EENAC STANDARD

G1—1, 1958

.

LIST OF CONTENTS

Page

StandardBasic Inxpulse Insulation Levels..... . e..... .i . ••. •.. .. . . ........ .. . 1Methods of Making Tests......... .. .. .. . . . . . . ...... .. . ..... . . ..... ........ ... 2Tolerances on Dimensions..... ... . ..... ,,.......... ..... ... . . . . ..... ... ...... 2Sixty Cycle Dry FlashoverRating............................................ 2Impulse (Critical) Flashover Rating.. . .. ...... . . e .. .~•. ... . . . .. ..... ....... 2SixtyCycleDryWithstandTestVoltageflating.......,....................... 2I.trpulseWithstand Test Voltage Rating....................................... 3Sixty Cycle PunctureVoltage Rating.. ... . . .. . . . . ..... .. .. . . ..... ...... ...... 3Radio Influence Voltage Test................................................ 3MechanicalStrengthRatings...... ..... ... ... ......... ..•......... ..•........ 4Threacls....,...........................,.................................... 4LeakageDistanceRating., .. . . . .. .. ..... . . .. . . ...... .... ..... .. ... .. ... . a.... 4Dxy Arcing DistanceRating........ .. . ... ... ... ... •... .... ... ... . ....... ..... 4Colour of PorcelaJn......................................................... 5Sixty Cycle Dew FlashoverRating... . ... .. . . ......•. .. ... ... .......... . . . •... 5Indoor Insulator Units, Electrical Characteristicsand Heights............. 5Dew Flashover Tests.... .. . .... . . . .~ .... .. . .. . ... . . . . ..... .. ..... ........... 5Indoor Insulator Unit Construction... . . . . . ., . . ... ... . ... . . . . . .. .. ...•... .... 5Studs.... .... ...... .. .. .. .... ..................... .. ................•....... 6Tablel, FrontConnectedIndoor InsulatorUnits............................. 7Table2,RcarConnectedlndoorlnsulatorUnits.............................. STable 3, Type A Indoor Insulator Tjnits..........,........................... 9Table 4, Type B Indoor Insulator IJnits...............,...................... 10Sixty Cycle Wet FlashoverRating....... .. .......... ........ . . . . ......... . ... 13..Sixty Cycle Wet Withstand Rating. ... ... . . ..... .. . ... . ..... . . .......... . ... . . 13,Sub—Basesfor Switch and Bus Insulators...., ....,. .. .......•.. ............. 13..Net Weight. •. .,,.,., . ,.. , ..... .. . . , . ... .., ., ,. .,.... ... ..... . .. ..... ... a.... 11StrengthofFittingsforOutdoorBusSupports............................... UN~uxitingof Insulators.................,........,........................... 1.2Table 5, Outdoor Cap and Pin Insulator Characteristics...................... 33Table6, OutdoorPostlnsu3atorCharacteristics.,......,.................... 15A~ptor P]..ates............ ~ 16

.CEMA SPECIFICATION

for

INDOOR AND OUTDOOR SWITCH AND B1..~

INSUlATORS

0]. Issue No. 1, 1958

COPYRIGHT CANADA 1958BY

Canadian Electrical ManufacturersAssociationToronto

This publication or part thereofmay be copied without changeprovided duecredit is given to Canadian Electrical ManufacturersAssociation. TheSpecification contained in this publication -was prepared by CEMA SwitchgearSection and it has been submitted to Canadian StandardsAssociation pursuantto CEMA By Laws.

Nov~nber 28, 1958 Price — ~2.5O the Copy

SWITCH AND BUS INSULATOR STANDARDS

FRONT AND REAR CONNECTED

INDOOR AND OUTDOOR INSULATORS

1. Standard Basic Impulse Insulation Levels

Standard basic impulse insulation levels shall be:

Reference Basic ImpulseClass Level

KV KV

1.2 302.5 455.0 607.5 (8.7) 75

9515 11023 15034.5 20046 25069 35092 450115 550138 650161 750196 900230 1050287 1300345 1550

Note: Attention is called to the fact that devices carrying a powerfrequency voltage rating which is numericafly the same as the“Reference Class” are not necessarily required to have thecorresponding impulse level given in the table.

