RODURFLEX®

THE COMPOSITE INSULATOR SYSTEM

Over 30 Years Experience

with the RODURFLEX® System

LAPP INSULATOR COMPANY LLC

THE POWER OF RELIABILITY
WWW.LAPPINSULATOR.COM
 HISTORY OF LAPP INSULATOR GMBH

A PROUD TRADITION OF MANUFACTURING EXPERTISE

The LAPP Insulator GmbH facility is located in Northern Bavaria in the city of Wunsiedel,
Germany. This region of Germany is noted for the production of ceramic products, and has a
long tradition for quality and expert workmanship.
LAPP Insulator, GmbH was founded in 1879 by Phillip Rosenthal. Ph. Rosenthal & Company
initially focused on the production and development of ceramic products for electrical applications.
As the electric power industry evolved, new products were designed to meet the changing
demand for high voltage insulators. These included long rod porcelain, substation insulators
(solid and hollow core), and the addition of a high voltage test lab (in 1930).
THE INTRODUCTION OF RODURFLEX® COMPOSITE INSULATORS
Composite insulators were introduced to the world market by Ph. Rosenthal & Company in
1967 under the trade name RODURFLEX®. Composite insulators were developed to enhance
the performance of high voltage insulators in contaminated environments. The concept of
applying a silicone rubber housing over a fiberglass reinforced resin rod was first conceived
by Ph. Rosenthal & Company.
THE EXPANDING APPLICATION OF RODURFLEX®
Initial installations were in niche markets where severe environmental contamination required
routine cleaning of glass and ceramic insulators. Unlike these traditional insulating materials,
RODURFLEX® does not require washing or cleaning. Two unique properties of our silicone
rubber housing eliminate the need for cleaning:
1. The ability of the housing to repel water (known as hydrophobicity).
2. The ability of the housing to encapsulate surface contaminants, thus rendering
the contamination layer as hydrophobic as the base polymer.
These early installations were so successful, that the application of RODURFLEX® was
expanded to new voltage ratings and designs.
Terms and Warranties
All sales of LAPP products described
LAPP Insulator GmbH is a wholly owned in this catalog are subject to LAPP’s
Terms and Conditions of Sale as
subsidiary of LAPP Insulator Company LLC, USA contained in LAPP’s Sales Order or
Order Acknowledgement Forms and
the limited warranties and limitations
of liability thereunder.

I
RODURFLEX® SYNONYMOUS WITH QUALITY AND EXPERIENCE

THE HISTORY OF RODURFLEX® INSULATORS

Today, RODURFLEX® has been successfully applied in more than 50 countries at
voltages up to 1,100KV. With more than 35 years of manufacturing and service experience,
RODURFLEX® stands alone as the premier manufacturer of composite insulators.
Development of composite insulators began. After two years of extensive
1965 testing the following criteria were established for this new product:
• The base polymer for the housing and sheds (1) must be silicone rubber.
110kV Line (Germany)
This polymer has inherent resistance to UV and corona. It also provides
a hydrophobic (water repellent) surface that is desirable for resistance to
60Hz contamination flashover.
• The weathersheds (2) should be molded separately and chemically bonded
to the housing.
This allows variable leakage distances for a fixed insulator length, and
eliminates moldlines that can encourage 60Hz leakage currents.
• The metal fittings (3) must be fixed to the fiberglass core (not the silicone
housing) for maximum mechanical strength.
20kV Line (Germany) • The metal fittings require a corona ring (4) for protection of the housing.
• The housing must be chemically bonded (5) to the fiberglass core.

• Suspension class RODURFLEX® production begins.

1967
• Introduction of hydrolysis resistant resin system for the fiberglass
1974 reinforced resin rod (6).

• Introduction of high temperature vulcanized (HTV) silicone rubber to

1979 improve the mechanical characteristics of the material.
420kV Line (South Africa) • Sheath thickness increased to 3 mm to reduce the electric field strength
within the FRP rod and provide better protection for potential damage
during handling and installation.

• Meta stable silicone sealing system (8) to prevent moisture ingress to

1982 the FRP rod.

• Introduction of acid resistant glass fibers (ECR) to prevent brittle

1983 fracture of the FRP core. Rosenthal was the first manufacturer to
500kV Line (United States) recognize the performance attributes of ECR glass fibers, and to
adopt it in the manufacturing process.
• Compression type, forged steel, end fittings were introduced to improve
1985 the insulator’s mechanical strength.

