3fl long rod insulator usa
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Answers for energy.
www.siemens.com/energy/insulators
3FL Silicone Long Rod Insulators for Transmission Lines 69500 kVStrong performance reliable service
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3FL silicone long rod insulators performance meets durability
Core
The core rod is a boron-free, corrosion-re-sistant ECR2 glass-fiber-reinforced plastic rod (FRP rod). Due to the extremely high hydrolysis and acid resistance of the FRP rod the risk of so-called brittle fracture is eliminated for 3FL insulators.
End fittings
The end fittings, made of hot-dip galva-nized forged steel or ductile cast iron, are directly attached to the FRP core rod by a circumferential crimping process. Each crimping process is stringently monitored with a special control system. A complete range of end fittings according to the lat-est IEC and ANSI standards is available with 25, 30, 36 and 50 klbs of SML3. The 3FL is 100% exchangeable and compatible with existing insulators and line hardware of all types.
The special design of the end fitting in the junction minimizes the electrical field strength and partial discharge inside the junction zone as well as on the silicone housing surface, by utilizing an integrated grading ring. This prevents corrosion of the insulating material and eliminates the risk of subsequent failure of the insulator.
3FL HTV silicone rubber housing for best pollution performances
The excellent pollution layer characteristics of the HTV silicone rubber ensure maxi-mum reliability of the 3FL insulator, even under extreme service conditions. The high hydrophobicity of silicone rubber pre-vents the formation of conductive film on its surface. Even the most severe ambient conditions, such as salt fog in coastal re-gions or dust-laden air in industrial areas, cannot impair the intrinsic hydrophobicity of the HTV silicone rubber. Surface cur-rents and discharges are ruled out. Neither water nor dirt on the housing surface can cause insulator flashovers a significant factor for insulator performance.
Siemens quality
According to long-established Siemens tra-dition and experience in producing high-voltage equipment for more than a century, each production step for the 3FL begin-ning with numerous incoming raw material inspections, through the assembly of the individual components, to routine tests of the finished product is rigorously moni-tored and controlled.
Good reasons to use 3FL
The new Siemens silicone long rod in-sulators (type 3FL) combine the highest levels of electrical insulation and mechani-cal tensile strength with a compact, light-weight design. Thanks to their superior de-sign and minimized weight, 3FL long rod insulators are especially suited for over-head compact-line applications where low tower design and short line spans are re-quired. They are also more economical to transport and install.
Design
The 3FL insulator has a one-piece HTV1 silicone rubber housing made by a high-pressure injection molding process. The HTV silicone is directly molded onto the core rod by overlapping the triple junction point and part of the metal end fittings. The design ensures a total enclosure of the most sensitive part of a silicone insulator the junction zone (metal end fitting/FRP rod/silicone housing), where the highest electrical field strength is usually concen-trated. This overlapping system eliminates any possibility of moisture ingress.
3FL long rod insulators can be used either as suspension or tension insulators 3FL a superior design to meet the highest requirements
HTV silicone rubber for best pollution performances
Brittle-fracture-resistantECR-glass FRP rod
One-piece HTV silicone rubber housing
Junction point: FRP rod/metal fitting/silicone (triple point) completely embedded in the silicone housing
Integrated grading ring reduces the electric field inside and outside the junction zone
Junction zone
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Product standards
ANSI C29.11 Tests for Composite Suspension Insulation for Overhead Transmission Lines
ANSI C29.12 Insulators Composites Suspension Type
ANSI C29.1 Test Methods for Electrical Power Insulators
ANSI C29.2 Insulators Wet-process Porcelain and Toughened Glass Suspension Type
Standards and tests
All 3FL long rod insulators are designed and completely tested in compliance with the latest ANSI C29.11 and ANSI C29.12 standards for composite suspension insulators.
Each Siemens 3FL insulator that leaves the factory is routinely tested with a corre-sponding mechanical tensile test load of at least 50 percent of the defined SML load for at least ten seconds.
