Station Post Insulators Catalog

5/25/2018 Station Post Insulators Catalog

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STATION POST INSULATORS

Design Features 2Design Applications Station Post Units - 95 kV BIL thru 750 kV BIL 5 Station Post Stacks - 900 kV BIL thru 2050 kV BIL 6

Flashover and Withstand Values 7RG

Insulators: Semi-Conductive Glaze 8

RGPart Number Conversion Table 9

Single-Piece Station Post Units

95 kV BIL 10

110 kV BIL 11

150 kV BIL 12

200 kV BIL 13250 kV BIL 14

350 kV BIL 15

550 kV BIL 16

650 kV BIL 17

750 kV BIL 18Multiple-Unit Station Post Stacks

900 kV BIL 19

1050 kV BIL 20

1300 kV BIL 21

1470 kV BIL 22

1550 kV BIL 23

1800 kV BIL 24

2050 kV BIL 25Cap and Pin Replacement Insulators 26

Cap and Pin Selection Chart 28Switch Operating Rod Insulators 30Electrostatic Rain Deflectors, Transition Plates, and Spacers 31Part Number Conversion Table - Cavity Core to Solid Core 32Numerical Index Inside Back Cover


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The station post is an original Lappdesign. It was introduced in 1931 toprovide the electric power industry withswitch and bus insulators havingsuperior operating characteristics plusthe strength and long life required forreliable substation operation. Today,after nearly sixty-five years of service onthousands of installations, Lapp stationposts offer station design engineersmaximum economy and trouble-freeservice in a wide variety of voltage andstrength ratings.

All Lapp station post insulators meetANSI leakage requirements. We alsooffer high leakage (H ) and extra-highleakage (E ) versions of these standardcatalog items.

To meet actual requirements of intendedservice as closely as possible, Lapp hasdeveloped station post insulators inmany strength classes. Included inthese are standard, high strength, andextra-high strength station posts.Products are available in ratings from 95kV BIL through 2050 kV BIL foroperating voltages 7.5 kV thru 1100 kV.

Design Features

HardwareAll Lapp station posts have externallyattached caps and/or bases. A provencementing system transfers the loaduniformly from the hardware into theporcelain body.

Porcelain BodyEach insulator body is made from thehighest quality clay raw materials thathave been processed to be fully vitrifiedporcelain. The body is glazed to addstrength, improve surface appearance,and enhance ease of cleaning.

Uniform Leakage PathLapps petticoat profile designs provideoptimum leakage distance. Sheds arespaced to take advantage of the naturalcleaning action of wind and rain and toavoid concentrated hot spots where localstress can cause flashover. Thisprovides the optimum leakage surface.

Short, sturdy shedsThe porcelain sheds protect the bodyfrom impact or flashover. They willwithstand severe mechanical attack.

Even when broken, station post shedsbreak clean, usually leaving the bodyundamaged and the insulator stillserviceable.

Straight-line flashoverLine terminals are separated by the fulllength of the insulator so that flashovergoes outside the unit. Loss of one ormore sheds does not significantly reduceflashover distance.

Standard bolt circlesLapp station post caps and bases have

bolt holes on standard bolt circles forinterchangeability and ease of mounting.The minimum depth of all tapped holeson the end caps is equal to the diameterof the hole. Adapter plates and spacersfor changing mounting hole diametersare available (see page 31).

Lapp station posts manufactured to IECstandards are available. See Catalog11C.


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Minimum deflectionLapp station posts provide maximstiffness in a switch and bus insuldesign, an important feature in tstacks for higher voltages. Station stacks for high voltage and EHV made up of single-piece porcelain externally attached hardware botogether in a strong, rigid assembly.

Same strength invertedAlso available are Lapp station pthat have the same cantilever stremounted upright or inverted. Whetheyre mounted obliquely horizontally, the station posts supeelectrical and mechanical characterisprovide a safe margin of opera

security.

Economical EHV assembliesTapered station post stacks made umixed units of different diameters strength ratings are lighter in weight tuniform-diameter assemblies and oconsiderable economy. Electrical cantilever characteristics are equivato uniform-diameter station posts.

Electrostatic rain deflectorThe wet flashover characteristics oftaller station post stacks are improby placing metal rain deflectors (

Patent No. 2884479) between eacthe sections. The deflectors use electrostatic field surrounding insulator to disperse falling rainwand prevent flooding of the losections.

Total testingSolid core station post insulators given a routine mechanical proof teseither four-way cantilever (upright inverted) or equal bending momdepending on the voltage class. Cacore station posts receive an electtest in accordance with ANSI C2

1983 Section 7.4.1 before assemblhardware. After assembly each cacore unit is tested mechanically to 5of rated tension strength.


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Remarkable service recordLapp station posts have compiled aremarkable service record since theywere introduced nearly sixty-five yearsago. Today, Lapp station posts are in

service on all major systems in theUnited States, Canada and in manyother countries around the world.

These years of operating experience,together with trim good looks, reliablelow-maintenance operation, greaterstiffness, and superior electrical andmechanical characteristics make Lappstation posts ideal insulators formodern switch and bus applications.

Station post reliabilityWhen designers specify Lapp stationpost insulators, they do so with theconfidence that they will receiveproducts that are backed by a long

history of low-maintenance service in awide variety of demanding systemapplications.

Resistance to power arcoverThe sturdy sheds on the porcelaincolumn of the station post insulatorkeep power arcs away from the bodyand protect it from damage. If the arcis sufficiently severe to break awaysheds, it is not unusual to find only thetop or bottom shed damaged with themiddle sheds left intact. Even in theimprobable instance that all sheds arestripped off, the arcover distance of theinsulator will not be decreasedmaterially.

Freedom from radio-TVinterferenceLapp station posts are low capacitanceinsulators by design. This

characteristic enables Lapp stationposts to meet the Radio InfluenceVoltage requirements established in

ANSI C29.9.

Modern appearanceUtility companies have learned thatattractive substations constitute animportant part of good public relations.The use of Lapp station posts willenhance the appearance of substationsat all voltage levels. Their trim,modern design harmonizes well withother apparatus and equipment in thearea.

Mechanical damageJust as the sheds protect the body ofthe insulator from the effects of powerarcover, they also protect it againstmechanical damage from stones andbullets. Generally, stones thrown atthese insulators on structures ofmoderate height will do little or nodamage. A bullet or stone striking ashed with sufficient energy will breakthe shed but leave the insulator bodyintact. Of course, any damagedinsulator should be inspected to verifyintegrity of the insulator.

Mechanical loadingLapp station posts are available invarious ratings to allow switchdesigners to specify insulators to meet

their particular loading requirements.Lapp recognizes that switch insulatorassemblies bear combined mechanicalloads caused by the switchingoperations. These forces may includetension, torsion, compression, andcantilever loading. There may also beimpact loads of significant magnitude.

Under impact loading the intensity ofthe load is the important characteristic.On Lapp station posts, the areas ofload transfer to the porcelain aregenerous, so no high-intensity pointloading occurs.

The inherent strength and rigidity of

Lapp station posts are the result ofcareful design, the limited number ofmechanical joints and their rugged,externally mounted hardware. Thegreat strength and rigidity of Lappstation post insulators make themparticularly well adapted for use on tallhigh voltage and EHV stacks whereswitch and bus alignment andoperation are critical.

Lapp post designs have low naturalfrequency and high dampingcoefficient. These features areimportant considerations when seismiccriteria are a part of the substation

design parameters.

Petticoat ProfilesThe cross-section shown in Figure 1is our conventional shed profile and will be supplied on most standard catalog items. Thecross-section shown in Figure 2, our major/minor shed profile, will be supplied on some standard catalog items and is generallyused on high leakage designs. The cross-section shown in Figure 3, our major/double minor shed profile, will be supplied onsome standard catalog items and is generally used on extra-high leakage designs.

Figure 1 Figure 2 Figure 3


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Design ApplicationsSTANDARD STRENGTH UNITSStandard strength station posts are

recommended for all normal dutyswitch and bus applications. Theseunits have the same cantilever strengthrating mounted upright or underhung.They meet or exceed all ANSIStandards in electrical or mechanicalcharacteristics for their class.

HIGH STRENGTH UNITSHigh strength station post insulatorsprovide an extra margin of mechanicalstrength for heavy-duty switch and busapplications. In addition, they matchthe standard strength station posts inall electrical characteristics. Highstrength station posts are usuallyrequired where mechanical loads fromopening and closing switches areunusually heavy or where there is athreat of severe short circuit stresseson the insulator. Also these unitspermit longer, heavier bus runs withfewer insulators. A neater, morecompact substation design whileretaining the reliability and low-maintenance characteristics of all Lappstation posts insulators.