765kV Line (United States)

ONLY RODURFLEX® PROVIDES RELIABILITY AND CONSISTENCY
(Canada)
• Over 35 years of field experience.
• A silicone rubber formulation that has not changed since 1979.
• No brittle fractures reported since the introduction of ECR glass (1983).
• Proven longevity with applications at all transmission class voltages.
• Extensive service experience in light to heavy contamination areas.
400kV Line (South Africa)

I
 THE RODURFLEX® SYSTEM

Design of Rodurflex® Insulators in 1967 and Today

1 1’ Interfaces FRP Rod End Fittings

Material Manufacturing Material Design Material
2 2’ 1965 RTV - Single Sheath Chemical Sealing Resin E-glass Cone/ Corona Cast
Silicone Sheds Thickness Bond RTV Standard Standard Wedge Rim Iron
0.5 mm Silcone Epoxy Type

7 1 2 7 5 8 6 6 3 4 3
7’
1970
5 2’ 5’ 4’
5’
Hydrolysis
1975
6 6’ Resistant
Epoxy
HTV - Thickness
Silicone 3 mm
6’
8 1980 1’ 7’
8’ Meta-
stable
ECR -
SIR
Glass
4
1985 Forged
4’ 8’ 6’ Compression
Type Steel

3’ 3’
1990
3 3’
1995
1967

TODAY

RODURFLEX®
insulators have
been installed
world-wide in more
than 50 countries
at all voltage levels
up to 1100KV.

1
 MECHANICAL RATING
SML=25,000 lbs. 111 kN SUSPENSION CLASS INSULATOR
RTL=12,500 lbs. 56kN

TYPICAL “X” ANSI CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET
LINE SECTION CLASS NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(kV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
32 7.7
S25YB-03K1766 74 1880 (813) 315 260 520 535 (3.5)
69 41
(1041) 32
S25YB-00K8041 86 2184 315 260 520 535 8.6
(813) (3.9)
38 8.8
S25YB-03K1767 87 2210 (980) 380 315 630 650 (4.0)
69 47 60-1
(1194) 38
S25YB-03K1768 108 2743 380 315 630 650 10.6
(985) (4.8)
45 9.3
S25YB-01K9325 106 2692 (1155) 450 385 735 750 (4.2)
115 54
(1380) 45
S25YB-03K1773 120 3048 450 385 735 750 10.1
(1160) (4.6)
51 9.9
60 60-2 S25YB-01K9326 117 2972 (1310) 515 435 840 860 (4.5)
138 (1535)
60-3 S25YB-02K0866 3632 52 515 435 840 860 12.6
143 (1325) (5.7)

3505 56 550 465 900 910 11.7

65 S25YB-00K7942 138 (1435) (5.3)
161 (1651) 60-4
S25YB-03K1774 155 3937 56 550 465 900 910 13.2
(1440) (6.0)
63 610 510 990 1010 11.9
S25YB-01K9328 140 3556 (1595) (5.4)
161 71 60-5
(1815) 63 13.0
S25YB-03K1775 170 4318 (1595) 610 510 990 1010 (5.9)
69 670 12.6
S25YB-01K9329 153 3886 (1745) 560 1080 1130 (5.7)
161 77 60-6
(1965)
4724 69 670 560 1080 1130 13.7
S25YB-03K1776 186 (1745) (6.2)
74 12.1
S25YB-01K9330 163 4140 (1875) 720 600 1165 1210 (5.5)
161/230 83 60-7
(2105) 74 14.6
S25YB-03K1777 200 5080 (1885) 720 600 1165 1210 (6.6)
79 12.6
S25YB-01K9331 173 4394 (2005) 770 650 1260 1280 (5.7)
230 88 60-8
(2235) 79 15.4
S25YB-03K1778 216 5486 (2015) 770 650 1260 1280 (7.0)
NOTES:
1. All section lengths are based on Y-Ball end fittings. See table below for length adjustments for other end fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and testings per ANSI C29.11 and C29.12.

