

that ti thereftedifieus so mensarer’ dinette An ries deter aion
of che radius # ary be sade, howorer, by deterring G2 masimun
eres iure Tul ictenpeat es ars Pratl als respectively
Examine foe To st Peat tne rs eats by Hts —
fn the one cae end re nthe aches. Tex fan thes Ovo expeseons

pt ieshi-()

BP Tae = (BY °
svstalagrai sing nf oqatoe 9) Pr whan lcs

the use of aleve pot othe tetion FE} — AF ag 8 — 2 Toe
evetesr af she ght hae side equstin (is 17), and ie do
rena: 3 F gyi)

“A conseniest oracle for doterrining the terpenitane eitibaton
‘within a coil sto aeaeure ce nesistance anges ia dee avers, raping
the sail becsces tase Layers. It ther is moze thr. oe ayer beewecs ap,
‘eres'tunes change meses he-rean narnia" hres inl

For ar securatedete-rvinaion oe rai, He ner tt ae

ve rositince mansicenes's on compuestive basi ae DY Use of the
‘ye ciuit shows ia Fig. 1. Hee the terminals mexkedO and 6 ae the
limer and auter ends of ho wineing, while cemiaals 1 w 5 devote ape
at nsemediate ayer With he key X te Postion 2, the brzge cet may
Te balasced to esis che sesstance between teinale 0 and 4 fer
snl, elatve to it ete tetas § aad 6. The reise of the
‘vacle iting ney be determines sith evens accurney (about ene per
cent) Ey valtusterammeter readings mice ith Xin Portion 1, With
hi knots, the rsistane of Une lagers eee asa hence the tee
jesse linens ca be eyed onthe ke eg.
Twn ar srerex reeuucat soomvat, povcany $651

iv temperature cutesponding to the resistin Velen taps may be
Terrains the aan Seaive ofthe layers ineladed. The

—————ti

2 |S wel 8
S|

Ti 2-Temvemar cso fh gt

salts of sioh mencinarants ray he pleted es showa in Fig. 2. The
recat gn in TFs Sune wise bad with a sample of the Vera
‘Magnet of tse Westee Elete’s Corany’s 197 (Step byStes) switch.
The plotct olnts show “he mean tmperste of thc layers between tie
plored ageiae: Ge'r ‘wean radius, the dsshed buréary Las Se Uhe
fer sec outer sea of the eo, Lae ailfeeat eaves eutepond te the
Aiieeeal else arly tate pore fg ea

Tisaqanert ig. 2 a there ef ach ares ieomponatvely
‘ut, a Chat i. el Gereare be eit va detecrine the adie of
tncinu tempers wt. Wye ite as ng Lt te me
tv tomar kot realy fp exes 9 the ean femgratac, ZDis
justifes the ual enginsting pructice of ting she sean tsmpectuse asa
eehan nf @heer eco i verneste m

beeper # ie be
Frvnnsavt nieve n Fige 2 hens nap al He anne aman

sal iets Fane Ty ak ry ~ 1622 oan wil — 118 a re
fpcetiely, comespondiag to the use aud outer sais plated. These
rerrpeaties ate listed in Tabse Teogtier wit he estespanding vals of
{Grebe power ing dive thew me heel 1.2m), Loa acee

"he Te le ut mimes epee ba ay erect by
mer sr ae With hoe the nly © ens song
‘oe mwtion A) fo ie se 4 Te reli vba
ae K tne inte fy Table Tyg Ue wale of 7 the deter, the

‘Tis of Ce hea Meta Ua gosto she soce sa tl ng I the
‘ower wae cll with che eau ws a Me tab, The sl
dre usd fy the ale comgicati aa, a8 iafiatal i Ff, sora
teeth eal, Tahing ate ure of aus cotespeading Uy Le Woe wa
cover nud especively, the cerpestures ar eee sureces were compe ed
Hane ere SNAP TReMcak JOUAAL, JATARY TOE

@

from enous (Py ua che values sly fowl Sw, Pand & These

com an eve sanperstor ae nll Teble

Trin sume tnteres to evar te leenvee values of pane
vhvtisity Ke As Us tempest clifeeaces or she en ome Pou mea
Srornte are ama, tae rs foe the ofr 0 eae are a
Ve i give a vl for of aptly WS XIU axis pe
ver ns ie ets I sia fort wound es using ND. 2 wie, the solu
evan by th insulsion i wovnatly 36 percent, As he rorhasle
the eopper is veey Ize corps! wick thet =the insalsion. the Ow
Mlueviy of she Ite maybe eauanatos maf Peer ol A eid
“ef herve" vlnme supe she oso, Tiewics a idigsed
Cenc vhs aetna tae onder of 3% 10-eluie 95 per
feepee cs which ie abou the ames alu Oy paper

