CATALOG 013Polymer

Station Post Insulatorsfor 69 to 345 kV

Applications

NGK-Locke Polymer Insulators, Inc.Virginia Beach, Virginia, U.S.A.

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

TABLE of CONTENTSPolymer Station Post Insulators.............................................................................. 1Application Guidelines for Polymer Station Posts (SP) ........................................ 2Catalog Number System........................................................................................ 3Corona Ring Application ........................................................................................ 3Standard Strength Station Post Application with 2.5 Core .................................... 4High Strength Station Post Application with 3.5 Core .......................................... 5Research & Development ...................................................................................... 6Packaging .............................................................................................................. 6

NGK-Locke Polymer Insulators, Inc. is ISO 9001:2000 certified by the British Standards Institutes,BSI. BSI is accredited by NACCA, RAB, and RvC.

Quality SystemISO 9001 Certified

Certificate Number FM36580

1

Polymer Station Post InsulatorsNGK-Locke Polymer Insulators (NLPI) provides polymer stationpost (SP) insulators that are manufactured using the sameunsurpassed designs, materials, and quality control used in ourpolymer suspension & line post insulators. Our end fitting sealingsystem employs double O-rings plus an RTV sealant that havedemonstrated excellent protection against moisture penetration.The housing material is silicone rubber, which provides excellentcontamination performance. This housing is formed by compressionmolding silicone rubber onto the core as one continuous part free ofany joints. Both housing and core are chemically bonded togetherduring the vulcanization process. The strength of this bond isgreater than the tearing strength of the silicone housing materialitself. End fittings are then assembled by a pressure controlled,multi-step, crimping process. Overall length and hole alignmentare controlled by NLPIs unique design and manufacturing process.

Polymer SP Structure

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

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This process provides the SP with more severe tolerances required for substation equipment. Asshown below, NLPIs polymer station post insulators have excellent seismic performance due totheir flexibility. NLPI produces polymer SP with a 2.5 and a 3.5 diameter solid core.

230kV, 3.5 SP (Bus Support) Seismic Test on 230kV, 3.5 SP 69kV, 3.5 SPin accordance with IEEE 693

Application Guidelines for Polymer Station Posts (SP) NLPIs SP complies with dimensional and electrical values in accordance with ANSI C29.9

Technical Reference (TR) Number. The cantilever and tension strengths exceed therequired values of the ANSI standard. Compression and torsion strengths are given asguaranteed values.

Specified Cantilever Load (SCL) is breaking load guaranteed by manufacturer and shouldbe less than Cantilever Breaking Load (CBL), which is the maximum load reached during acantilever breaking test.

The deflection values shown in this catalog correspond to the deflections measured at therelevant ANSI TR porcelains Maximum Working Load (MWL is specified as 40% of the ANSITR porcelains cantilever strength).

SP for underhung applications are also available. Contact your NGK representative formore information.

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

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Corona Ring ApplicationRecommended Mounting DirectionRing Mounting Detail

W Grading Ring X Grading Ring

BottomFlangeBase

Top FlangeBase

DesignVariation

Numberof Sheds

Core Dia.2: 2.54: 3.5

Type ofInsulatorS: Station

PostShed Shape

N: Standard LeakageG: Bigger Sheds on Both Ends

for 2.5 SPH: Bigger Sheds on Both Ends

for 3.5 SP

Grading Ring ApplicationNone: BIL750kV & below

W: 11 ring for 2.5 SPX: 15 ring for 3.5 SP

Opening Side

CATALOG NUMBER SYSTEM

S 2 S N 4 7 1 2 2 W

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

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BIL and Canti- Deflection, Power-NGK Impulse Leakage lever Com- at TRs MWL

*4 Critical Frequency Approx.TR*1 Catalog # Withstand,Height, distance, SCL*2, pression

*3, TRs Impulse Wet

Max. RIV, WeightkV

inch inch K lbs. K lbs. MWL, inch Pos., kV Withstand,V/kV lbs.

K lbs. kV

278

286287288289291295304308312316

S2-SG191-21

S2-SG311-21

S2-SN311-21

S2-SN361-21

S2-SN471-22-W

S2-SN551-22-W

350

550

650

750

900

1050

30

45

54

62

80

92

78.9

128

129

150

196

229

4.5

2.8

2.3

2.0

2.0

1.8

25.0

12.0

8.0

6.0

3.5

2.5

1.20

0.681.040.560.880.480.740.380.580.320.50

0.8

1.82.72.53.93.35

5.58.46.710.5

390

610

710

810

1010

1210

145

230

275

315

385

455

200/44

200/73

200/88

500/103

500/146

500/146

35

45

47

51

67

74

Standard Strength Station Post Application with 2.5 Core

*1: ANSI Technical Reference Number*2: Specified Cantilever Load was determined using high strength bolts.

Depending on the grade of bolt, a bolt failure may occur before core failure.*3: Compression values are based on testing per the procedure specified in ANSI C29.9-1983 using fixed ends.

Actual application conditions may result in different compression strength values.*4: Deflection measured at the relevant ANSI C29.9-1983 TR porcelains maximum working load.