High strength station posts simplify

economical upgrading of existingstructures for heavier current loads.

EXTRA-HIGH STRENGTH UNITSExtra-High strength station posts areavailable for switches subject to heavymechanical loads. Theyre also usefulfor long or heavily loaded bus runs insubstations where severe short circuitstresses could damage insulators withlower ratings.

Lapp extra-high strength station postshave all of the rugged good looks andelectrical characteristics of the lower

strength station posts insulators.

SpecificationsThe IEEE standard for maximumrecommended working load of Lappstation post insulators is 40% ofpublished cantilever rating, 50% ofpublished torsion rating, and 50% ofpublished tension rating. For shortcircuit loads only, the maximumrecommended working load is 100% ofpublished ratings when using formulasfrom ANSI C37-1972.

Gray glaze is standard on all sta

post insulators. Chocolate glazeavailable by deleting -70 from catalog number.

Caps and flanges are made of dforged steel, malleable iron or duiron, and hot-dip galvanized. Tapholes are Unified National CoaThread Series, 1/2-13, 5/8-11 and 10. Holes are tapped .015 oversizallow for the use of galvanized screws.

Leakage distance shown dimensional data conforms to Aminimum requirements. To desig

increased leakage of up to 40% mthan ANSI standards (High Leakaan H suffix is added to the catnumber; example 315286H-70. designate increased leakage grethan 40% more than ANSI standa(Extra-High Leakage), an E suffadded to the catalog number, exam315286E-70.

Station posts manufactured to standards are available. See LCatalog 11C. For more informacontact Lapp Insulator or your lLapp representative.


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Design ApplicationsSTATION POST STACKS FOR HIGH VOLTAGE, EHV

AND UHVLapp station post insulators are well-suited to highvoltage and EHV switch and bus constructionbecause of their strength, rigidity and adaptability to awide range of stack heights and BIL ratings.

Match industry BIL ratingsSince industry practices vary widely in the choice ofinsulator levels in the design of EHV substations,Lapp station posts for the higher voltages areidentified by Basic Impulse Insulation Level (BIL),rather than by voltage class.

The most popular BIL designations based on the kVcrest value to withstand voltage of a 1.2 x 50microsecond full wave impulse voltage are listed

here. Lapp EHV station post insulators are availablefor all of these BIL ratings.

Industry Approved Basic ImpulseInsulation Levels (BIL), kV

900 1300 1550 20501050 1470 1800 2300

Freedom from radio-TV interferenceLapp EHV station posts are low capacitanceinsulators and they are inherently free from radio andtelevision interference. By design the hardware isseparated by the full height of the porcelain, thusraising the voltage at which corona starts. EveryLapp station post meets Radio Influence Voltages

established in ANSI C29.9. This is particularlyimportant on tall stacking insulators for operation atEHV and UHV voltage levels.

Corona shields are available for EHV station postswhere service conditions make extra shieldingnecessary.

Electrostatic rain deflectorsAny type of tall insulator is susceptible to bridging aswater flows down and accumulates on the lowersections. The Lapp Electrostatic Rain Deflector(Patent No. 2884479) uses the electrostatic fieldsurrounding the insulator to disperse the falling waterand eliminate bridging. In addition, these deflectorscomplement the Lapp leakage surface design of the

insulator.Electrostatic Rain Deflectors are supplied on allstation posts rated 1300 kV BIL and above. They canbe ordered for lower voltage units if desired (see page31).

Minimum deflection under cantilever loadingLapp station posts provide maximum stiffness, afeature of increasing importance as seismic criteriabecome a part of substation design.

Economy of tapered stacksAlthough both uniform-diameter and taperedstation posts are available for all EHV and UHVapplications, it is usually more economical to usetapered stacks for BIL ratings above 1470 kV.

Tapered station post stacks are made up ofmixed sections of different diameters andstrength ratings. They are electrically equivalentto and provide the same bending strengths asuniform-diameter station posts but are lighter inweight and less expensive. Tension, torsion, andcompression values are set by the smallestdiameter section and will be less than the valuesof uniform-diameter stacks.

For example, a typical 3-unit, 1800 kV BIL

tapered stack consists of one 10.62 diameterlower section, one 9.62 diameter center sectionand one 9.25 diameter top unit. This assemblyis comparable in electrical characteristics to auniform-diameter stack composed of three10.62 sections. BIL rating and height are thesame for both insulators, but the tapered stationposts is lighter in weight. The result is lowerinsulator costs, plus savings in handling anderecting costs.

SpecificationsThe IEEE standard for maximum recommendedworking load for Lapp station post insulators is40% of published cantilever rating, 50% of

published torsion rating, and 50% of publishedtension rating. For short circuit loads only, themaximum recommended working load is 100% ofpublished ratings when using formulas from ANSIC37-1972.

Gray glaze is standard on all station postinsulators. Chocolate glaze is available bydeleting -70 from the catalog number.

Caps and flanges are made of drop forged steel,malleable iron or ductile iron, and hot-dipgalvanized. Tapped holes are Unified NationalCoarse Thread Series, 1/2-13, 5/8 -11, and3/4 -10. Holes are tapped .015 oversize toallow for the use of galvanized cap screws.

Leakage distance shown in dimensional dataconforms to ANSI minimum requirements. Todesignate increased leakage of up to 40% morethan ANSI standards (High Leakage), an Hsuffix is added to the catalog number; example315308H-70. To designate increased leakagegreater than 40% more than ANSI standards(Extra-High Leakage), an E suffix is added tothe catalog number, example 315308E-70.

Station posts manufactured to IEC standards areavailable, see Lapp Catalog 11C. For moreinformation contact Lapp Insulator or your localLapp representative.


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American National Standards no longer require testing for thefollowing electrical values. This table is intended as a reference for

those who wish to use its data.

Summary of Switching Surge Withstands and Switching Surge Critical Flashoversof 900 kV BIL to 3300 kV BIL Lapp Station Post Insulators

The flashover withstand values are the average of many tests on the same or an equivalent testspecimen. Because they are averages of test values read directly from a test curve with none ofthe safety factors commonly associated with catalog values having been applied, they should notbe considered as ratings.

AVERAGE FLASHOVER VALUES WITHSTAND VALUESCritical Power

Power Frequency Impulse Frequency

BIL Dry, kV Wet, kV Negative, kV Dry, kV

95 60 40 120 35

110 85 55 200 50

150 110 75 250 70

200 145 100 290 95

250 170 125 340 120

350 235 180 475 175

550 385 285 780 280650 435 335 900 335

750 485 380 1020 385

900 575 475 1240 465

1050 660 570 1450 545

1300 745 660 1650 610

1470 830 740 1850 680

1550 865 780 1950 710

1800 990 900 2240 810

2050 1100 990 2600 940

Reference: ANSI C29.9 - 1983, Appendix B.

Insulator DRY WET

BIL Height Positive, kV Negative, kV Positive, kV Negative, kVinches WS CFO WS CFO WS CFO WS C

900 80 745 825 985 1210 690 770 830 9

1050 92 855 955 1115 1380 805 900 945 11300 106 980 1105 1260 1565 935 1045 1025 1

1550 128 1145 1285 1445 1825 1105 1275 1210 1

1800 152 1280 1460 1590 2050 1255 1450 1340 1

2050 182 1410 1600 1720 2250 1390 1595 1435 1

2425 210 1620 1845 1950 2460 1630 1770 1590 1

2675 240 1750 2010 2120 2620 1790 1920 1710 1

3050 270 1870 2140 *2280 *2760 1920 2060 1825 2

3300 300 1950 2240 *2420 *2900 2000 2200 1930 2

* Extrapolated values Wave shape: 200 x 4000 micTested with Base 24' above ground using 4" IPS Bus.


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RG Insulators Employ a UniqueSemi-Conductive Glaze WhichInhibits Arcing and Flashover.Since they were first installed in the

1970s, Lapp RG insulators have builtan enviable operating record incontaminated areas where no standardinsulator can perform. Thats becauseRG insulators make use of a uniquesemi-conducting glaze which effectivelyinhibits arcing and flashover.

Whether the contamination problem isthe result of coastal salt fog or mist,industrial pollution, agricultural dust orchemicals, the tens of thousands ofRG insulators already in service haveprovided excellent performance forutilities around the world.