2
 MECHANICAL RATING
SML=25,000 lbs 111 kN SUSPENSION CLASS INSULATOR
RTL=12,500 lbs. 56kN

TYPICAL “X” ANSI CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET
LINE SECTION CLASS NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(KV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
81 670 1280 1300 14.3
S25YB-03K1781 198 5029 (2060) 810 (6.5)
230 90
(2286) 81
S25YB-03K1782 234 5944 810 670 1280 1300 17.6
(2075) (8.0)

5258 89 900 720 1410 1440 14.6

S25YB-03K1783 207 (2265) (6.6)
230 98 60-9
(2489) 19.4
S25YB-03K1784 252 6401 89 900 720 1410 1440
(2280) (8.8)

5639 95 15.4
S25YB-03K1785 222 (2420) 950 770 1510 1600 (7.0)
230 104 60-10
(2642) 95 18.1
S25YB-03K1786 265 6731 (2420)
950 770 1510 1600 (8.2)

5740 99 1550 15.4

S25YB-03K1787 226 (2515) >950 780 1600 (7.0)
230 108
(2743) 60-10 100 20.7
S25YB-03K1788 276 7010 (2530)
>950 780 1550 1600 (9.4)

6528 111 >950 860 1770 1800 17.2

S25YB-03K1789 257 (2825) (7.8)
345 120 60-12
(3048) 111 20.5
S25YB-03K1790 309 7849 (2830) >950 860 1770 1800 (9.3)

10541 165 >950 >950 >2000 >2000 25.8

S25YB-03K1791 415 (4200) (11.7)
500 174 60-14
(4420) 165 32.4
S25YB-03K1792 519 13183 (4200) >950 >950 >2000 >2000 (14.7)

NOTES:
1. All section lengths are based on Y-Ball end fittings. See table below for length adjustments for other end fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and testings per ANSI C29.11 and C29.12.

TOWER LINE
FITTING FITTING LENGTH CHANGE
Inches mm
EYE BALL +0.79 +20
EYE EYE +2.76 +70
SOCKET BALL -0.79 -20
CLEVIS BALL -0.59 -15
Y-CLEVIS EYE +1.97 +50
CLEVIS EYE +1.38 +35

3
 MECHANICAL RATING
SML=30,000 lbs. 133 kN SUSPENSION CLASS INSULATOR
RTL=15,000 lbs. 67kN

TYPICAL “X” CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET

LINE SECTION NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(KV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
S30EB-03K2055 70 1785 35 350 290 580 595 7.1
45 (900) (3.2)
69 (1143)
S30EB-03K2056 2205 35 350 290 580 595 7.9
87 (900) (3.6)

S30EB-03K2057 100 2540 46 460 400 755 770 8.6

(1180) (3.9)
115 56
(1422) 46 9.7
S30EB-03K2058 121 3080 (1180) 460 400 755 770 (4.4)
53 9.5
S30EB-03K2059 110 2815 (1335) 520 440 850 870 (4.3)
138 62
(1575) 53 10.4
S30EB-03K2060 132 3355 (1330)
520 440 850 870 (4.7)

S30EB-03K2061 129 3270 58 565 485 925 940 9.9

(1475) (4.5)
161 68
(1727) 58 11.7
S30EB-03K2062 157 3990 (1485) 565 485 925 940 (5.3)

S30EB-03K2063 142 3600 65 645 540 1040 1080 11.5

74 (1640) (5.2)
161 (1880)
S30EB-03K2064 170 4320 65 645 540 1040 1080 13.7
(1650) (6.2)

S30EB-03K2065 155 3930 70 695 585 1125 1155 11.2

(1785) (5.1)
161 80
(2032) 70 13.4
S30EB-03K2066 188 4770 695 585 1125 1155
(1790) (6.1)

S30EB-03K2067 167 4240 76 740 620 1200 1240 13.0

(1920) (5.9)
161 85
(2159) 76 14.8
S30EB-03K2068 200 5080 (1925)
740 620 1200 1240 (6.7)

S30EB-03K2069 181 4600 82 820 680 1300 1320 12.6

(2090) (5.7)
230 92
(2337) 83 16.5
S30EB-03K2070 217 5500 (2105)
820 680 1300 1320 (7.5)

NOTES:
1. All section lengths are based on Eye-Ball end fittings. See table below for length adjustments for other fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and testings per ANSI C29.11 and C29.12.