Flange End Fitting Detail

S2-SN311-21

Hei

ght

The dimensions are in inches. The metric equivalents (millimeters)are shown in ( ).

Tensile Strength: 25K lbs.Torsion Strength: 30K in-lbs.

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

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High Strength Station Post Application with 3.5 CoreBIL and Canti- Deflection, Power-

NGK Impulse Leakage lever Com- at TRs MWL*5 Critical Frequency Approx.

TR*1 Catalog # Withstand,Height, BCD, distance, SCL*3, pression

*4, TRs Impulse Wet

Max. RIV, WeightkV

inch inch inch K lbs. K lbs. MWL, inch Pos., kV Withstand,V/kV lbs.

K lbs. kV

278

286287288289291295304308312316324367*6369*6330371373

S4-SH151-22

S4-SH251-22

S4-SN311-22

S4-SN361-22

S4-SN461-11-X

S4-SN541-11-X

S4-SN641-13-X

S4-SN741-11-X

350

550

650

750

900

1050

1300

1470

30

45

54

62

80

92

106

122

5

5

5

5

5, 7*2

5, 7*2

5

5, 7*2

72.9

117

137

160

204

240

285

329

8.0

5.0

4.1

3.6

4.5

3.9

2.3

2.9

45.0

45.0

35.0

26.0

16.0

11.0

8.2

6.2

1.20

0.681.040.560.880.480.740.380.580.320.500.400.580.820.360.470.70

0.3

0.50.80.81.21.11.61.62.41.93.04.05.78.15.36.910.3

390

610

710

810

1010

1210

1410

1610

145

230

275

315

385

455

525

590

200/44

200/73

200/88

500/103

500/146

500/146

1000/220

1000/220

54

70

78

86

128

141

156

174

*1: ANSI Technical Reference Number*2: The mechanical load was determined using a 7-inch BCD mounted specimen.

Care should be taken when a specimen is mounted using 5-inch BCD.*3: Specified Cantilever Load was determined using high strength bolts.

Depending on the grade of bolt, a bolt failure may occur before core failure.*4: Compression values are based on testing per the procedure specified in ANSI C29.9-1983 using fixed ends.

Actual application conditions may result in different compression strength values.*5: Deflection measured at the relevant ANSI C29.9-1983 TR porcelains maximum working load.*6: BCD at bottom flange is 5 inch though the porcelains TR specifies 7 inch BCD.

S4-SN541-11-X

Flange End Fitting Detail

Hei

ght

The dimensions are in inches. The metric equivalents (millimeters)are shown in ( ).

Tensile Strength: 25K lbs.Torsion Strength: 55K in-lbs.

NGK-Locke Polymer Insulators, Inc. Station Post Insulators

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Research & DevelopmentThe station post insulators were subjected to various mechanical, electrical, and aging tests to validatethe design. Some tests and the facilites are introduced in the following.

Cantilever Strength Torsion Strength Test Compression Strength TestTest

PackagingAll of NLPIs insulators are packed in weatherproof containers in order to protect the products during land,air, and sea transportation. Several different grades of packaging can be offered depending on the modeof transport and the expected storage conditions. The packaging options that we offer are 1) standardgrade/prefabricated packing, 2) economical grade/cardboard carton, and 3) best grade/closed woodencrate. Since the user best knows their crate requirements, they should select the option that is most suitedto their needs and include that information in the purchasing specification. Special packagingarrangements can be accommodated upon request.

Each container is marked with the number of insulators it contains, the catalog number, themanufacturers name, and any other customer requests. Also, a Polymer Station Post Insulator HandlingInstruction sheet is included with all containers. This sheet states any necessary cautions duringhandling, transportation, and installation. If corona rings are to be included, a corona ring installationsheet is also provided.

Critical Impulse Flashover Test Low-Frequency Wet Withstand Test

NGK-Locke Polymer Insulators, Inc.

PE0100013

U.S.A.NGK-Locke, Inc.2525 Insulator DriveBaltimore, Maryland 21230, U.S.A.Tel: +1(410) 347-1700 Fax: +1(410) 347-1724

CanadaNGK Insulators of Canada, Ltd.Toronto Office2700 Matheson Blvd. East, Suite 700 East Tower, Mississauga L4W 4V9, Ontario, CanadaTel: +1(905) 602-1266 Fax: +1(905) 238-8247

Montreal Office1501, avenue McGill College Bureau 515 Montreal (Quebec) H3A 3M8, CanadaTel: +1(514) 281-8488 Fax: +1(514) 281-8596

EuropeNGK Europe, S.A.Rue dHerchies 184, B-7331 Baudour, BelgiumTel: +32(65) 76-1440 Fax: +32(65) 64-3554

All Other Countries NGK Insulators, Ltd.Overseas DepartmentMarunouchi Bldg. 25F2-4-1, Marunouchi, Chiyoda-ku,Tokyo 100-6325, JapanTel: 81(3) 6213-8813 Fax: 81(3) 6213-8888

NGK INSULATORS, LTD.

NGK-Locke Polymer Insulators, Inc.1609 Diamond Springs Road, Virginia Beach, Virginia 23455, U.S.A.

Tel: +1(757) 460-3649 Fax: +1(757) 460-3550