RG Insulators Can SignificantlyReduce Construction andOperating CostsThey Reduce the Need to Over-InsulateOver-insulation may reduce thenumber of flashovers in contaminatedareas, but its effectiveness is nevercertain. In addition, larger insulatorsmay require larger structures, whichcan lead to higher costs.

When you choose RG insulators, youdont need to over-insulate. In fact,RG insulators hold voltage in

environments that caused flashover onregular insulators having two to threetimes the leakage distance.

Thats what we call performance.

They Reduce the Need forWashingWashing can cost utilities hundreds of

thousands of dollars a year; a costwhich RG insulators eliminate.

They Reduce EMI ProblemsAssociated With InsulatorsThe outstanding performance of RGinsulators reduces both radio noise and

TV interference. In fact, at operatingvoltage, RIV on RG insulators remainsat near zero under most conditions ofsurface contamination.

They Reduce the Need forGreasing or CoatingPeriodically applying silicone grease orRTV coating to insulators incontaminated areas is another costlymaintenance procedure which RGinsulators eliminate.

The Glaze on RG Insulators is aPermanent, Integral Part of theInsulatorUnlike protective coatings which are

applied after an insulator is glazed, thesemi-conductive glaze on RGinsulators is a permanent, integral partof the insulator.

Because the glaze is applied as part ofthe normal manufacturing process, RGinsulators are less costly thaninsulators which are first glazed with aregular glaze and then covered with ahydrophobic coating.

900 kV BIL Resistance Graded Station Posts at Hamilton Beach T.S.


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RG Insulators Gain TheirSuperior Performance FromThree Factors:

1. Linear Voltage DistributionVoltage drop across the entire lengthof the RG insulator surface is uniformso that all parts of the insulator areevenly stressed.

2. Heating EffectThe small current flow over theelectrically equivalent resistor createdon the surface of an RG insulatorwarms the surface to a few degreesabove the ambient temperature. Thisdiscourages moisture accumulation,and moisture is usually necessary tomake contaminants conductive.

3. Reduction of Dry BandArcingDry bands form on RG insulators withuneven wetting and drying, just asthey do on regular insulators.However, RG insulators provide aconductive shunt path across the drybands, preventing any visiblescintillations or arcing. The result?There are no local arcs that can growinto full length flashover.

Theyre Backed By Years ofField ExperienceCommercially available since 1970,RG insulators have been used in abroad range of applications, frommoderate to extremely severecontamination. This experience putsLapp in a position which no othermanufacturer can match when itcomes to helping you meet thecontamination demands of yourapplication.

It has also shown us ways in which toimprove our product designs. AllLapps latest RG insulatorsdemonstrate our commitment to

providing the most comprehensiveand up-to-date product designsavailable.

Want to Know More?We reccommend consulting Lappdirectly when considering theinstallation of Resistance Graded

Station Posts (RG). For more details

and technical assistance, write toLapp or contact your Lapprepresentative.

RGRG

Resistance Graded Station PostsResistance Graded Station Postsand Equivalent Regular Glaze Station Postsand Equivalent Regular Glaze Station Posts

Regular RG Glaze Equivalent Regular RG Glaze EquBIL Glaze Previous Current BIL Glaze Previous C95 315202-70 500001 535202 900 315126-70 53

315041-70 535041 317126-70 500176 53315222-70 500011 535222 319126-70 53318490-70 500021 500021 315175-70 500095 53

110 315205-70 500002 535205 317175-70 53317004-70 537004 319175-70 53315044-70 535044 315304-70 500030 53317044-70 537044 315304-70 500079 53315225-70 500012 535225 315308-70 500031 53318451-70 500022 500195 315308-70 500033 53

150 315007-70 535007 315308-70 500076 53317007-70 537007 314925-70 500034 50317010-70 537010 314161-70 500032 50315046-70 535046 1050 315128-70 53

317046-70 537046 317128-70 53315208-70 500003 535208 319128-70 53315227-70 500013 535227 315176-70 53318453-70 500023 500196 317176-70 53

200 315010-70 535010 319176-70 53315049-70 535049 315312-70 500040 53315210-70 500004 535210 315312-70 500080 53315231-70 500014 535231 315316-70 500041 53318455-70 500024 500197 315362-70 500042 53

210 319140-70 539140 315362-70 500045 53319139-70 539139 1300 315324-70 500051 53

250 315013-70 535013 315324-70 500086 53317013-70 537013 315367-70 500054 53315053-70 535053 315367-70 500088 53317053-70 537053 315368-70 500052 53315214-70 500005 535214 315368-70 500087 53315267-70 500015 535267 315369-70 500055 53

318459-70 500082 500198 315369-70 500089 53350 315016-70 535016 1470 315330-70 500061 53

317016-70 537016 315330-70 500063 53315056-70 535056 315371-70 500091 53317056-70 537056 315373-70 500065 53319056-70 539056 315372-70 500062 53314970-70 500199 1550 314732-70 500073 50314982-70 500200 315379-70 500074 53315216-70 500006 535216 318059-70 500092 50315278-70 500016 535278 1800 315391-70 500083 53318461-70 500081 500201 315391-70 500118 53

550 315019-70 535019 314914-70 500084 50317019-70 537019 314914-70 500119 50319019-70 539019 314934-70 500085 50315173-70 535173 314934-70 500120 50317173-70 537173 2050 314867-70 500093 50319173-70 539173 314867-70 500122 50

315286-70 500007 535286 318032-70 500094 50315287-70 500017 535287 318032-70 500123 50318457-70 500027 500027

650 315288-70 500008 535288315289-70 500018 535289314857-70 500028 500202

750 315025-70 535025317025-70 537025319025-70 539025315174-70 535174317174-70 537174319174-70 539174

315291PA-70 500009 500009PA315295PA-70 500019 500019PA318441PA-70 500029 500029PA


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* For Maximum recommended working loads see Specif ications, page 5.Note: For RG glazed insulators equivalent to these standard insulators, see table on page 9.Illustrations shown are true representations of Lapp products at the time of printing, but are subject to change at any time.

10 ALL DIMENSIONS ARE IN IN

7.0 7.0

7.507.50

4 TAPPED HOLES4 TAPPED HOLES1/2-13 +.0 15 OVERSIZE1/2-13 +.0 15 OVERSIZE

5/85/8"FULL THREADFULL THREADON 3.0ON 3.0 "BOLT CIRCLEBOLT CIRCLE

4.25 4.25

4.25 4.25

STANDARD STRENGTH UNIT

7.50 7.50

6 .12 6 .12

6 .12 6 .12

10 .010 .0

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.0 15 OVERSIZE5/ 8-11+.0 15 OVERSIZE

3/43/ 4"FULL THREADFULL THREADON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE

HIGH STRENGTH UNIT

6 .12 6 .12

10 .0 10 .0

6 .12 6 .12

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.0 15 OVERSIZE5/ 8- 11+.0 15 OVERSIZE

11/1611/16 "FULL THREADFULL THREADON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE

EXTRA-HIGH STRENGTH UN

CHARACTERISTICSLapp Catalog Number 315202-70 315222-70 318490-70Ansi Technical Reference Number T.R.202 T.R.222Dimensions

Leakage Distance, Inches 10.5 10.5 10.5Mechanical Values *

Cantilever Strength, Upright, Pounds 2000 4000 8000Cantilever Strength, Underhung, Pounds 2000 4000 8000

Tensile Strength, Pounds 7000 15000 28000

Torsion Strength, Inch-Pounds 6000 12000 40000

Compression Strength, Pounds 10000 20000 40000Electrical Values

Voltage Class, kV 7.5 7.5 7.5

Impulse Flashover, Positive, kV 105 105 105

Low Frequency Withstand, 10 Sec. Wet, kV 30 30 30

Impulse Withstand, kV 95 95 95Radio Influence Voltage Data

Test Voltage, Rms to Ground, kV 5 5 5

Maximum RIV, Microvolts at 1000 kHz 50 50 50Weight

Net Weight, Each, Pounds 14 32 46

315202-70315202-70 315222-70315222-70 318490-70318490-70


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* For Maximum recommended working loads see Specifications, page 5.Note: For RG glazed insulators equivalent to these standard insulators, see table on page 9.Illustrations shown are true representations of Lapp products at the time of printing, but are subject to change at any time. ALL DIMENSIONS ARE IN INCHE