~cx In the case of indoor insulators, those having 95 KV and 110 KVimpulse test values are known as class 15L and 15H respectively.

Sections 2 to 12 indicate the procedure to be followed in checking theratings and tolerance of insulators.

Nove~nber 28, 1958

2. !4~thodsof Making Tests:

When checking ratings or making acceptance tests the. methods used shallhe those apnl:,ring to the test involved as given in A.I.E.E. StandardNo. 41, Insulator Tests, or the latest revision thereof.

3. Toleranceson Dimensions:

The dimensions given on the drawings are maximum designdimensionsestablished for standardization purposes. The maximum diameters shallnot exceed 103 percent of the values given. The top and bottom surfacesof the insulator unit shall be parallel within 1/32 inch, measured atthe bolt circle diameter. The allowable variation in the height of theunit shall not exceed 1/32 inch plus or minus.

4. Sixty Cycle Dry Flashover Rating:

The rated 60 cycle dry flashover of an insulator is an assignedvalueapplied by the manufacturer to indicate its performance under standardatmospheric conditions. When check tests are required, tests shall bemade on three units. strings or stacks, and the rating shall be consideredchecked if the average of three test results shall be not less than 95percent of the rated value.

5. ~~~p~1se(Critical) Flashover Rating:

The impulse (critical) flashover rating of an insulator is an assignedvalue applied by a manufacturer to indicate its performance under standardatmospheric conditions at a specified polarity. When check tests arerequired, tests shall be made on three units, strings or stacks, and therating shall be considered checked if the average of three test resultsshall be not less than 95 percent of the rated value.

6. Sixty-Cycle Dry Withstand Test Voltage Rating:

The sixty cycle dry withstand test voltage rating of an insulator isa test voltage assignedby the manufacturerwhich may be applied for aperiod of one minute under standard atmospheric conditions withoutflashover or puncture. The insulators shall be set up in accordancewith the section in AIEE Standard No. 41, “Specimen Mounting forElectrical Test”, paragraph 41-50 to 41—56, inclusive. When check testsare required, not more than three units or stacks of the type involvedshall be submitted to the test. The rated test voltage corrected foratmosphericconditions at the time of the test shall be applied for oneminute. If no unit or stick tested flashes over or punctures, the require-ment for the lot involved shall have been met.

2 November 28, 1958

7. I~pp1seWithstand Test Voltage Rating:

The impulse withstand test voltage rating of an insulator is the crestvalue of an impulse voltage of a specified wave form assignedby themanufacturerwhich can be applied to the insulator under standard atmos—pheric conditions without disruptive discharge or puncture of the insulator.

The insulators shall be set up in accordancewith the section in AIEEStandard No. 41, “Specimen Mounting for Electrical Test”, Par. 41-50to 41-56, inclusive. When check tests are required, not more than threeunits or stacks shall be selected at random from the lot involved andthe rated test voltage corrected for the atmospheric conditions at thetime of test shall be applied in accordance with Par. 41-203, AIEEStandard No. 41 or latest revisions thereof. If the units selected

withstand the test under the conditions therein, the requirements for thelot involved shall have been met.

8. Sixty~CyclePuncture Voltage Rating:

The sixty cycle puncture voltage rating of an insulator is an assignedvalue apolied by the manufacturer to indicate its performance under thestandard conditions specified in the methods of test. When check testsare required, not more than one unit per thousand of the lot involvedshall be selected at random and submitted to the test. The averagevalueobtained shall be not less than the rating and no single value shall beless than 90% of the rating.

9. Radio Influence Voltage Test

The radio influence voltage values given in the tables apply only to newinsulators tested in the factory and they are the maximum micro-voltratings when tested at the indicated test voltage to ground, the testto be made in accordancewith NEMA Publication No. 107 and AIEE StandardNo. 41 or latest revisions of either. The 60 cycle rms test voltagevalue are approximately 10 percent higher than the line—to-ground voltageat which the insulators are usually operated.