4
 MECHANICAL RATING
SML=30,000 lbs. 133 kN SUSPENSION CLASS INSULATOR
RTL=15,000 lbs. 67kN

TYPICAL “X” CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET

LINE SECTION NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(kV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)

S30EB-03K2071 194 89 890 715 1400 1430 14.6

4930 (2250) (6.6)
230 98
(2489) 89 15.9
S30EB-03K2072 234 5950 (2245) 890 715 1400 1430 (7.2)

S30EB-03K2073 167 4230 96 >950 775 1520 1550 11.2

106 (2435) (5.1)
230 (2692)
S30EB-03K2074 228 5795 96 >950 775 1520 1550 15.2
(2445) (6.9)
114 17.4
123 S30EB-03K2075 255 6465 (2885) >950 900 1800 1845 (7.9)
345 (3124)
S30EB-03K2076 309 7845 114 >950 900 1800 1845 21.2
(2895) (9.6)

S30EB-03K2077 283 7200 123 >950 >950 1990 >2000 18.1

133 (3135) (8.2)
345 (3378)
S30EB-03K2078 340 8640 123 >950 >950 1990 >2000 21.6
(3140) (9.8)

S30EB-03K2079 306 7760 131 >950 >950 >2000 >2000 19.2

141 (3335) (8.7)
345 (3581)
S30EB-03K2080 372 9440 132 >950 >950 >2000 >2000 26.5
(3350) (12.0)

S30EB-03K2081 332 8425 143 >950 >950 >2000 >2000 20.5

153 (3640) (9.3)
500 (3886) 32.4
S30EB-03K2082 516 13105 143 >950 >950 >2000 >2000
(3645) (14.7)

S30EB-03K2083 330 165 >950 >950 >2000 >2000 19.8

8385 (4195) (9.0)
500 175
(4445) 165
S30EB-03K2084 519 13185 >950 >950 >2000 >2000 32.0
(4205) (14.5)

S30EB-03K2085 330 174 >950 >950 >2000 >2000 19.6

184 8385 (4425) (8.9)
500 (4674)
S30EB-03K2086 519 13175 175 >950 >950 >2000 >2000 31.7
(4440) (14.4)
NOTES:
1. All section lengths are based on Eye-Ball end fittings. See table below for length adjustments for other fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and testings per ANSI C29.11 and C29.12.
TOWER LINE
FITTING LENGTH CHANGE
FITTING
Inches mm
Y-CLEVIS BALL -0.79 -20
Y-CLEVIS EYE +1.18 +30
Y-CLEVIS SOCKET -0.39 -10
Y-CLEVIS Y-CLEVIS +0.39 +10
SOCKET BALL -1.57 -40
5 EYE EYE +1.97 +50
 MECHANICAL RATING
SML=50,000 lbs. 222 kN SUSPENSION CLASS INSULATOR
RTL=25,000 lbs. 111 kN

TYPICAL “X” ANSI CATALOG LEAKAGE Dry ARC ELECTRICAL FLASHOVER NET
LINE SECTION CLASS NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(KV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
73 31 250 14.1
45 S50EB-03K1801 1855 (795) 305 505 520 (6.4)
69 (1143)
S50EB-03K1802 87 2210 31 305 250 505 520 15.2
(805) (6.9)

100 42 340 16.1

56 S50EB-03K1803 2540 (1070) 415 685 705 (7.3)
115 (1422)
S50EB-03K1804 122 3090 42 415 340 685 705 17.4
(1065) (7.9)

111 2819 48 480 410 780 800 17.0

62 S50EB-03K1805 (1225) (7.7)
138 (1575)
S50EB-03K1806 132 3353 48 480 410 780 800 18.7
(1230) (8.5)

S50EB-03K1807 129 3277 54 530 450 870 17.9

68 (1370) 880 (8.1)
161 (1727)
S50EB-03K1808 153 3886 54 530 450 870 880 20.3
(1385) (9.2)
60 18.5
74 S50EB-03K1809 140 3556 (1520) 590 490 950 970 (8.4)
161 (1880)
S50EB-03K1810 173 4394 60 590 490 970 21.8
(1535) 950 (9.9)
66 19.8
80 S50EB-03K1811 155 3937 (1675) 660 550 1060 1100 (9.0)
161 (2032) 70-1
S50EB-03K1812 188 4775 66 660 550 1100 22.0
(1675) 1060 (10.0)
71 20.7
85 S50EB-03K1813 165 4191 (1810) 700 595 1140 1170 (9.4)
161 (2159)
S50EB-03K1814 5080 71 700 595 1140 23.6
200 (1815) 1170 (10.7)
78 21.6
92 S50EB-03K1815 179 4547 (1985) 760 650 1250 1270 (9.8)
230 (2337) 70-2
219 5563 78 760 650 1250 1270 25.4
S50EB-03K1816 (1995) (11.5)