7.0 7.0

4.25 4.25

10 .010 .0

4 TAPPED HOLES4 TAPPED HOLES1/2-13 +.0 15 OVERS IZE1/2-13 +.0 15 OVERS IZE

5/ 85/ 8"FULL THREADFULL THREADON 3.0ON 3.0 "BOLT CIRCLEBOLT CIRCLE


4.25 4.25

8.50 8.50

6 .25 6 .25

6 .25 6 .25

12.012.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.0 15 OVERS IZE5/ 8-11+.0 15 OVERS IZE


HIGH STRENGTH UNIT

10 .0 10 .0

6 .12 6 .12

6 .12 6 .12





Leakage Distance, Inches 15.5 15.5 17Mechanical Values *





Voltage Class, kV 15 15 15







315205-70315205-70 318451-70318451-70315225-70315225-70


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4.25 4.25

4.25 4.25

14.014.0

7.0 7.0




9.0 9 .0

6 .25 6 .25

15.015.0

6 .25 6 .25



HIGH STRENGTH UNIT

11.38 11.38

6 .25 6 .25

6 .25 6 .25





Leakage Distance, Inches 24 24 24Mechanical Values *












315208-70315208-70 315227-70315227-70 318453-70318453-70


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4.25 4.25

4.25 4.25

7.50 7.50

18.018.0




20 .020 .0

9.0 9 .0

6 .25 6 .25

6 .25 6 .25



HIGH STRENGTH UNIT

11.50 11.50

6 .25 6 .25

6 .25 6 .25


3/ 43/ 4"FULL THREADFULL THREADON 5.0ON 5.0

"BOLT CIRCLEBOLT CIRCLE








Voltage Class, kV 34.5 34.5 34.5







315210-70315210-70 315231-70315231-70 318455-70318455-70


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22.022.0

4.25 4.25

4.25 4.25

7.84 7.84




6 .25 6 .25

10 .0 10 .0

6 .25 6 .25

24.024.0



HIGH STRENGTH UNIT

22

10 .81 10 .81

8.38 8.38

8.38 8.38

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERS IZE3/ 4-10 +.0 15 OV ERS IZE
















315214-70315214-70 315267-70315267-70 318459-70318459-70


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4.25 4.25

4.25 4.25

30 .030 .0

7.84 7.84




6 .12 6 .12

6 .12 6 .12

30 .0 30 .0

10 .50 10 .50



HIGH STRENGTH UNIT

12.88 12.88

8.38 8.38

8.38 8.38

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERS IZE3/ 4-10 +.0 15 OV ERS IZE
















315216-70315216-70 315278-70315278-70 318461-70318461-70


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6 .12 6 .12

9 .31 9 .31

6 .12 6 .12

45.045.0




6 .25 6 .25

6 .25 6 .25

10 .50 10 .50

45.045.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.0 15 OVERS IZE5/ 8- 11+.015 OVERS IZE


HIGH STRENGTH UNIT

10 .50 10 .50

8.38 8.38

8.38 8.38

4848

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.0 15 OV ERS IZE3/ 4-10 +.0 15 OV ERS IZE





Cantilever Strength, Upright, Pounds 1700 2600 4500Cantilever Strength, Underhung, Pounds 1700 2600 4500Tensile Strength, Pounds 20000 25000 40000Torsion Strength, Inch-Pounds 40000 90000 120000Compression Strength, Pounds 60000 75000 120000

Electrical Values








315286-70315286-70 315287-70315287-70 318457-70318457-70


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6 .12 6 .12

6 .12 6 .12

9.69 9.69

54.054.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.0 15 OVERSIZE5/ 8-11+.0 15 OV ERSIZE



6 .25 6 .25

6 .25 6 .25

10 .50 10 .50

54.054.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.0 15 OVERSIZE5/ 8- 11+.015 OV ERSIZE


HIGH STRENGTH UNIT

8.38 8.38

10 .50 10 .50

8.38 8.38

5454

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OVERS IZE3/ 4-10 +.015 OVERS IZE
















315288-70315288-70 315289-70315289-70 314857-70314857-70


19/34



6 .25 6 .25

6 .25 6 .25

11.6 2 11.6 2

62.062.0

4 TAPPED HOLES4 TAPPED HOLES5/8-11+.0 15 OVERS IZE5/ 8- 11+.015 OVERSIZE



6.25 6 .25

6.25 6 .25

11.6 2 11.6 2

62.062.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.015 OVERSIZE5/ 8-11+.0 15 OVERS IZE


HIGH STRENGTH UNIT

8.38 8.38

8.38 8.38

10 .62 10 .62

62.62.

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERSIZE3/ 4-10 +.015 OV ERS IZE



CHARACTERISTICSLapp Catalog Number 315291PA-70 315295PA-70 318441PA-70Ansi Technical Reference Number T.R.291 T.R.295Dimensions













315291-PA-70315291-PA-70 315295-PA-70315295-PA-70 318441-PA-70318441-PA-70


20/34


9 .50 9.50TY PTY P

6 .12 6 .12

6 .12 6 .12

40 .040 .0

40 .040 .0

80 .080 .0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.0 15 OVERSIZE5/ 8- 11+.0 15 OVERSIZE


STANDARD STRENGTH UNIT HIGH STRENGTH UNIT

10 .12 10 .12TY PTY P

6.25 6 .25

6.25 6 .25

40 .040 .0

40 .040 .0

80 .080 .0

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.0 15 OVERSIZE5/ 8-11+.0 15 OVERSIZE


10 .50 10 .50

9.75 9.75

8.38 8.38

6 .25 6 .25

40 .040 .0

40 .040 .0

80 .080 .0

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.0 15 OVERS IZE3/ 4-10 +.0 15 OVERS IZE


4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.015 OV ERS IZE5/ 8- 11+.0 15 OV ERS IZE

3/43/ 4"FULL THREADFULL THREADON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE

10 .75 10 .75TY PTY P

8 .38 8.38

8 .38 8.38

44

44

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.0 15 OVERS3/ 4-10 +.015 OVERS

7/87/8 "FULL THREADFULL THREADON 7.0ON 7.0 "BOLT CIRCBOLT CIRC

CHARACTERISTICSLapp Catalog Number 315304-70 315308-70 314925-70 314161-Ansi Technical Reference Number T.R.304 T.R.308Dimensions

Leakage Distance, Inches 165 165 165 164Mechanical Values *

Cantilever Strength, Pounds 950 1450 2450 2750

Tensile Strength, Pounds 20000 25000 20000 40000

Torsion Strength, Inch-Pounds 40000 90000 60000 120000

Compression Strength, Pounds 60000 75000 60000 100000Electrical Values

Impulse Flashover, Positive, kV 1010 1010 1010 1010

Low Frequency Withstand, 10 Sec. Wet, kV 385 385 385 385

Impulse Withstand, kV 900 900 900 900Radio Influence Voltage Data

Test Voltage, Rms to Ground, kV 146 146 146 146

Maximum RIV, Microvolts at 1000 kHz 500 500 500 500Weight

Net Weight, Each, Pounds 307 371 417 490

EXTRA-HIGH STRENGTH UNITS

315304-70315304-70 315308-70315308-70 314925-70314925-70 314161-70314161-70


21/34



6 .12 6 .12

9.84 9.84

46.046.0

46.046.0

6 .12 6 .12

92.092.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.015 OVERS IZE5/8- 11+.015 OVERS IZE



10 .50 10 .50

46.046.0

46.046.0

6.25 6.25

6.25 6.25

92.092.0

4 TAPPED HOLES4 TAPPED HOLES5/8- 11+.015 OVERSIZE5/8-11+.0 15 OVERS IZE


HIGH STRENGTH UNIT

46.046.0

46.046.0

10 .84 10 .84

8.38 8.38

8.38 8.38

92.92.

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERS IZE3/ 4-10 +.015 OV ERS IZE



CHARACTERISTICS

Lapp Catalog Number 315312-70 315316-70 315362-70Ansi Technical Reference Number T.R.312 T.R.316 T.R.362Dimensions

Leakage Distance, Inches 198 198 198Mechanical Values *Cantilever Strength, Pounds 800 1250 2300










315312-70315312-70 315316-70315316-70 315362-70315362-70


22/34


53.053.0

53.053.0

6 .12 6 .12

8.94 8.94TY PTY P

6 .12 6 .12

10 6 .010 6 .0

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.015 OVERS IZE5/8- 11+.015 OVERSIZE



53.053.0

53.053.0

8.50 8.50

6 .12 6 .12

9.44 9.44

9.56 9.56

10 6.010 6.0

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OVERS IZE3/ 4-10 +.015 OV ERS IZE


HIGH STRENGTH UNIT4 TAPPED HOLES4 TAPPED HOLES

5/8-11+.015 OV ERS IZE5/ 8-11+.015 OVERS IZE11/1611/16 "FULL THREADFULL THREAD

ON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE

53.053.0

53.053.0

8.38 8.38

10 .19 10 .19TY PTY P

8.38 8.38

10 6 .010 6 .0

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OV ERS IZE3/4-10 +.015 OV ERS IZE


53.53.