The limits for other apparatus and apparatusutilizing these insulatorsshall be established by standards for such apparatus.

When check tests are required, not more than one percent of the lotinvolved shall be selected at random and submittedto the test. Ifnone of the units tested exceedthe rated value the requirements for thelot involved shall have been met.

November 28, 1958 3

10. Mechanical Strength Rating~

The mechanical cantilever, torsion, tension and compressionstrengthratings of a unit, stack or string, where they apply, are assignedvalues for these strengths, applied by the manufacturer to indicatethe performance under the specified test methods. When check tests arerequired, not more than three units per thousand may be selected atrandom to be tested in whatever proportion the purchaser desires forthese various types where they apply to the insulators involved.

Where two or more tests of one kind are involved, the average shall beequal to or in excess of the rating and no single value shall be lessthan 85 percent of the rating. In case a single unit is tested, thevalue obtained shall be not less than 85 percent of the rating.

11. Threads

Internal or external threads shall have a usable length at least equal

to one diameter, except where specified to the contrary.

12. Leakage Distance Rating:

The leakage distance rating of an insulator is the sum of the shortestdistances measured along the surface of the insulator between the metalparts when arranged for the dry flashover test. If high resistancecoatings are applied, such coatings shall be considered as effectiveleakage surfaces and leakage distance over such surfaces shall be in-cluded in the leakage distance. When a check of the rating is required,not more than three samples selected at random from the lot involvedshall be measured. If the average of the measurement so obtained is notless than 97 percent of the rated value, the requirement shall have beenmet.

13. Dr~Arcing Distance Rating

The dry arcing distance rating of an insulator is the sum of the shortestdistances through air or over the surface between live metallic andgroundedparts of an insulator when arranged for dry flashover test.When checktests of the rating are required, not more than three samplesselected at random from the lot involved shall be measured. If the averageof the measurement so obtained is not less than 97 percent of the ratedvalue, the requirement shall have been met.

4 November28, 1958

14. Colour of Porcelain

The standard colour of porcelain insulators used for air switches and bwisupports, for indoor and outdoor service, shall be brown of a unffor~i colour,not mottled. This includes the present standard trade glazes known as darkmahogany glaze, brown glaze and chocolate glaze.

15. Sixty—Cycle Dew Flashover a~iting

The rated sixty-cycle dew £lashover value of an insulator is an assigned valueapplied by the manufacturer to indicate its performanceunder standard con-ditions of atmosphereithen completely coveredwith condensedmoisture. ~Thencheck tests are required, tests shall be made on three units andthe ratingsshall be considered checked if the average of the three test results shall benot less than90 percent of the rated value.

16. Indoor Insul~xtor Units, Electrical Characteristics and Heights

Indoor insulator units shall have the following electrical characteristics:

Voltage Dew Low Impulse Height HeightRating Flash- Frequency Full. ~Tavo Inches Inches

Over One Minute 1.5X40 ns Const Class Const ClassKV KV,R~ Dry NV Pos. or Neg. — A B

BI~S NV, Crest Dim.4. Dim. 7 Ditri.4.

5 15 19 60 3—]J2 5 — 7—1/27.5 24 26 75 4-1/2 6 6 8—1/215L 26 36 95 6 7—1/2 7—1/2 1015H 30 50 110 7—1/2 9 9 11-1/223 40 60 150 10—1/2 12 12 14—1/2

Note: above 23 NV use outdoor insulators

17. Deir Flashover Tests

Dew flashover tests shall be made either thoroughly covering the insulatorwith condensate from the atmosphere or after thoroughly drenching the insula-tor with a fine spray of distilled water.

18. Indoor Insulator Unit_Construction

The following classes of construction shall be standard:

Class: A—Insert—top and. bottom

B—Insert—top, externally bonded base

Note: These construction classes apply to front connectedinsulators only.