196 84 840 690 1360 23.4

98 S50EB-03K1817 4978 (2140) 1340 (10.6)
230 (2489) 70-3
S50EB-03K1818 235 5969 84 840 690 1340 1360 25.4
(2135) (11.5)
92 20.1
106 S50EB-03K1819 162 4115 (2325) 920 745 1460 1490 (9.1)
230 (2692)
S50EB-03K1820 228 5791 92 920 745 1460 1490 25.4
(2340) (11.5)

NOTES:
1. All section lengths are based on Eye-Ball end fittings. See table below for length adjustments for other fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and testings per ANSI C29.11 and C29.12.

6
 MECHANICAL RATING
SML=50,000 lbs. 222 kN SUSPENSION CLASS INSULATOR
RTL=25,000 lbs. 111 kN

TYPICAL “X” ANSI CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET
LINE SECTION CLASS NUMBER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(kV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
6528 109 28.0
S50EB-03K1821 257 (2775) >950 >950 1730 1780 (12.7)
123 70-5
345 (3124) 109 31.7
S50EB-03K1822 309 7849 (2780) >950 >950 1730 1780 (14.4)

7137 119 >950 >950 1880 30.0

133 S50EB-03K1823 281 (3030) 1950 (13.6)
345 70-6
(3378) S50EB-03K1824 338 8585 119 >950 >950 1880 1950 34.4
(3040) (15.6)

7874 127 >950 >950 >2000 >2000 32.2

S50EB-03K1825 310 (3230) (14.6)
345 141 70-8
(3581) S50EB-03K1826 9398 127 >950 >950 >2000 >2000 35.9
370 (3235) (16.3)

139 33.5
S50EB-03K1827 330 8382 (3535) >950 >950 >2000 >2000 (15.2)
500 153 70-9
(3886) S50EB-03K1828 516 13106 139 >950 >950 >2000 >2000 47.6
(3545) (21.6)
162 33.3
S50EB-01K9360 330 8382 (4090) >950 >950 >2000 >2000 (15.1)
500 175 70-10
(4445) S50EB-02K0862 521 13106 162 >950 >950 >2000 >2000 48.9
(4110) (22.2)

S50EB-03K1829 330 8382 170 >950 >950 >2000 >2000 32.6

184 (4315) (14.8)
500 (4674) 70-11
S50EB-03K1830 517 13106 170 >950 >950 >2000 >2000 48.3
(4340) (21.9)

NOTES:
1. All section lengths are based on Eye-Ball end fittings. See table below for length adjustments for other fitting combinations.
2. Electrical values are per ANSI standards and are without corona ring(s).
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and test per ANSI C29.11 and C29.12.

TOWER LINE LENGTH CHANGE

FITTING FITTING
Inches mm
Y-CLEVIS BALL -0.59 -15
Y-CLEVIS EYE -0.20 -5
Y-CLEVIS SOCKET -1.38 -35
Y-CLEVIS Y-CLEVIS -0.79 -20
SOCKET BALL -1.18 -30
EYE EYE +0.39 +10

7
 MECHANICAL RATING
SML=100,000 lbs. 450 kN SUSPENSION CLASS INSULATOR
RTL=50,000 lbs. 225kN

TYPICAL “X” CATALOG LEAKAGE DRY ARC ELECTRICAL NET

LINE SECTION NUMBER FLASHOVER WEIGHT
VOLTAGE LENGTH (KV)
INCHES INCHES mm INCHES Lbs.
(KV) (mm) (mm) DRY WET POS NEG (kg)
80 1285 1300 48.9
230 100 S100EE-03K2032 245 6230 (2040) 775 665 (22.2)

S100EE-03K2033 246 6245 90 730 1430 1460 49.8

230 110 (2295) 910 (22.6)

345 120 376 9560 101 >950 790 64.2

S100EE-03K2034 (2555) 1590 1630 (29.2)

345 S100EE-03K2035 370 9450 372 1800 64.2

130 (2805) >950 860 1770 (29.2)

500 150 S100EE-03K2036 370 9420 131 64.8

(3315) >950 >950 >2000 >2000 (29.5)

500 165 S100EE-03K2037 371 9440 145 >950 >950 >2000 >2000 65.5
(3690) (29.8)

NOTES:
1. Electrical values are per ANSI standards and are without corona ring(s).
2. All dimensions are within allowable ANSI tolerances.
3. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
4. Dimensions, tolerances and test per ANSI C29.11 and C29.12.