1HTV: High-temperature vulcanizing2ECR glass: Electrical- and corrosion-resistant glass3SML: Specified mechanical load4RIV: Radio interference voltage
Maximized service life
Minimized electrical field strength
After numerous electrical calculations re-garding E-field distribution along the insu-lator, and the connection zone on the high-voltage side in particular, the design of the 3FL insulator was optimized for maximum reduction of electrical field stress, reduced corona effect, and mini-mized RIV4 value. Two design keys ensure improved life expectancy by reducing elec-trical field stress in the triple point and on the silicone surface:
The spherical-shaped rim of the end fit-ting inside the housing homogenizes the E-field distribution on the high-volt-age side of the 3FL insulator with an in-tegrated grading ring up to 170 kV.
The overmolded design system and the silicone housing shape at the connec-tion zone reduce the electrical field strength inside the housing, at the inner triple point in particular, as well as on the silicone surface directly. This by displacing the higher electrical field strength outside the housing (i.e. to the surrounding air area), and by taking ad-vantage of the higher silicone relative permittivity.
In this way, 3FL insulators can be applied on 170 kV systems without the need for additional grading/corona rings.
No moisture ingress
The one-piece housing of the 3FL insula-tors, i.e. weathersheds and core rod sheath (coating) is one-piece, and has only one in-ternal interface throughout the whole in-sulator, namely the boundary interface be-tween the housing and the FRP core rod. This design eliminates all internal inter-faces between weathersheds and the core rod coating. These kinds of longitudinal interfaces are normally very sensitive to tangential electrical field stress, which in worst case scenarios can easily lead to ero-sion damage of the polymer interfaces. In particular leading to erosion of the bond-ing between sheds and rod sheath, and thus damage to the insulator housing.
Furthermore, the junction point in the con-nection zone, where all three elements (FRP rod, metal end fitting, and silicone housing) meet each other, is absolutely water- and air-tight sealed during manu-facturing by using an overmolding hous-ing system. It totally encloses this junction point with the HTV silicone rubber of the housing itself. The highest bonding strength of the one-piece HTV silicone housing to the FRP core rod combined with the overmolding design system prevent moisture ingress at the connection zone of the insulator.
Housing (HTV SiR)
FRP rod
Connection zone
End fitting
3FL
E-field distribution (%/mm) in silicone housing and in FRP core rod at 3FL insulator high-voltage end
E-field distribution (%/mm) at 3FL insulator high-voltage end
Silicone surface
Inner triple point
Spherical-shaped rim
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All types of end fittings in accordance with ANSI C29.12 and ANSI C29.2 are available with 25, 30, 36 and 50 klbs. In addition, all end fitting types according to IEC 61466-1
End fittings
Corona ring
Recommended corona rings (diameter in inch [mm]) by line voltage
Line voltage kV
Ground end (top end fitting)
Line end (conductor end fitting)
170 kV None None
245 kV None 8.3 ( 210)
300 kV None 13 ( 330)
362 kV None 13 ( 330)
420 kV 8.3 ( 210) 13 ( 330)
550 kV 8.3 ( 210) 16 ( 420)
Parameter Units 3FL3 3FL4 3FL5 3FL6
Electrical data
Typical line voltagefrom kV 69 69 69 69
to kV 500 500 500 500
Low frequency flashover voltage
Dryfrom kV 285 285 285 285
to kV 1,006 1,006 1,006 1,006
Wetfrom kV 219 219 219 219
to kV 814 814 814 814
Critical impulse flashover voltage
Positivefrom kV 465 465 465 465
to kV 2,820 2,820 2,820 2,820
Negativefrom kV 465 465 465 465
to kV 2,795 2,795 2,795 2,795
Mechanical data
Specified mechanical load, SMLklbs(kN)
25(111)
30(133)
36(160)
50(222)
Section length (length increments approx. 2.05 inches [52 mm])
fromin
(mm)33.4(849)
33.4(849)
35.5 (902)
35.5 (902)
toin
(mm)219.7
(5,581)219.7
(5,581)221.8
(5,634)221.8
(5,634)
Core rod diameter in
(mm) 5/8"(16)
5/8"(16)
7/8"(22)
7/8"(22)
Accessories
Arc protection devices such as arcing horns and corona rings for reduction of electrical field stress and corona effect are carefully designed based on numer-ous electrical simulations regarding electrical field distribution. For system voltages above 170 kV corona rings are included in 3FL insulator application as a standard feature. Customer-specific solu-tions as well as other connection and ca-ble clamps are also available on request.