November 28, 1958

19. Studs

Rear connectedindoor air switchesusing these insulators shall beconsideredstandardwith the following studs.

1. Round studs up to and including 1200 amperes.

2, Round or laminated studs at 2000 amperes.

3. Laminatedstuds above 2000 amperes.

6 November 28, 1958

TABLE - 1

CEMA STANDARD FRONT CONNECTED INDOOR INSULATOR UNITS

iMFi.U$E WITHSTANOTEST V~TAGZ WiTH I~A 40 WAVEPOSITIVE AND ~E0ATIVE.

CANTIIjVER STRENGTH RATiNGS ARE GIVEN Z~’ABOVE CAP.

MAAIMtJ~ 0IA~-1ETER FOR CONSTRUCTION(LASS 0—40 UNIT IS ?~.

FEIGHT VARIES WITH V(LTA(E RATING.

THREADS ARZ NATIONAL!. (*ZERICAN) STANDARDTHREADSERIES FREE FIT ((LASS 21A — IRT TOP AND BOTTOMB — iN~RTTOP — EZTERNMJ..Y BONCIO BA~

STRENGTH CLASS

. . .

VOLTA GE

RATING

WIThSTAND HEIGHT

TEST KV IN INCHES>

U,U,

U

C.,

4I--J0>

0

MAX. CIA. 3j

‘a

STRENGTH— POUNDS

MAX.OlA. 4~

A-tO A-20 A—30~

8—40 9—50

zC,

If,

0 ‘C

zz

0.0

STRENGTH — POUNDS

0

C- 0(‘C

a

MAX. CIA. 6

0

C-

C-,

C.- ‘~If,

C)C-,

STRENGTH- POUNDS

MAX. CIA. ?

Id!;STRENGTH— POUNDS

MAX. CIA.

(Ci

(Ci—aI-

I-,

a

OC

.,~ a~ I.,o z

STRENGTH— POUNDS

0

Ui~1

C-

C,

0C’,z

0C/)

0 I

0

0Li‘U-j

Ci

z0

0,Cf

I-,

00,z

If,

p

aI.., ~

0 Z

— — — a — a — — — — — — — — — — — — — — — —

5 4.13 5.5 60 9 3~ 750 1500 1500 0,000 1,000 2,500 2,000 ‘O,OOO

7.5 7.2 8.25 75 26 4~ 6 1,500 3,500 3,000 0,000 3,000 6,000 5,000 30,000 6,000 10,000 8,000 0,000 2,000 l5,a!.3 2,1300 8C,130

IL 13.2 14.5 95 36 6 7~ 1,200 3,500 3,000 20,000 2,500 6,000 5,000 30,000 5,000 0,000 8,000 0,000 I0,0CC1~S,C00 2.333 53,3133

1514 4.4. 15.5 10 50 7~ 9 1,000 3,500 3,000 0,000 2,000 6,000 5,000 30,000 4,000 10,000 8,000 0,000 8,0130 5,333 2,3133 813,33

23 23 26.8 50 60 I0~ 12 1,500 6,000 5,000 50,000 3,0CC 10,000 8,000 0,000 6,13133 s,coa I2,300~ 813,313:

0

Cf

00©

000

1~’OT~:Cap drilling shifted 450 from base drilling may be available but is non Ci21A standard.

. . .TABLE - 2

CEMA STANDARD REAR GONNECTED iNDOOR INSULATOR UNiTS

VOLTAGE>

RAT1NG

~U ——

~I- ~

C- —

o .J0

C’)ClE ~CJ

0~

TESTKV

HEIGHT

IN INCHES

STRENGTH CLASS

A—to A ~Z0 - A :30 8—40 8—50

MAX.OIA. MAX. DIA. 5~ MAX. CIA. 7’ MAX. CIA. 8’ MAX. CIA.

® ®~-—

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0~

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— 0 ClLI Cl) I.’)