53.53.

6 .12 6 .12

9.0 6 9.0 6

10 .31 10 .31

8.38 8.384 TAPPED HOLES4 TAPPED HOLES

3/ 4-10 +.015 OV ERS I3/ 4-10 +.015 OV ERS I7/87/8 "FULL THREADFULL THREAD

ON 7.0ON 7.0 "BOLT CIRCLBOLT CIRCL

4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.0 15 OV ERSIZ5/ 8- 11+.0 15 OV ERSIZ

11/1611/16 "FULL THREADFULL THREADON 5.0ON 5.0 "BOLT CIRCLBOLT CIRCL

CHARACTERISTICSLapp Catalog Number 315324-70 315367-70 315368-70 315369-Ansi Technical Reference Number T.R.324 T.R.367 T.R.368 T.R.369Dimensions

Leakage Distance, Inches 231 231 231 231Mechanical Values *

Cantilever Strength, Pounds 1000 1450 2000 2050











315324-70315324-70 315367-70315367-70 315368-70315368-70 315369-70315369-70


23/34



6 .12 6 .12

6 .12 6 .12

9.38 9.38TY PTY P

41.041.0

40 .040 .0

41.041.0

122.0122.0

4 TAPPED HOLES4 TAPPED HOLES5/ 8-11+.015 OVERS IZE5/ 8- 11+.015 OVERS IZE



6 .25 6 .25

8.56 8.56

8.81 8.81

10 .06 10 .06

8.50 8.50

41.041.0

40 .040 .0

41.041.0

122.0122.0

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERS IZE3/4-10 +.015 OVERS IZE


HIGH STRENGTH UNIT

4 TAPPED HOLES4 TAPPED HOLES5/8- 11+.015 OVERSIZE5/8-11+.015 OV ERS IZE


6 .12 6 .12

9 .31 9.31

9.44 9 .44

10 .19 10 .19

8.38 8.38

41.041.0

40 .040 .0

41.041.0

122.0122.0

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OV ERS IZE3/ 4-10 +.015 OV ERS IZE


4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.0 15 OV ERSIZE5/ 8-11+.015 OV ERS IZE


41.41.

8.38 8.38

10 .50 10 .50TY PTY P

8.38 8.38

4040

41.41.

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERSIZ3/4-10 +.015 OV ERS IZ

7/87/8"FULL THREADFULL THREADON 7.0ON 7.0 "BOLT CIRCLBOLT CIRCL

CHARACTERISTICS

Lapp Catalog Number 315330-70 315371-70 315373-70 315372-70Ansi Technical Reference Number T.R.330 T.R.371 T.R.373 T.R.372Dimensions

Leakage Distance, Inches 264 264 264 264Mechanical Values *Cantilever Strength, Pounds 900 1170 1750 1750











315330-70315330-70 315371-70315371-70 315373-70315373-70 315372-70315372-70


24/34


6 .25 6.25

10 .12 10 .12

10 .25 10 .25

11.0 6 11.0 6

8.38 8.38

43.043.0

42.042.0

43.043.0

128 .0128 .0


4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OV ERS IZE3/ 4-10 +.015 OV ERS IZE


4 TAPPED HOLES4 TAPPED HOLES5/ 8- 11+.015 OVERS IZE5/8- 11+.015 OVERS IZE


6 .25 6 .25

10 .12 10 .12

11.25 11.25

11.56 11.56

8.38 8.38

43.043.0

42.042.0

43.043.0

128 .0128 .0

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OVERS IZE3/4-10 +.015 OV ERS IZE



5/8- 11+.015 OVERSIZE5/8-11+.0 15 OVERS IZE7/87/8"FULL THREADFULL THREAD

ON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE 6.25 6 .25

10 .50 10 .50

11.0 11.0

11.50 11.50

15.50 15.50

43.043.0

.88.88

42.042.0

43.043.0

128128

4 HOLES .81ON4 HOLES .81ON14.0 " BOLT CIRCLE14.0 " BOLT CIRCLE

EXTRA-HIGH STRENGTH UN4 TAPPED HOLES4 TAPPED HOLES

5/8-11+.015 OVERS IZE5/ 8- 11+.015 OVERS IZE7/87/8"FULL THREADFULL THREAD

ON 5.0ON 5.0 "BOLT CIRCLEBOLT CIRCLE

CHARACTERISTICSLapp Catalog Number 314732-70 315379-70 318059-70Ansi Technical Reference Number T.R.379Dimensions


Cantilever Strength, Pounds 1000 1700 2500










314732-70314732-70 315379-70315379-70 318059-70318059-70


25/34



8.38 8.38

6 .12 6 .12

9.62 9.62

9 .75 9.75

10 .62 10 .62

51.051.0

50 .050 .0

51.051.0

152.0152.0

4 TAPPED HOLES4 TAPPED HOLES3/ 4-10 +.015 OVERS IZE3/4-10 +.015 OVERS IZE

.88 FULL THREAD.88 FULL THREADON 7.0" BOLT C IRCLEON 7.0" BOLT C IRCLE

STANDARD STRENGTH UNIT4 TAPPED HOLES4 TAPPED HOLES

5/8-11+.015 OV ERS IZE5/8-11+.015 OV ERS IZE11/16" FULL THREAD11/16" FULL THREAD

ON 5.0 " BOLT CIRCLEON 5.0 " BOLT CIRCLE

.88.88

6 .25 6 .25

9.88 9.88

11.0 11.0

11.12 11.12

15.50 15.50

51.051.0

51.051.0

50 .050 .0

152.0152.0

4 HOLES .81ON4 HOLES .81ON14.0 " BOLT C IRCLE14.0 " BOLT CIRCLE


5/ 8-11+.015 OV ERS IZE5/8-11+.015 OV ERS IZE3/4" FULL THREAD3/4" FULL THREAD

ON 5.0 " BOLT CIRCLEON 5.0 " BOLT CIRCLE

.88.88

6.25 6 .25

11.0 11.0

11.25 11.25

12.0 6 12.0 6

15.50 15.50

51.051.0

50 .050 .0

51.051.0

152152.

4 HOLES .88 ON4 HOLES .88 ON14.0 " BOLT CIRCLE14.0 " BOLT CIRCLE

EXTRA-HIGH STRENGTH UN4 TAPPED HOLES4 TAPPED HOLES

5/8- 11+.015 OV ERS IZE5/8-11+.015 OV ERS IZE3/4" FULL THREAD3/4" FULL THREAD

ON 5.0 " BOLT C IRCLEON 5.0 " BOLT CIRCLE

CHARACTERISTICSLapp Catalog Number 315391-70 314914-70 314934-70Ansi Technical Reference Number T.R.391Dimensions