8
 MECHANICAL RATING
SML=25,000 lbs. 111 kN PORCELAIN STRING REPLACEMENT
RTL=12,500 lbs. 56 kN

NUMBER TYPICAL “X” CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER NET
OF SYSTEM SECTION NUMBER WEIGHT
BELLS VOLTAGE LENGTH (KV)
INCHES INCHES Lbs.
(KV) (mm) INCHES mm (mm) DRY WET POS NEG (kg)
28.7 S25SB-03K1831 55 1410 21 200 170 340 350 6.6
5 69 (730) (540) (3.0)
34.5 1735 27 215 435 450 7.3
6 69 (876) S25SB-03K1832 68 (685) 260 (3.3)

7 115 40.5 S25SB-03K1927 79 2005 32 315 260 520 535 7.3

(1029) (825) (3.3)

8 46.0 38 310 7.9

138 (1168) S25SB-03K1928 89 2265 (960) 375 615 635 (3.6)
32.5 S25YB-03K1929 24 230 380 390 6.6
5 69 (825) 56 1425 (600) 190 (3.0)

6 69 37.75 S25YB-03K1930 66 1680 29 280 230 465 480 7.3

(959) (735) (3.3)
43.5 35 7.9
7 115 (1105) S25YB-03K1931 81 2065 (880) 340 280 565 580 (3.6)

8 138 49.2 S25YB-03K0982 89 2270 40 370 320 650 670 9.0

(1250) (1030) (4.1)

NOTES:
1. Catalog sequence S25SB is a socket/ball design with section length and leakage to match the corresponding
porcelain strings listed in column one.
2. Catalog sequence S25YB is a Y-Clevis/Ball design and increases the section length by approximately 3.25” to
compensate for elimination of the Y/Ball adapter commonly used to attach porcelain strings to the tower.

9
 CORONA RING RECOMMENDATION

Rodurflex suspension insulators are designed to be corona and RIV free for system voltages of 138kV and below. For system
voltages above 138kV, the following corona rings are recommended. These corona rings will provide corona extinction at 115%
of nominal system voltage.

INSULATOR TYPE RING LOCATION 161kV 230kV 345kV 500kV

Suspension NONE NONE NONE 7.8” diameter

TOWER P/N 601 227
25K lbs/111kN SML 6.4” diameter 7.8” diameter 13.8” diameter
LINE 17.7” diameter
30K lbs/133kN SML P/N 600 939 P/N 601 227 P/N 600 938
P/N 600 856

NONE NONE NONE 7.8” diameter

Suspension TOWER 7.8” diameter P/N 601 222
6.4” diameter 13.8” diameter
50K lbs/222kN LINE 17.7” diameter
P/N 601 013 P/N 601 222 P/N 335 043
P/N 335 044

NONE NONE NONE 7.8” diameter

Suspension TOWER P/N 601 228
100K lbs/450kN 7.8” diameter 7.8” diameter 13.8” diameter
LINE 17.7” diameter
P/N 601 228 P/N 601 228 P/N 600 129
P/N 335 045

6.4” AND 7.8” RINGS 13.8” AND 17.7” RINGS 13.8” AND 17.7” RINGS
600 939 601 938 601 129
600 013 335 043 600 856
601 227 335 044
601 222 335 045
601 228

When corona rings are applied, the insulator characteristics provided in the product tables will be changed as listed below:

161kV 230kV 345kV 500kV

Dry arc distance inches -0.5” -0.5” -1.0” -1.5”

10
 SUSPENSION INSULATORS END FITTING TYPES

INSULATOR STRENGTH RATING (SML)

25K lbs. 30K lbs. 50K lbs. 100K lbs.