— 0C- C- CUZ 0 C- •I~

-

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1000

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2500

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2000

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7.5 7.2 B.2 75 26 4~ 6 6 e~ (SOD 3500 3000 20,000 3000 6000 5000 30,000 6000 10,000 8000 50,033 2,033 5.31313 t2CC2~5C.C13

I~ 13.2 14.5 95 36 6 7~ 7~ 10 1250 3500 3000 20,000 2500 5000 5000 30.000 5000 0,000 0000 50,0313 0,030 I5,0~ IZ.0031:’3.

1514 14.4 15.5

23 25~

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ISO

50

60

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000 3500 3000 20,000 2000

1500

6000

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4000

3000

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I5~G~Z.C04C.333j

o IP1PLt~ WITHSTANDTEST VQ.TAL!~WITH l~ X 40 WAVE POSITIVE AND I~GATIVE.© CANTILEVER STRENGTHRATINGS ARE ~IVEM2k” ABOVE CAP.® NAXIMIs OIN~1ERFOR COL!6TRUCTION (LASS 0-40 UNIT IS 1~.

Ø® IEIGHT VARIES WITH V(LTA~ RATING.(j) TWEADS ME NATIONAl. (A?�RICAN) STANDARD TW~ADSERIES F~ FIT (Q.Ass 2j

A — INSERT TOP AM) BOTTCII

B — INSERT TOP — EXTERNM.t.Y BONZD BASE

NOTE: Cap drilling shifted 450 from base drilling may be available but is non CENA standard.

. .

TABLE - 3

CEMA STANDARD TYPE A CONSTRUCTION INDOOR INSULATOR UNITS

.

STRENGTH CLASS A - 10 A— 20 A — 30 A — 40 A — 50

~0C’)—40~—>r0rnU)C)2~D—4

~z

0~~z

~0Zz~—~ffl

~

~—j-M TAPI11OLU

f-I3 TAP -.3j._W*X

-~-~!~‘T‘-

—‘__L.

fI�TAP~~~~2 801.11 -

~1

-13 TAP1~(

-

4 11012$j- 1$ TAP.~

f-IS TAP ~

~ ~—~-ii~‘~‘5T

c~::::-:::~~ 0C,~.L

—

4-&DLI~.

-.4—4.1*1a—,~--~

~

~~

0~ ~

R0T$I~~”4~

~

f_is m~j~

4 $~,_i$

1-iO TAP

@c-Th”T~ ~“ 0~~_L

.f-I3TAP ~4~-

4

IIo,.Ap~7L~~

NOT RECOUMENDED

USE TYPE 8

CONSTRUCTION

NOT RECOMMENDED

USE TYPE 8

CONSTRUCTION

rn>Z

C)0z~m

C.’f_Il-4

0

NOLIS4

_~ol._f~~j.~

(__1..IIAX

~ ~No~’~’1

tL0._!~.

~

NOT RECOMMENDED

USE TYPE B

CONSTRUCTION

NOT RECOMMENDED

USE TYPE B

CONSTRUCTION

BOLTS

0

CAP 2HOLES-3/6”ON 2’ CIA.I HOLE — I/2IN CENTRE

4 HOLES—3/80N 2” CIA.I HOLE — I/2’IN CENTRE

4 HOLES— I/2”ON 3” DIAI HOLE - 3/4)N CENTRE

BASE

FLANGE

2HOLES-3f8~OU2OIA.I HOLE — I/Z”IN CENTRE

4 HOLES—3/S”0N2 CIA.I HOLE — I/2’IN CENTRE

4-9i1& ON 5” SQUARE

4HOLES—V2”0N3”DIA.I HOLE — 3/4” IN CENTRE

4-9/16 ON 6~’SQUARE

.