soca EE

[For engintcing puupues toe reas fifa ices rs ae fo the
tyne of Lee leaving “he wie aul he aovee Tae n= Tals T
‘hor hat te ban: sabe eel vlad berween tha oko baths
Bethe care wef att hal he ever toda, the ae of bea Alt
Tiecave pec ua ace of wire salut ce hat aw aeea a the
crass,
"Tac snes of eal romoval por it anes cough the inner 2! er
suuface ne sin ietiegeghngt ve ores onc apres it Fg
Seat nL ne seen Ve elation betven the cat of Beat real j= wa
fon and temples i oppor ly sven, aad intersece the temp
fre avis HPL: CIDE, rich eur the niet ssopectre ie toe
Tolle tha for ergo ngs the ante af Peat eval poe ut
area vem either tbs inves orn aaay Be ken 2 pra
tothe dileraws etneea the siace ard ambient terperataves. sar
Finer auroiestcn hs been foul ly ABB for over ely ane este
cullen rvsntet under cenit recaotative 9 elephous appt
Tecunge of Pac mule of rown’ig conditions ard the eles of
rena INOTRAYYEOS OF NeLAY vaNDLNGS io

coueting an mais ng paths by which bea: is removed, iis difcule te
“cubis relationship ne te ues i Fi Sty raya te ache
fof heat removal, Rer given morning eal ios, howe, he wean hip
Can be determin empire the proracareoarlinel above a! woe to
fetite ta hent removal fron given si) mali cer rnin for
Which sch measuertents have been mace,

Te ate of beat renova ie thue measured by tie slopes ofthe bent fw
vs. tempera curves, whien maybe desgraiot yard fe Tos & i the
tine rate af hest lw tothe core par spne centimeter of aarare er °C
cierense betoen the inter ext turlace and he ambien temparstunes,
While is he eurmppling oot for Ue ever surface, For che case

‘.0045 warts per en perC, ae = 16020 wats
Der emt per °C, This becrved val of i chanelerite uf che cover sur
Faves of coi moni eephone apres, wbete the heat reval is
primarily by radation lo surfs st or or the ambient, lemperatre
‘While the val of & observe for ince inrerenetative of hat applying
In inrer el snes the value fy oe us surfaces vary wiley ad a

Shawn in Fis 3

Irtcusly emitve to variatona i the clare betwee. the atalc
‘ore ud the iter susaceufthe cll

Paeaconn oF Cou Truresarcnet
1 ears the at ern ite kin th tin of
tecpertate wil ths el fra geen wl wele poo Ft ry be
tcc ton cation) The peer input a2 the al one deter
tne the a of heat sly ot uni ose QTae neo beat oto ke
{ete per nit.angh of ell theo" 7). @ Therese ers
lezen tavegh hich ths heat pes 2 en wm che ep ear
‘eatin beeen the Mat sieved andthe ssa aod ambien texpes
nen @ome .
n-n-@oa te)
where Tris Be Sow ambient temperate. Sil, for the exer
n-n- aw 0)
Uy keting thee expiant fo 7 a; ot T in equton
vue tae su oe ea he of, Cie obaied an x
Iveta for? och cess othe loaning eqeatin

®
MMB rm enc sine TheURHEAL JOMANAL, TOEERY 19H

67 ie thus dtermice, wre 1° 5 row From ansarements of ar
vol, 7" ana be determined by rane feutios (4 rom the vals of Fy
tr Ts gver ly stiona (8). Mf dee, the mean texperatue F can ten
be deerme bp equate (6).

Coserrsnone

In most relay nt sy onguet cos, af he sype used telepone
spparacs, the he! hn ander ead state conditions cas be considered ae
holy radik aad Ue eniperstaeeietebation conforms aggrosirtely bn
Caation (8 ave In inexpressoa, 7" f the mixin temperate, and
‘heros! whi this west 0 tat Ast generate ini thewerkace
of raivs pases to Ee ore, uth ener tse his adios passes
fo thecover The tet of aot removal pean csr at elthero thee sarees
Js fount wsperinentally to be npproviately proportional to the dierence
betvean Ga stfce nari! Iergertunes lor che tempercure Tange
tf norval operation) "Tne prowrl tality smmtant i the heat renova
Foes (of of ettion (6). Caer cuntion types of telephone
pparacs, this eels int is the onder of DAO? wate per expe °C for
‘Never sree, ar 0.05 wats par emt per "tor amine sree lose
Proinisy to the metal cue. HLe Lent renown) eoeficiers for an inner
Eltfeo ix mush wre variable Cia that for a cove sear

“The col temperstinsistribution ‘epeation 2] cepende pan the rae uf
heat easply per wait wuune Q, aad upor te ection Pet oondaeneisy
1B )ormy lake a eel 19 the tol slely sine paver apa livked
by the oll vvuan, Cennsten aigat ema for the rage vat in
resulting fou ae vviation in copper reiki temperature. Tao
Felatively anal tenpentcame range verve in practic, a¢ Mlustated by
The reaultso: Hig. 2, mer Ini seiccseay eedaerent, The heat cor-
Aliity constane & fear eetive average ete, applying 19 the <0 ns
Though it were omyerenns steture Te converieneyevelsted by
measurements of ace! ei, als apeoiatly corstant ior m given
vie see ed type of Snot

‘By measarerent of the rsnance changes in tapped cil, tke intcnal
tesperatare dirivlion ean be detemmized. Hom this, values of the
(Mfstive hoe conduetivisy K and of the hea rome cole by sal
yan be determined By the usr of eqntion (1, deer lve, Cate
‘pesely if K and she beet removal soeicents are now, equstin (4) mey
he wee fo estimate the inter! lerperstue distribution, and thes the
mean til mesial temperatures,