SOLID-CORE PORCELAIN

LINE POST INSULATORS

CATALOG NUMBER D12A

SALES OFFICES

NGK-LOCKE, INC. (BALTIMORE OFFICE)

2525 Insulator Drive,

Baltimore Maryland 21230 U.S.A

Tel : (410) 347-1700 Fax : (410) 347-1724

NGK-LOCKE, INC. (ATLANTA OFFICE)

245 Peachtree Center Avenue, N.E.

Suite 2425 Atlanta, Georgia 30303 U.S.A

Tel : (404) 659-3153 Fax : (404) 524-6185

NGK-LOCKE, INC. (DALLAS OFFICE)

12200 Ford Road, Suite 360

Dallas, Texas 75234 U.S.A

Tel : (972) 241-5450 Fax : (972) 243-6634

NGK-LOCKE, INC. (LOS ANGELES OFFICE)

21250 Hawthorne Boulevard

Suite 765, Torrance California 90503 U.S.A

Tel : (310) 316-3323 Fax : (310) 316-3944

NGK INSULATORS OF CANADA, LTD.

(TORONTO OFFICE)

2700 Matheson Boulevard East Suite 700,

East Tower, Mississauga, Ontario L4W 4V9 CANADA

Tel : (905) 602-1266 Fax : (905) 238-8247

NGK INSULATORS DU CANADA, LTEE.

(MONTREAL OFFICE)

1501 McGill College Avenue Suite 515

Montreal (Quebec) H3A 3M8 CANADA

Tel : (514) 281-8488 Fax : (514) 281-8596

Printed in USA 1/03

Copyright by NGK INSULATORS, LTD.

Clamp-top type with Stud Base

(Vertical Use)

Clamp-top type with Stud Base

(Horizontal Use)

Clamp-top type with Curved Base

(Horizontal Use)1,500 1,875 2,000 2,800 2,800 2,800(6.7) (8.4) (9.0) (12.5) (12.5) (12.5)

C N

Impulse voltage (kV)

DA-85192W

Configuration

SELECTION GUIDE OF NGK SOLID-CORE PORCELAIN LINE POST INSULATORS

DA-85023E DA-85192Y DA-85192L250 235 DA-85022E DA-85191Y DA-85191L DA-85191W

DA-75007W200 DA-85021E DA-85190Y DA-85190L DA-85190W

DA-65008E DA-75007Y DA-75007L170

DA-45011W DA-55004E DA-55011Y DA-55011L DA-55011W

110 DA-45026K DA-49005K DA-45008K DA-45011Y DA-45011L

DA-35022Y DA-35022L DA-35022W85 DA-35025K DA-39001K

150

Type Tie-top type with Stud Base (Vertical & Horizontal Use)

Cantilever Strength lb.(kN)

2,800(12.5)

Designation of Neck

80

STANDARD PARTICULARSCat. No.ANSI ClassDesignation of NeckHeight A in. (mm) 7-3/4 (197) 9-1/2 (241) 7-1/2 (191) 9-7/16 (240) 8-3/4 (222)Diameter B in. (mm) 5-1/4 (133) 5-1/4 (133) 5-1/2 (140) 5-1/2 (140) 5-3/4 (146)Diameter C in. (mm) 3-3/4 (95) 3-3/4 (95) 3-3/4 (95) 3-3/4 (95) 4 (102)Thread D in. (mm)Minimum leakage distance in. (mm) 11 (280) 15 (381) 11 (280) 15 (381) 14 (356)Dry arcing distance in. (mm) 5-3/4 (146) 7-9/16 (192) 5-3/4 (146) 7-9/16 (192) 6-1/2 (165)Cantilever strength Ib. (kN) 1,500 (6.7) 1,500 (6.7) 2,000 (9) 1,875 (8.4) 2,800 (12.5)

Low Dry kV 80 95 80 95 80Frequency Wet kV 55 65 55 65 60Critical Positive kV 105 135 105 135 130mpulse Negative kV 130 190 130 190 155Low Dry kV 60 75 60 75 60Frequency Wet kV 40 50 40 50 45Impulse kV 85 110 85 110 110Test voltage kV 15 15 15 15 15Max. RIV at 1,000 kHz V 50 50 50 50 100

Net weight Ib. (kg) 8 (3.6) 10 (4.5) 8.5 (3.9) 10.5 (4.8) 11 (5)Standard specification ANSI C29.7-1996