--

M4X. STUDDI&iNI(4CHES

1.44X. 0i4 or CLAC.Oo,0Cl.)~/llP6

I~_(5&.7-5Kv-2”115L515H3TOP — 3~’BOTTOM 2J~ I

4~TOP—4~COTTOM ~_ —

NOTE I • 1.0.’ 2~ TORSKVft?-SKV INSULATOR

1.0.’ 2~ FOR 15L& 1511 XV INSULATOR

S STABLE - 4

CEMA STANDARD TYPE B CONSTRUCTIONINDOOR INSULATOR UNITS

NOTE 2’ ia.~ 2} FOR SKV& ?~5tY IwSUt.ATOR

i.o.. FOR (51. S $50 U IRSULtIOR

S

Inserts are normally Ferrous - Non-Ferrous supplied on special order.

20. Sixty-Cycle Wet Flashover Rating

The rated 60 cycle wet flashover value of an insulator is an assignedvalue applied by the manufacturer to indicate its performance understandard conditions of precipitation and atmosphere. When check testsare required, tests shall be made on three units, strings or stacks andthe rating shall be considered checked if the average of the three testresults shall be not less than 90 percent of the rated value.

21. Sixty-Cycle wet withstand test voltage rating of sri insulator is a testvoltage assigned by the manufacturer which may be applied for a periodof ten seconds under standard conditions of atmosphere and precipitationwithout flashover or puncture. The insulators shall be set up in accord-ance with the section in AIEE Standard No, 4.1, ‘tSpecimen mounting forElectrical Test”, Par. 41—50 to 41-56, inclusive. The precipitationshall be as for 60 cycle wet flashover test per AIEE Standard No. 41.When check tests are required, not more than three units or stacks ofthe type involved shall be submitted to the test and the rated testvoltage corrected for relative air density but not for humidity shall beapplied for ten seconds. If no unit or stack tested flashes over orpunctures, the requirement for the lot involved shall have been met.

22. Sub—Bases for Switch and Bus Insulators

Switch and bus insulators designed for use in stacks usually requirea sub-base at the ground end to develop the full flashover voltageof the unit or stack, and sub-bases of suitable length or their equiv-alent, are commonly used in operation. In making 60 cycle and impulse,flashover arid withstand tests on these insulators, such sub-base or itsequivalent, shall be used.

23. Net Weight

The net weights listed in the tables on pages 13 to 15 are maximumdesign weights established for standardization purposes. Net weightsshall not exceed 105 percent of rated values.

24, Strength Class of Fittings for Outdoor Bus Supports

The strength classification for outdoor bus support fittings expressedin terms of the gradually applied load which the fitting shall withstandwithout failure or fracture of any part, shall be as follows:

Nov~nber Z3, 1958 U

Load in Class Applicable BoltPounds Designation* Circle in Inches

2,000 StandardStrength 3 or 54,000 High Strength 5

* Refers to associated insulator class.

In all cases the load shall be applied to the fittings in a plane parallelto that of its mounting surface and the line of action of the load shallbe perpendicular to the length of the conductor and coincident with itscenter line.

25. Mounting of Insulators

The mounting position of standard insulator units or stacks of insulatorunits for outdoor devicesshall be:

Up to and including 115 KV - Vertical or Horizontal

Above 115 KY - Vertical *

* Where it is necessary to mount a stack of insulator units rated 161 KYhorizontally because of arrangement limitations, it is recommendedstack Technical ReferenceNo. 26 be used.

12 November2S, 1958

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1CCC*IC)1C4)1

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C_ICC1tC_CCCC_’IfCC_C

0,C_C)Ol’)’C •~C* IC_U” 0)1(0 CC) ‘I) 14) C’. I’.’U”C 0,0,0, CC(C)

— — — — CC_C) * 1)1-N

‘.1~)

~~

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C

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CC,’OCC)C,CC CC-t’0”’Ci’”C CC) C1)CCCC’.’CC

1C”

.‘C~’C”)l C’) .,.,,.CC)0~1C(0

NNC)CICICICICC ‘0 CCCC)C’)CC)CC)t*2~~

—— ~

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IiCClC’.CC.~ C) CC’CICCC)CC(0

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— I 1*00CCC)IC’C CIC,) UlItC)C_1NNC* C’** 1’~ C_I0*0C)C)N(0~~ -I

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. .