Cantilever Strength, Pounds 1400 1750 2500










315391-70315391-70 314914-70314914-70 314934-70314934-70


26/34


9.12 9.12

9.38 9.38

10 .0 10 .0

10 .62 10 .62

8.38 8.38

46.046.0

45.045.0

45.045.0

46.046.0

6 .12 6 .12

182.0182.0

4 TAPPED HOLES4 TAPPED HOLES3/4-10 +.015 OVERS IZE3/ 4-10 +.015 OV ERS IZE

7/8" FULL THREAD7/8" FULL THREADON 7.0" BOLT C IRCLEON 7.0" BOLT C IRCLE


4 TAPPED HOLES4 TAPPED HOLES5/8-11+.0 15 OVERS IZE5/ 8-11+.015 OVERS IZE

11/16" FULL THREAD11/16" FULL THREAD

ON 5.0 " BOLT C IRCLEON 5.0 " BOLT C IRCLE

.62.62

6 .25 6.25

10 .75 10 .75

11.12 11.12

11.88 11.88

12.0 12.0

15.50 15.50

46.046.0

46.046.0

46.046.0

47.047.0

11

4 HOLES .88 ON4 HOLES .88 ON14.0 " BOLT CIRCLE14.0 " BOLT CIRCLE

HIGH STRENGTH UNIT

4 TAPPED HOLES4 TAPPED HOLES5/8- 11+.015 OVERSIZE5/8-11+.015 OVERS IZE

3/4" FULL THREAD3/4" FULL THREAD

ON 5.0 " BOLT CIRCLEON 5.0 " BOLT C IRCLE

CHARACTERISTICSLapp Catalog Number

314867-70 318032-70Ansi Technical Reference NumberDimensions

Leakage Distance, Inches 432 432Mechanical Values *

Cantilever Strength, Pounds 1200 2000

Tensile Strength, Pounds 20000 20000

Torsion Strength, Inch-Pounds 60000 60000

Compression Strength, Pounds 60000 60000Electrical Values

Impulse Flashover, Positive, kV 2370 2250

Low Frequency Withstand, 10 Sec. Wet, kV 830 830

Impulse Withstand, kV 2050 2050Weight

Net Weight, Each, Pounds 858 1223

314867-70314867-70 318032-70318032-70


27/3426

Lapp has been meeting the needs ofelectric utilities for over 80 years. Thestation post was a Lapp first, back in1931. Today, Lapp continues to be at

the forefront of insulator design withworld class research facilities andengineering capabilities. The LappCap and Pin Replacement Post offerselectric utilities a direct replacement forcap and pin insulators, featuring all thecharacteristics required for reliablesubstation operation.

Design AdvantagesBoth cap and pin and station postinsulators have been used for manyyears in substations. While the twoproducts serve the same task, their

designs are markedly different. Longterm experience with both designs hasshown that there are generic designdeficiencies of the cap and pin that canalmost certainly lead to insulator failurein service. Large numbers of cap andpin failures have lead several North

American utilities to undertakereplacement programs in which stationposts are taking the place of cap andpin insulators. When comparing thetwo designs, the station postsadvantages become evident and itsviability as a replacement for the cap

and pin becomes clear.

Porcelain has very high compressivestrength (80,000 psi), sixteen timesgreater than its tensile strength (5,000psi). Station Post insulators are

designed to take advantage of thisinherent quality by avoiding conditionswhich place porcelain in tension. Capand pin insulators, on the other hand,can be subject to tensile forcesgenerated between two or moreporcelain shells from two possiblesources: growth within the cement

joint, and thermal expansiondifferences.

Growth within the cement joint canbe a result of reactions between thecement and foreign chemicalsubstances, such as industrial

contaminants which may be in theservice environment of the insulator.

As these reactions proceed, the jointswells or grows. In designs such asthe cap and pin, which employ up tothree seperate internal joints, thisswelling generates bursting (tensile)forces on the porcelain shells,ultimately leading to cracking. If thecement is of poor quality and containsexcessive amounts of impurities suchas free calcium oxide or magnesiumoxide, reactions can occur within thecement itself which may lead to thistype of mechanical failure. The stationpost design uses only external cement

joints. Under conditions of growth,external joints preclude thedevelopment of tensile stresses on theporcelain. Stresses are compressive innature, and thus load the porcelain inits strongest state.

CAP AND PIN INSULATORCAP AND PIN INSULATOR

CEMENTCEMENTJ OINTJ OINT








STATION POSTSTATION POST PEDESTAL POSTPEDESTAL POST STACKING POSTSTACKING POST


28/34

The station post design, tested bymore than 60 years of service, is muchsimpler than that of a correspondingcap and pin unit. Each station post

section employs a large, single piece ofporcelain in contrast to the cap and pinthat is composed of one to threeindividual porcelain shells nestedtogether and joined by cement. Thesimpler design and the use of fewercemented joints means that stationposts are more rigid and exhibit lessdeflection under load than do cap andpin insulators, an important feature inswitch applications.

SpecificationsThe maximum working load for Lappstation post insulators is 40% of

published cantilever rating, 50% ofpublished torsion rating, and 50% ofpublished tension rating. For shortcircuit loads only, the maximumrecommended working load is 100% ofpublished ratings when using formulasfrom ANSI C37-1972.

Light Gray glaze is standard on allinsulators. Chocolate glaze isavailable by deleting -70 from thecatalog number.

Caps and flanges are made of dforged steel, malleable iron or du

iron, and hot dip galvanized. Tapholes are Unified National CoaThread Series, 1/2 -13 and 5/8Holes are tapped .015 oversizeallow for the use of galvanized screws.

RG Resistance Graded cap andreplacement insulators, employingunique semi-conductive glaze effectively inhibits arcing and flashoare also available. For more deand technical assistance, contact ylocal Lapp representative.

115 kV Cap and Pin Replacements photo courtesy of Bonneville Power Administration


29/34

8Units supplied with cap screw packages consisting of hex head cap screws, finished hex nuts and lock washers (galvanized steel) for sectionassembly.

Note: For RG glazed insulators equivalent to these standard insulators, see table on page 9.

28

HH

HH

HH

PDPD

PDPD

MTGMTG

BCBC

MTGMTG

BCBC

PDPD

MTGMTG

BCBC

MTGMTG

BCBC

MTGMTG

BCBC

MTGMTG

BCBC

STATION POST REPLACEMENTSTechnical HH # Cantilever Stren th Tension Torsion Com ression ImReference Hei ht Catalo of U ri ht Underhun Stren th Stren th Stren th Flash

Number in. Number Sections lb. lb. lb. in.-lb. lb. Positiv

1 7.5 315202-70 1 2000 2000 7000 6000 10000 10

41 8.0 315041-70 1 4000 4000 10000 12000 20000 104 10.0 315205-70 1 2000 2000 8500 7000 10000 12

44 10.0 315044-70 1 4000 4000 15000 14000 20000 12

7 12.0 315007-70 1 2000 2000 5000 8000 10000 17

46 12.0 315046-70 1 4000 4000 20000 16000 20000 17

10 15.0 315010-70 1 2000 2000 7000 10000 15000 22

49 15.0 315049-70 1 4000 4000 20000 20000 30000 22

13 18.0 315013-70 1 2000 2000 8000 12000 15000 28

53 20.0 315053-70 1 4000 4000 15000 20000 30000 28

16 29.0 315016-70 1 1500 1500 12000 15000 25000 39

56 29.0 315056-70 1 3000 3000 25000 40000 60000 36

Special 29.0 314970-70 1 4500 4500 25000 90000 75000 39

19 43.5 315019-70 1 1700 1700 20000 60000 60000 58

173 43.5 315173-70 1 2900 2900 25000 90000 90000 61

25 58.0 315025-70 1 1200 1070 20000 40000 60000 81

174 58.0 315174-70 1 2000 1750 25000 90000 75000 81

126 72.5 315126-70 8 2 910 910 20000 40000 60000 10

175 72.5 315175-70 8 2 1450 1450 25000 90000 75000 10

128 87.0 315128-70 8 2 750 700 20000 40000 60000 12

176 87.0 315176-70 8 2 1170 1100 25000 90000 75000 12

PEDESTAL POST REPLACEMENTSTechnical HH # Cantilever Strength Tension Torsion Compression ImpReference Hei ht Catalo of U ri ht Underhun Stren th Stren th Stren th Flash


4 10.0 317004-70 1 2000 1000 5000 7000 10000 12

44 10.0 317044-70 1 4000 3000 10000 14000 20000 12

7 12.0 317007-70 1 2000 1000 5000 8000 10000 17

46 12.0 317046-70 1 4000 3000 10000 16000 20000 17

10 15.0 317010-70 1 2000 1000 7000 10000 15000 22

13 18.0 317013-70 1 2000 1000 8000 12000 15000 2853 20.0 317053-70 1 4000 2500 20000 40000 60000 28

16 29.0 317016-70 1 1500 1000 12000 15000 25000 39

56 29.0 317056-70 1 3000 2350 20000 40000 60000 41

19 43.5 317019-70 1 1700 1470 20000 40000 60000 61

173 43.5 317173-70 1 2900 2350 20000 40000 60000 61

25 58.0 317025-70 1 1700 1470 20000 40000 60000 78

174 58.0 317174-70 1 2000 1750 25000 90000 75000 81

126 72.5 317126-70 8 2 910 840 20000 40000 60000 10

175 72.5 317175-70 8 2 1450 1350 25000 90000 75000 10

128 87.0 317128-70 8 2 750 700 20000 40000 60000 12

176 87.0 317176-70 8 2 1170 1100 25000 90000 75000 12

STACKING POST REPLACEMENTSTechnical HH # Cantilever Stren th Tension Torsion Com ression ImReference Hei ht Catalo of U ri ht Underhun Stren th Stren th Stren th Flash


140 14.5 319140-70 8 1 7000 4000 20000 40000 60000 23

139 14.5 319139-70 8 1 10000 6000 25000 90000 75000 23

56 29.0 319056-70 8 2 3000 2350 20000 40000 60000 41

Special 29 .0 31 49 82- 70 8 2 4500 3500 20000 40000 60000 41

19 43.5 319019-70 8 3 1700 1470 20000 40000 60000 61

173 43.5 319173-70 8 3 2900 2400 25000 90000 75000 61

25 58.0 319025-70 8 4 1200 1070 20000 40000 60000 81

174 58.0 319174-70 8 4 2000 1750 25000 90000 75000 81

126 72.5 319126-70 8 5 910 840 20000 40000 60000 10

175 72.5 319175-70 8 5 1450 1350 25000 90000 75000 10

128 87.0 319128-70 8 6 750 700 20000 40000 60000 12

176 87.0 319176-70 8 6 1170 1100 25000 90000 75000 12


30/34

J Withstand ratings are predicated on the use of a subbase 3.50 high or its equivalent (see Spacers on page 31).