120 kN 133 kN 222 kN 450 kN
Y-CLEVIS YES YES YES NO

ANSI SOCKET ANSI 52-8 NO

ANSI 52-5 ANSI 52-5 ANSI 52-11
ANSI BALL ANSI 52-8
ANSI 52-5 ANSI 52-5 ANSI 52-11 NO

ANSI CLEVIS YES YES YES NO

ANSI TONGUE YES YES YES NO

EYE YES YES YES YES

CATALOG NUMBER SYSTEM

S 25 YB XXXXXXX
S = Suspension Class 25 = 25K lbs.SML Y = Y-Clevis Fitting LAPP Sequence Number
30 = 30K lbs. SML B = Ball Fitting
50 = 50K lbs. SML S = Socket Fitting
100 = 100K lbs. SML E = Eye Fitting
C = Clevis Fitting
T = Tongue Fitting

11
 SUSPENSION END FITTING DIMENSIONS

SML
Lbs. OVAL EYE Y-CLEVIS CLEVIS TONGUE SOCKET
(kN) BALL
A B C D A B A B C A B C
25,000
(111) 1.18 2.36 0.59 0.70 0.75 1.57 0.79 1.81 0.79 0.63 0.47 min 0.79 52-5
30,000
(133) 1.18 2.36 0.59 0.70 0.75 1.57 0.79 1.81 0.79 0.63 0.47 min 0.79 52-5

50,000 52-8
(222)
1.18 2.36 0.78 1.02 0.80 1.81 0.79 2.10 0.94 0.75 0.70 min 0.94 52-11
100,000 1.14 2.95 0.98 1.37
(450)

OVAL EYE Y-CLEVIS CLEVIS TONGUE SOCKET BALL

12
 12º UPSWEEP ANGLE

2.5” (63mm) ROD DIAMETER

COMPOSITE LINE POST TRANSMISSION TYPE INSULATOR

TYPICAL “X” ANSI CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER RCL NET
LINE SECTION CLASS NUMBER WEIGHT
VOLTAGE LENGTH (kV)
INCHES INCHES Lbs. Lbs.
(kV) (mm) INCHES mm (mm) DRY WET POS NEG (kN) (kg)
24 2790 72
CLP2511-03K1957 75 1905 (605) 205 190 370 415 (12.4) (32.7)
69 35
37 CLP2511-03K1958 91 2315 26 245 215 405 445 2610 75
(660) (11.6) (34.1)

CLP2511-03K1959 86 30 290 2295 75

42 2180 (765) 260 470 505 (10.2) (34.1)
115 42
CLP2511-03K1960 109 2780 30 290 260 470 505 2295 78
(765) (10.2) (35.5)

250-41 CLP2511-03K1872 104 2645 34 330 300 530 580 1960 78

115 46 (865) (8.7) (35.5)
48 36 1960
250-47 CLP2511-03K1961 130 3295 370 330 570 615 82
(920) (8.7) (37.2)

40 1780 81
CLP2511-03K1962 110 2800 (1020) 415 365 630 680 (7.9) (36.8)
138 52
52 250-47
CLP2511-03K1963 148 3760 40 415 1780 85
(1020) 365 630 680 (7.9) (38.6)

46 1575 84
CLP2511-03K1964 126 3195 (1175) 495 430 730 780 (7.0) (38.2)
161 58
58 250-54
46 1575 89
CLP2511-03K1965 164 4155 (1175) 495 430 730 780 (7.0) (40.4)

50 465 1460 88
62 CLP2511-03K1966 144 3655 (1275) 535 795 840 (6.5) (40)
161 62 250-60
CLP2511-03K1967 50 465 795 840 1460 92
182 4615 (1275) 535 (6.5) (41.8)

56 520 945 1305 91

CLP2511-03K1968 155 3935 (1435) 600 890 (5.8) (41.4)
161 68
68 250-66
56 1305 95
CLP2511-03K1969 188 4775 (1435) 600 520 890 945 (5.8) (43.2)

78 67 1050 1125 97
230 250-75 CLP2511-03K1970 183 4670 (1690) 705 600 1105 (5.0) (44.1)

230 78 CLP2511-03K1971 231 5870 67 705 600 1050 1125 103

(1690) 1105 (5.0) (46.8)

NOTES:
1. Electrical values are per ANSI standards and are without a corona ring.
2. RCL is the maximum continuous cantilever load at which the insulator can be applied.
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and tests per ANSI C29.11 and C29.12.