TABLE — 5 Coat.

I

NOTE f—The following bolt arrangements are standard:

3-inch bolt circle’—’Four ‘/t’inch’—13 (NC) bolts or capscrllws at ¶10 (legreell,

5-inch bolt circle—Four ~‘inch——1 1 (NC) bolt, or rapScrews at 90 degrees,

7’incl, bolt circle’-’-Four l/.’incll—lO (NC) bolts or capScrews at ¶10 degrees, -

l0’inch bolt circle—Light ~-inch—j1 (NC) bolts or capScrews at 45 degrees,

NOtE lV”—Thesg value, per stack.NOTEV—SIIIt,Chlg for stacking,NO’l’E Vl’-—FClr vertical aPPlieIti~)n14.NOTE VI I—Combination stack conlpolell of three T.R. No,140 and one T,lg, No. 1-it (or horizontal applicati~~is.NOTE VIlI—Conihination stack composed of six T.R, No,

142. two T.R, No. 144 and one TR. No. 151 for ug,ri~htbasemounting,NOTE lX—Contbinatiors stack composed of six T R. No.112, two TR. No. 14-1 and one T.R. No, 152 for un~lerhung~ ~ 11101011 ins.

Nt,)’lE C—An insulator technICal referlnce nItrClt,cr ill .50ilientItication (or an insiltatur unit or & stIck O( iflsutl)-Cr UnIts

with prelcribed mechanical and electrical ch.Iracterls)ics.NOTE Xl— l~j’inch adapter plate for 11CC WIC1I uprightbase mounted stack ‘FR. No. 33 (see Fig. 1, page t&C.

NOTE Nil— ~3~’iiich allaptIr plate for use with under-hung cap mounted stack T.R. No. 35 (see 1ig. 2, page Ii),

B. SwiTch AND Bus INSULATORS—CAP AND PIN TYPES—RADIO FREED—RATEDVALuEs—HIGh STRENGTh

TechnIcalReferenceNumber

VoltageRating,

Ky

t1

iaahoveTechnical Bolt CircleMat Height No. of Reference Diameter

Notes 111am, of Stack, Units per Number of tnche~ 60-CycleInches inches Stac Single Unit (Note 1)

Dry Wet

r Voltage, Ky Withstand ‘I’eat Voltage

Impulse 60-Cycle1.5 x 41) Ms Wsye

Dry WetPos Neg 1 Mm 10 Sec

Impul*e1.5 x 40Ms Wave

411446495356

140

7,5152334.54669...

~.....

...

.,,...IVV

9 8 1 ... 5 60 4010 10 1 . . 5 85 5512 12 1 ,,. 5 110 7514 15 1 .,. 5 145 10017 20 1 ... 5 170 12517 29 2 140 5 280 19017 14j~ I - ... 5 160 95

105 120 35 30125 201) 50 45170 250 70 60225 290 os sO230 - 340 120 100400 5s30 230 160235 290 115 75

95110130200250360210

TechnicalReferenceNumber

VoltageRatIng,

KrNotes

Radio InfluenceVoltage Data

Cantilever Strength,Puncture Leakage Dry hlaxlmum PoundsArcingVoltage, DIstance, Distance? Test Volt- RadIo

Ky per Inches Inches age to InfluenceUnit Ground

5Voltage,

Kr Rms Microvolts Under-at 1000 Kc Upright hung

Torsion Corn-Strength, Tension

Inch Strength, pressi~nPounds Streogth,Pounds Pounds

MaCimumNet ~Veiflht

of Stack,Pounds

414446495356

140

7.5-152334.54669.,,

......,...,.

...

IVV

90 8 53’~ 5 50 4000 3000115 14 73~ 10 50 4000 3000145 18 10~ 15 100 4000 3000195 - 28 133~ 22 100 4000 3000225 40 18 30 200 4000 2500215 60 29 44 200 3000 2.350215 33 143.~ 22 100 7000 4000

12,000 10,000 20,00014,000 10,000 20,00016~0OO 10.000 20C00020,000 14C000 30,00020,000 151000 30,00040,000 20C000 60,00040,000 20,000 60,000

2030406095

ISO90

NOTE i—The folfwing bolt3-inch bolt ciUcle—Fout

screws at 90~,5~inchbolt circle—Foursr,eW’~Itt 00,.