Note: The drawings shown are only illustrations and do not necessarily reflect the actual number of petticoats.

Low Frequency Impulse Test Voltage Maximum Leakage PDPD MTGMTG BCBC TOP BOTTOM TWithstand Withstand Rms to Ground RIV Distance Porcelain Mt .Surface Bolt Circle Ta Minumim Ta Minimum R

10 Sec. Wet - kV (BIL) - kV kV m at 1000kHz in. in. in. in. +.015 Thread +.015 Thread

30 95 5 50 10.5 7.0 4.25 3.0 1/2-13 0.62 1/2-13 0.62

30 95 5 50 10.0 9.50 6.12 5.0 5/8-11 0.69 5/8-11 0.6945 110 10 50 15.5 7.0 4.25 3.0 1/2-13 0.62 1/2-13 0.62

45 110 10 50 14.5 8.75 6.12 5.0 5/8-11 0.69 5/8-11 0.69

60 150 15 100 20.0 8.0 4.25 3.0 1/2-13 0.62 1/2-13 0.62

60 150 15 100 24.0 10.50 6.25 5.0 5/8-11 0.75 5/8-11 0.75

80 200 22 100 38.0 10.62 4.25 3.0 1/2-13 0.62 1/2-13 0.62

80 200 22 100 35.0 10.75 6.25 5.0 5/8-11 0.75 5/8-11 0.75

100 250 30 200 50.0 11.0 4.25 3.0 1/2-13 0.62 1/2-13 0.62

100 250 30 200 40.0 10.62 6.25 5.0 5/8-11 0.75 5/8-11 0.75

145 350 44 200 52.0 7.84 4.25 3.0 1/2-13 0.62 1/2-13 0.62

145 350 44 200 70.0 10.50 6.12 5.0 5/8-11 0.69 5/8-11 0.69

145 350 44 200 72.0 12.0 6.25 5.0 5/8-11 0.75 5/8-11 0.75 S

230 550 73 200 99.0 10.50 6.25 5.0 5/8-11 0.75 5/8-11 0.75

230 550 73 200 99.0 10.75 6.25 5.0 5/8-11 0.75 5/8-11 0.75

315 750 103 500 132.0 9.38 6.12 5.0 5/8-11 0.69 5/8-11 0.69

315 750 103 500 132.0 9.75 6.25 5.0 5/8-11 0.75 5/8-11 0.75

385 900 125 500 165.0 9.62 6.12 5.0 5/8-11 0.69 5/8-11 0.69

385 900 125 500 165.0 10.50 6.25 5.0 5/8-11 0.75 5/8-11 0.75

455 1050 146 500 198.0 9.50 6.12 5.0 5/8-11 0.69 5/8-11 0.69

455 1050 146 500 198.0 10.38 6.25 5.0 5/8-11 0.75 5/8-11 0.75

Low Frequency Impulse Test Voltage Maximum Leakage PDPD MTGMTG BCBC TOP BOTTOM TWithstand Withstand Rms to Ground RIV Distance Porcelain Mt .Surface Bolt Circle Ta Minumim Slot Flan e R

10 Sec. Wet - kV (BIL) - kV kV m at 1000kHz in. in. in. in. +.015 Thread Width Thick

45 110 10 50 12.0 8.25 4.25 3.0 1/2-13 0.62 0.53 0.38

45 110 10 50 14.0 10.0 6.25 5.0 5/8-11 0.75 .69 0.38

60 150 15 100 20.0 10.0 4.25 3.0 1/2-13 0.62 0.53 0.38

60 150 15 100 18.0 12.0 6.25 5.0 5/8-11 0.69 .69 0.38

80 200 22 100 28.0 9.50 4.25 3.0 1/2-13 0.62 0.56 0.38

100 250 30 200 45.0 9.50 4.25 3.0 1/2-13 0.62 0.56 0.38100 250 30 200 37.0 11.12 6.12 5.0 5/8-11 0.69 0.69 0.50

145 350 44 200 80.0 9.50 4.25 3.0 1/2-13 0.62 0.56 0.38

160 350 44 200 70.0 11.12 6.12 5.0 5/8-11 0.69 0.69 0.50

230 550 73 200 117.0 10.62 6.25 5.0 5/8-11 0.69 0.69 0.50

230 550 73 200 99.0 10.50 6.12 5.0 5/8-11 0.69 0.69 0.50

305 750 103 500 195.0 10.75 6.12 5.0 5/8-11 0.69 0.69 0.50

305 750 103 500 195.0 10.75 6.12 5.0 5/8-11 0.69 0.69 0.50

385 900 125 500 182.0 10.50 6.12 5.0 5/8-11 0.69 0.69 0.50

385 900 125 500 165.0 11.38 6.25 5.0 5/8-11 0.75 0.69 0.50

455 1050 146 500 198.0 10.25 6.12 5.0 5/8-11 0.69 0.69 0.50

455 1050 146 500 198.0 11.25 6.25 5.0 5/8-11 0.75 0.69 0.50

Low Frequency Impulse Test Voltage Maximum Leakage PDPD MTGMTG BCBC TOP BOTTOM TWithstand Withstand Rms to Ground RIV Distance Porcelain Mt .Surface Bolt Circle Ta Minumim Slot Flan e R

10 Sec. Wet - kV (BIL) - kV kV m at 1000kHz in. in. in. in. +.015 Thread Width Thick

75 210 22 100 33.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

75 210 22 100 33.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

160 J 350 J 44 200 66.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

160 J 350 J 44 200 66.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50 S

230 J 550 J 73 200 99.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

230 J 550 J 73 200 99.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

315 J 750 J 103 500 132.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

315 J 750 J 103 500 132.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

385 J 900 J 125 500 165.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

385 J 900 J 125 500 165.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

455 J 1050 J 146 500 198.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50

455 J 1050 J 146 500 198.0 17.0 6.25 5.0 5/8-11 0.75 0.69 0.50


31/3430

Switch operating rod insulators are essentially the same asstation posts, consisting of a single porcelain unit with aspecial cap cemented on each end. Their small diameter,strength and reliability provide an ideal method of

insulating switch operating rods to protect personnel andequipment.

Insulators are glazed light gray No. 70 as standard.Chocolate brown glaze is available on request. To specifychocolate glaze, remove -70 from the catalog number.End hardware is ferrous, hot-dip galvanized.

1-1/4", 1-1/2" OR1-1/4", 1-1/2" OR2" I.P.S . PIPE2" I.P.S . PIPE

1/2" BOLT1/2" BOLTBOTH ENDSBOTH ENDS

6.0 6.0

1.751.75TY PTY P

14.2514.25

.75.75TY PTY P

FOR BOLT ATTACHMENT TO PIPE

(4) 1/2" BOLTS(4) 1/2" BOLTSBOTH ENDSBOTH ENDS

1/2" SET S CREW1/2" SET S CREWBOTH ENDSBOTH ENDS

1-1/4" THRU1-1/4" THRU2" I.P.S. PIPE2" I.P.S . PIPE

6.0 6.0

3.503.50TY PTY P

17.5017.50

FOR CLAMP ATTACHMENT TO PIPE

8138-708138-70Catalog number 8138-70 has two removable collars that fitinto sockets on the end caps. With collars, the insulator fits1-1/4 I.P.S. pipe. Without the collars, 1-1/2 I.P.S. pipecan be used with the same insulator. This is a considerableconvenience in stock keeping.