13
 12º UPSWEEP ANGLE

2.5” (63mm) ROD DIAMETER

COMPOSITE LINE POST TRANSMISSION TYPE INSULATOR

TYPICAL “X” ANSI CATALOG LEAKAGE DRY ARC ELECTRICAL FLASHOVER RCL NET
LINE SECTION CLASS NUMBER WEIGHT
VOLT- LENGTH (kV)
AGE Lbs.
INCHES INCHES Lbs.
(mm) INCHES mm (mm) DRY WET POS NEG (kN) (kg)
CLP2511-03K1972 195 73
4950 (1850) 770 655 1150 1210 1035 100
84 (4.6) (45.5)
230 250-75
84 73 104
CLP2511-03K1973 233 5910 (1850) 770 655 1150 1210 1035
(4.6) (47.3)

78 680 1230 1285 965 103

90 CLP2511-03K1974 209 5320 (1975) 805 (4.3) (46.8)
230 250-85
90 CLP2511-03K1975 252 6400 78 805 680 1230 1285 965 108
(1975) (4.3) (49.1)

83 900 106
CLP2511-03K1976 224 5690 (2110) 850 720 1310 1370 (4.0) (48.2)
95 250-95
230
83 110
95 CLP2511-03K1977 252 6410 (2110) 850 720 1310 1370 900
(4.0) (50)

NOTES:
1. Electrical values are per ANSI standards and are without a corona ring.
2. RCL is the maximum continuous cantilever load at which the insulator can be applied.
3. All dimensions are within allowable ANSI tolerances.
4. Other leakage options and section lengths are available. Contact LAPP Insulator Company for special designs.
5. Dimensions, tolerances and tests per ANSI C29.11 and C29.12.

CATALOG NUMBER SYSTEM

CLP 25 1 1 XXXXXXX
Composite Line Post 25 = 2.5” Rod Diameter 1 = Bendable Gain Base 1 = Horizontal Clamptop LAPP Sequence Number
2 = Bendable Flat Base 2 = Drop Tongue
3 = Vertical Clamptop
4 = 5” Bolt Circle

14
 CLP END FITTING DIMENSIONS
HORIZONTAL AND VERTICAL FITTINGS

DIMENSIONS (Inches) A B C D E

DROP TONGUE 5.70 .86 1.65 0.78 0.75

HORIZONTAL CLAMPTOP 7.36 4.01 1.12

VERTICAL CLAMPTOP 5.11 4.0 1.18 3.33

5” BOLT CIRCLE 3.74 3.70 0.47 5.0

DROP TONGUE HORIZONTAL CLAMPTOP

5” BOLT CIRCLE VERTICAL CLAMPTOP

15
 STEEL GAIN STEEL FLAT

CLP BASE DIMENSIONS

HORIZONTAL BASES (INCHES)

DIMENSIONS INCHES A B C D E F G

BENDABLE GAIN 12.0 14.0 0.94 6.3 0.94 x 1.50 – –

BENDABLE FLAT 10.0 14.0 12.0 6.1 0.87 0.87 x 1.50 8.07

16
 LAPP INSULATOR COMPANY LLC

LAPP INSULATOR COMPANY LLC

130 Gilbert Street
LeRoy, New York 14482
Phone: (585) 768-6221
Fax: (585) 768-6219

LAPP INSULATOR GMBH

Bahnhofstrasse 5
D-95632 Wunsiedel, Germany

LAPP PUBLICATIONS
Bushing Division T&D Division
• LAPP Apparatus Bushings Catalog • Distribution Insulators Catalog
• LAPP Test Terminals Brochure • IEC Porcelain Suspension Insulators Catalog
• Repair and Diagnostics Brochure • Horizontal Vee Catalog
• Quick Link Bushing Brochure • Porcelain Suspension & Strut Insulators Catalog

Substation Division LAPP Insulator GmbH

• Station Post Insulators Catalog • RODURFLEX ® Composite Insulator System Catalog
• IEC Station Post Insulators Catalog • LAPP Insulator GmbH History Brochure
• Special Porcelain Brochure
• Cap and Pin Replacement Insulators Brochure

D OWNLOAD O UR C ATALOGS O NLINE AT:

WWW.LAPPINSULATOR.COM