STANDARD PARTICULARSCat. No.ANSI ClassDesignation of NeckHeight A in. (mm) 12 (305) 14-1/2 (369) 17 (432) 20 (508) 23 (584)Diameter B in. (mm) 5-3/4 (146) 6 (152) 7 (178) 7 (178) 7-5/16 (185)Diameter C in. (mm) 4 (102) 4-1/2 (114) 5 (127) 5 (127) 5-1/2 (140)Thread D in. (mm)Minimum leakage distance in. (mm) 22 (559) 29 (737) 40 (1015) 45 (1145) 53 (1345)Dry arcing distance in. (mm) 9-1/2 (241) 12-1/4 (311) 14-1/2 (368) 17-1/4 (438) 19-1/4 (489)Cantilever strength Ib. (kN) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5)

Low Dry kV 110 125 150 175 200Frequency Wet kV 85 100 125 150 170Critical Positive kV 180 210 255 290 330mpulse Negative kV 205 260 340 380 425Low Dry kV 90 100 120 140 160Frequency Wet kV 65 80 100 120 135Impulse kV 150 170 200 235 250Test voltage kV 22 30 44 44 44Max. RIV at 1,000 kHz V 100 200 200 200 200

Net weight Ib. (kg) 17 (7.7) 22 (10) 36 (16) 46 (21) 51 (23)Standard specification ANSI C29.7-1996

57-4N

3/4-10UNC

57-2F

3/4-10UNC 3/4-10UNC

57-3F

DA-85023E

F

3/4-10UNC3/4-10UNC 3/4-10UNC

DA-55004E DA-65008E DA-85021E DA-85022E

DA-39001K DA-49005K DA-45008K

F57-1

F

3/4-10UNC

DA-35025K DA-45026K

C C

3/4-10UNC

57-5N N

57-6

3/4-10UNC 7/8-9UNC

Average flashover voltage

Withstand voltage

Radio-influence voltage data

Average flashover voltage

Withstand voltage

Radio-influence voltage data

Vertical & Horizontal Mounting Tie-top Type With Stud Base

C & F-Neck N-Neck

STANDARD PARTICULARSCat. No.ANSI ClassHeight A in. (mm) 9-1/4 (235) 10-5/8 (270) 13-3/4 (349) 16-1/2 (419)Diameter B in. (mm) 5-1/2 (140) 5-3/4 (146) 6 (152) 6 (152)Diameter C in. (mm) 4 (102) 4 (102) 4-1/2 (114) 4-1/2 (114)Thread D in. (mm)Minimum leakage distance in. (mm) 10 (254) 14 (356) 22 (559) 29 (737)Dry arcing distance in. (mm) 5 (127) 6-1/2 (165) 9-1/2 (241) 12-1/4 (311)Cantilever strength Ib. (kN) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5)

Low Dry kV 70 80 110 125Frequency Wet kV 50 60 85 100Critical Positive kV 100 130 180 210mpulse Negative kV 125 155 205 260Low Dry kV 55 60 90 100Frequency Wet kV 40 45 65 80Impulse kV 80 110 150 170Test voltage kV 15 15 22 30Max. RIV at 1,000 kHz V 50 100 100 200

Net weight Ib. (kg) 13 (5.9) 15 (6.8) 22 (10) 26 (11.8)Standard specification ANSI C29.7-1996

STANDARD PARTICULARSCat. No.ANSI ClassHeight A in. (mm) 19 (483) 21-5/8 (549) 24-1/4 (616)Diameter B in. (mm) 6-3/4 (172) 6-3/4 (172) 7-1/4 (185)Diameter C in. (mm) 5 (127) 5 (127) 5-1/2 (140)Thread D in. (mm)Minimum leakage distance in. (mm) 40 (1015) 45 (1145) 53 (1345)Dry arcing distance in. (mm) 14-1/2 (368) 17-1/4 (438) 19-1/4 (489)Cantilever strength Ib. (kN) 2,800 (12.5) 2,800 (12.5) 2,800 (12.5)

Low Dry kV 150 175 200Frequency Wet kV 125 150 170Critical Positive kV 255 290 330mpulse Negative kV 340 380 425Low Dry kV 120 140 160Frequency Wet kV 100 120 135Impulse kV 200 235 250Test voltage kV 44 44 44Max. RIV at 1,000 kHz V 200 200 200

Net weight Ib. (kg) 35 (15.9) 41 (18.6) 50 (22.7)Standard specification ANSI C29.7-1996

7/8-9UNC

DA-85192Y57-14

3/4-10UNC

DA-85191Y57-15 57-16

57-13DA-55011Y DA-75007Y

Withstand voltage

DA-35022Y DA-45011Y

57-1257-11

3/4-10UNC

Radio-influence voltage data

3/4-10UNC 3/4-10UNC

DA-85190Y

Average flashover voltage

Withstand voltage

Radio-influence voltage data

Average flashover voltage

3/4-10UNC 3/4-10UNC

Vertical Mounting Clamp-top Type With Stud Base(2" Trunnion bolt and Locknut)