9/16 diameter through holes are required in each pipe forfield installation of the insulator.

10891-7010891-70Catalog number 10891-70 is similar to 8138-70 but haslarger sockets on the end caps to accommodate 2 I.P.S.pipe.

61400-7061400-70Clamp attachments greatly simplify field installation ofswitch rod insulators since they keep the connection snugwithout drilling and bolting through the pipe. The clampattachment provides a secure, rigid assembly that is equallygood under tension, torsion or compression.

Catalog number 61400-70 will accommodate 1-1/4 or 1-1/2 I.P.S. pipe.

80523-7080523-70Catalog number 80523-70 is similar to 61400-70 but haslarger inside radii on the clamps to accommodate 2 I.P.S.pipe.

CHARACTERISTICS OF SWITCH ROD INSULATORSDimensions

Leakage Distance, Inches 19.0Mechanical Values

Ultimate Tensile Strength, Pounds 12000Ultimate Torsion Strength, Inch-Pounds 25000

Electrical Values

Low Frequency Dry Flashover, kV 90Low Frequency Wet Flashover, kV 70


32/34

Rain DeflectorsElectrostatic Rain Deflectors, LappPatent No. 2884479, improve the wet

flashover characteristics of the insulatorsby approximately 20% and are suppliedon all station post stacks of 1300 kV BILand above. Each shield consists of twohalf sections made from sheetaluminum.

Lapp Electrostatic Rain Deflectors areavailable for 8 through 18 bolt circles.Contact Lapp Insulator for more detailedinformation.

Figure 1 - Detail of a common raindeflector.

Figure 2- Method of installing two-piecerain deflector under bolt head during

assembly of station post stack. Do notinstall deflectors between insulatorflanges.

Transition PlatesThese transition plates are designed foruse with large diameter caps on stationpost stacks. Available in three sizes andstrength ratings, these closely spacedunits are for conversion of large boltcircle units to standard bolt circlemounting. The most common

configurations are shown in the table tothe right. Several others are alsoavailable, contact Lapp for moreinformation.

The plates are ferrous, hot-dipgalvanized. Tapped holes are .015oversize to allow for the use ofgalvanized cap screws and still provide agood fit between the threads. Hex headcapscrews, nuts and lock washers arefurnished for large bolt circle mountingonly.

SpacersMounting base number 20161 isdesigned for use with 5 bolt circleinsulators. The spacer is malleable iron,hot-dip galvanized. Four 5/8-11 X 1.25long capscrews, and lock washers aresupplied for attachment to the 5 boltcircle. Order others seperately ifrequired.

RAIN DEFLECTRAIN DEFLECTINSTALLATIOINSTALLATIO

Figure 2

RAINRAIN

DEFLECTORDEFLECTOR

SECTION A-ASECTION A-A

AA

AA

4545

BCBC

O.D.O.D.

OVEOVE

Figure 1

TRANSITION PLATE DIMENSIONSCatalog No. Strength Class BC (1)B C (1) MTG (1)MTG (1) TAPTAP BC (2)BC (2) MTG (2)MTG (2)

70397 Standard 55 6.256 .25 5/ 8-115/8-11 99 1010

61845 High Strength 55 6.256 .25 5/ 8-115/8 -11 10.3810 .38 11.5011.50

61844 Extra-High Strength 77 8.508 .50 3/4-103/4-10 1212 13.3813.38

TAPTAP

1.01.0BB BB

SECTION B-BSECTION B-B

BC (1)BC (1)

BC (2)BC (2)

MTG (2)MTG (2)

MTG (1)MTG (1)

(4) HOLES(4) HOLES .6 9 THRU .6 9 THRU

9.75 9.75

8.258.25

3.503.50

6.38 6.38

5.05.0

CCCC

(4) HOLES(4) HOLES .81THRU .81THRU

SECTION C-CSECTION C-C


33/3432

Cavity Core No. Solid Core No. Cavity Core No. Solid Core No. Cavity Core No. Solid Core No10470-70 315202-70 56241-70 314857-70 311908-70 315369-7011654-70 315046-70 59668-70 314867-70 311998-70 314914-70

24760-70 315286-70 79297-70 315391-70 311999-70 314934-70

25393-70 315041-70 80044-70 314925-70 312554-70 314867-70

25565-70 315208-70 80104-70 315369-70 312555-70 318032-70

25567-70 315214-70 80110-70 315379-70 312793-70 315174-70

27077-70 315205-70 80621-70 315367-70 312794-70 315173-70

34245-70 315222-70 90603-70 315362-70 312799-70 315128-70

34246-70 315225-70 90742-70 315308-70 312800-70 315176-70

34247-70 315227-70 91507-70 315373-70 312801-70 315044-70

34248-70 315231-70 91987-70 315330-70 312802-70 315049-70

34249-70 315267-70 93350-70 314934-70 312803-70 315053-7034250-70 315278-70 93447-70 315371-70 312812-70 315126-70

34534-70 318490-70 9521A-70 315216-70 312813-70 315175-70

34535-70 318451-70 97112-70 314914-70 312997-70 319140-70

34536-70 318453-70 97805-70 315016-70 313473-70 319019-70

34537-70 318455-70 9784-70 315007-70 313475-70 319126-70

50439-70 315316-70 9785-70 315210-70 313993-70 319056-70

50637-70 315312-70 98151-70 314732-70 314199-70 319128-70

50742-70 315304-70 98154-70 318032-70 314201-70 317056-70

50908-70 315288-70 300744-70 315391-70 314228-70 317126-70

51161-70 315291PA-70 303050-70 315308-70 314504-70 317013-70

51202-70 314161-70 305943-70 315013-70 314505-70 317016-70

51560-70 315330-70 308135-70 315010-70 314564-70 317053-7051606-70 315324-70 309386-70 315304-70 314591-70 319139-70

51688-70 315308-70 309387-70 318059-70 314615-70 317004-70

51689-70 315362-70 309388-70 315312-70 314777-70 317174-70

52161-70 315295PA-70 309588-70 318461-70 314828-70 317046-70

52591-70 315289-70 309821-70 317019-70 314965-70 315056-70

53142-70 315368-70 311313-70 318459-70 314970-70 314970-70

53143-70 315372-70 311729-70 315019-70 314982-70 314982-70

53161-70 318441PA-70 311905-70 315324-70 314994-70 319025-70

54794-70 315287-70 311906-70 315368-70

55953-70 318457-70 311907-70 315367-70


34/34

Catalog No. Page Catalog No. Page Catalog No. Page8138-70 30 315205-70 11,28 317016-70 2810891-70 30 315208-70 12 317019-70 28

20161 31 315210-70 13 317025-70 28

61400-70 30 315214-70 14 317044-70 28

61844 31 315216-70 15 317046-70 28

61845 31 315222-70 10 317053-70 28

70397 31 315225-70 11 317056-70 28

80523-70 30 315227-70 12 317126-70 28

314161-70 19 315231-70 13 317128-70 28

314732-70 23 315267-70 14 317173-70 28

314857-70 17 315278-70 15 317174-70 28

314867-70 25 315286-70 16 317175-70 28314914-70 24 315287-70 16 317176-70 28

314925-70 19 315288-70 17 318032-70 25

314934-70 24 315289-70 17 318059-70 23

314970-70 28 315291PA-70 18 318441PA-70 18

314982-70 28 315295PA-70 18 318451-70 11

315007-70 28 315304-70 19 318453-70 12

315010-70 28 315308-70 19 318455-70 13

315013-70 28 315312-70 20 318457-70 16

315016-70 28 315316-70 20 318459-70 14

315019-70 28 315324-70 21 318461-70 15

315025-70 28 315330-70 22 318490-70 10

315041-70 28 315362-70 20 319019-70 28315044-70 28 315367-70 21 319025-70 28

315046-70 28 315368-70 21 319056-70 28

315049-70 28 315369-70 21 319126-70 28

315053-70 28 315371-70 22 319128-70 28

315056-70 28 315372-70 22 319139-70 28

315126-70 28 315373-70 22 319140-70 28

315128-70 28 315379-70 23 319173-70 28

315173-70 28 315391-70 24 319174-70 28

315174-70 28 317004-70 28 319175-70 28

315175-70 28 317007-70 28 319176-70 28

315176-70 28 317010-70 28

315202-70 10,28 317013-70 28

Station Post Insulators Catalog

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