7’-iuch blllt circle—’Pourstiewi at Ot),

l0’L’ch bolt circle—Eightscrewsat 45’,

arrangements are standard:-—13 (NC) bolts or cap

~j’—i1 (NC) bolts or cap

~4’--—’lO(NC) ilillIC or cap

~‘—11 (NC) tIoltS or cap

NOTE lV—The~evaluesper stack,NOTE V—Suitable for stackic;.NOTE V!—Ao insulator techo:cal refeeC_Cc~ CC_C0~~ s

identification for an insulator COliC or a ll,alk ef scsi’ 0

ufliti with prescribed mechanical 4)11 etegtxcri.I cCsC’i-:c~o’C-’

tim,

S

TABLE — 6

C. PosT-TYPESwITcH AND Bus INsuLAToRs—R.~DrOFREED—R.~TEDVALUEs—STAND.\RD STRENGTII

. .

Flashnver Voltage, Kr ~Vithstand Teat Voltage, Kr

TechnIcalReferenceNumber

VoltageRating,

Kr

MaximumDiameter,

inches

heightper

UnIt,Inches

Number Boltof Units Circle

per Diameter,Stack Inches

Nunsherof

Bolts

60-CycleDiameter 60-Cycle 1.5 X 40 Ms Wave —

of Bolts, Dry WetInches Dry Wet Pos Neg I Mm 10 Sec

Impulse1,5 X 41)Ms %Vave

202 7.5 7 7.5 1 3 4 0,5 60 40 105 120 35 30 05205 15 7 10 1 3 4 0.5 85 55 125 200 50 45 110208 23 7 14 1 3 4 0,5 110 75 170 230 70 60 150210 34,5 7,5 ‘ 18 1 3 4 0,5 145 100 223 200 95 SO 20))214 413 8 22 1 3 4 0.5 170 125 230 340 120 100 230216 69 10 30 1 3 4 0.5 235 180 390 375 175 145 350

‘rechnlcalReferenceNumber

VoltageRating,

Kr

TestVoltage

toGround,Ky Rnis

Max RadIoInfluenceVoltage,

Sllcrovoltsat 1000 Kc

CantIleverstrength, Pounds

Upright Underhung

TorsionStrength,Inch-Lbs

TensIonStrength,Pounds

ConipresslonStretsgth,Pounds

LeakageDistance,Inches

Dry

ArcingDistance.

Inches

-~il.is Net~,\eIght,Pounds

per mit

202205208210214216

7.5152334,54669

51015223044

5050

100100200200

200020002000200020001500

200020002000200020001500

6,0007,0008,000

10,00012,00015,000

5,0005,0005,0007,0008,000

12.000

10,00010,00010,00015,00013,00025,01)0

10.515.524374372

137.23

10.514.5IT26

16.3223i)456.5

113

NOTE —An insulator technical reference number is an

identification for an insulator unit or a stack of insulator uOitswith prescribed mechanical and electrical characteristics.

.

\,)1

S

\ ~i~t0N.C.TAP_4~OLE5\ AT 90 DEGREES

OtAMETER- 3 AT 45 DEGREES

FIG IADAPTER FOR TECHNICAL REFERENCE NO. 33

UPRIGHT ~A5E MOUNTED STACK

DIAMETERJ ~ )t NC. TAP-3 HOLES

COUNTERSORE/ AT 45 DEGREESH0L1-’4AT 90 DEGREES

FIG 2

ADAPTER FCR TECHNtCAL REFERENCE NO, 35U)’JOERHUNG CAP MOUNTEDSTAC)~

RECESS IN ADAPtERMUST PA5~sThIS GAGE

ALl. DIMEOSO’iS si u’e’TH0’