E-field distribution (%/mm) at 3FL insulator high-voltage end equipped with corona ring
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C
B
A Eye acc. to ANSI C29.12
SMLDimensions in inch (mm)
A B C
25 and 30 klbs36 and 50 klbs
0.94 (24) 1.89 (48) 0.75 (19)
0.98 (25) 1.97 (50) 0.87 (22)
B A
Y-Clevis acc. to ANSI C29.12
SMLDimensions in inch (mm)
A B
25 and 30 klbs36 and 50 klbs
0.75 (19) 1.34 (34)
0.87 (22) 1.61 (41)
A B
C Tongue acc. to ANSI C29.2
Designation SMLDimensions in inch (mm)
A B C
52-6 25 and 30 klbs 0.50 (12.7) 0.69 (17.5) 1.81 (46)
52-10 36 klbs 0.75 (19) 0.81 (20.6) 1.81 (46)
52-12 50 klbs 0.87 (22) 0.94 (23.8) 2.05 (52)
B
C
A
D Clevis acc. to ANSI C29.2
Designation SMLDimensions in inch (mm)
A B C D
52-6 25 and 30 klbs 0.63 (16) 0.71 (18) 1.26 (32) 1.81 (46)
52-10 36 klbs 0.75 (19) 0.89 (22.5) 1.02 (26) 2.20 (56)
52-12 50 klbs 0.87 (22) 1.02 (26) 1.18 (30) 2.36 (60)
B
A C
Socket and Ball acc. to ANSI C29.2
Designation SMLDimensions in inch (mm)
A B C
52-5 25 and 30 klbs 1.3 (33) 0.67 (17) 0.75 (19)
52-8 36 klbs 1.65 (42) 0.87 (22) 0.98 (25)
52-11 50 klbs 1.65 (42) 0.87 (22) 0.98 (25)
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Typical line
voltage
Catalog number
Nominal polymer length
Section length*
Arcing distance
Leakage distance
Low frequency flashover
dry wet
Critical impulse flashover
positive negative
Corona ring installation
top / bottom
Approx. net weight
kV 3FLx- -3X1X210-2X3X41 inches mm inches mm inches mm inches mm kV kV kV kV inches / inches lbs kg
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Typical line
voltage
Catalog number
Nominal polymer length
Section length*
Arcing distance
Leakage distance
Low frequency flashover
dry wet
Critical impulse flashover
positive negative
Corona ring installation
top / bottom
Approx. net weight
kV 3FLx- -3X1X210-2X3X41 inches mm inches mm inches mm inches mm kV kV kV kV inches / inches lbs kg
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Typical line
voltage
Catalog number
Nominal polymer length
Section length
Arcing distance
Leakage distance
Low frequency flashover
dry wet
Critical impulse flashover
positive negative
Corona ring installation
top / bottom
Approx. net weight
kV 3FLx- -3X1X220-2X3X41 inches mm inches mm inches mm inches mm kV kV kV kV inches / inches lbs kg
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Typical line
voltage
Catalog number
Nominal polymer length
Section length*
Arcing distance
Leakage distance
Low frequency flashover
dry wet
Critical impulse flashover
positive negative
Corona ring installation
top / bottom
Approx. net weight
kV 3FLx- -3X1X220-2X3X41 inches mm inches mm inches mm inches mm kV kV kV kV inches / inches lbs kg
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Order number 3 F L 4 066 3 Y A 1 0 2 X X 1Polymer suspension/tension insulator: 3 F L
Specified mechanical load SML [klbs]:
25 klbs (111 kN) 3
30 klbs (133 kN) 4
36 klbs (160 kN) 5
50 klbs (222 kN) 6
Lightning impulse withstand voltage (1.2/50s, dry) LIWV/10 [kV], for example: if LIWV is 661 kV, then enter 066: 066
Internal usage: 3
Upper end fitting (ground side):
SML class / klbs: according to ANSI C29.12 and ANSI C29.2 25 30 36 50
/kN 111 133 160 222
Ball, size acc. to ANSI C29.2: 52-5 52-5 52-8 52-11 A
Socket, size acc. to ANSI C29.2: 52-5 52-5 52-8 52-11 Q
Clevis, size acc. to ANSI C29.2: 52-6 52-6 52-10 52-12 D
Tongue, size acc. to ANSI C29.2: 52-6 52-6 52-10 52-12 V
Eye, size acc. to ANSI C29.12: 25 klbs 25 klbs 40 klbs 40 klbs E
Y-clevis, size acc. to ANSI C29.12: 25 klbs 25 klbs 40 klbs 40 klbs Y
Special (other end fitting types available on request): Z
Bottom end fitting (high-voltage side):
SML class / klbs: according to ANSI C29.12 and ANSI C29.2 25 30 36 50 Torsion Angle
/kN 111 133 160 222
Ball, size acc. to ANSI C29.2: 52-5 52-5 52-8 52-11 n/a A
Socket, size acc. to ANSI C29.2: 52-5 52-5 52-8 52-11 n/a Q
Clevis, size acc. to ANSI C29.2: 52-6 52-6 52-10 52-12 0 D 90 G
Tongue, size acc. to ANSI C29.2: 52-6 52-6 52-10 52-12 0 V 90 W
Eye, size acc. to ANSI C29.12: 25 klbs 25 klbs 40 klbs 40 klbs 0 E 90 H
Y-clevis, size acc. to ANSI C29.12: 25 klbs 25 klbs 40 klbs 40 klbs 0 Y 90 XSpecial (other end fitting types available on request): Z
FRP core rod diameter :
5/8" (for 3FL3, 3FL4) 1
7/8" (for 3FL5, 3FL6) 2
Internal usage: 0
Standard:
ANSI C29.11, ANSI C29.12 2
Accessories on ground end:
Arcing horn H
Corona ring R
No accessories required X
Special Z
Accessories on line end:
Arcing horn H
Corona ring R
No accessories required X
Special Z
Application:
Single string 1
Double string 2
V-string 5
Special 9
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North America
Burlington, Ontario
Richland, Mississippi
El Marques, Quertaro
Santo Domingo
San Jose
Ciudad de Guatemala
South America
Bogota
Quito
Lima
Santa Cruz de la Sierra
Jundia, So Paulo
Santiago
Buenos Aires
Africa
Algiers
Casablanca
Tunis
Cairo
Isolo, Lagos
Douala
Addis Ababa
Nairobi
Ngaliema, Kinshasa
Ingombota Luanda
Maputo
Halfway House
Australia
Macquarie Park, NSW,
Sydney
Europe
Oslo
Espoo
Dublin
Manchester
Upplands Vsby,
Stockholm
Den Haag
Istanbul
Moscow
Vienna
Grenoble
Ljubljana
Huizingen
Bratislava
Zagreb
Gebze, Kocaeli
Athens
Bucharest
Barcelona
Sofia
Madrid
Amadora
Asia
Almaty
Gurgaon
Hanoi
Bangkok
Manila
Petaling Jaya
Jakarta
Seoul
Shanghai
Hong Kong
Dhaka
Abu Dhabi
Riyadh
Marking and nameplate of 3FL insulators
A nameplate is installed on each 3FL insulator when it successfully passes the mechanical routine test. It is a weather- and UV-proof stainless steel band with locking system, placed on the ground end fitting of the insulator. The etched marking includes: catalog number, SML, RTL, CIF, creepage distance, end fittings designa-tion, and production date code.
Packaging
3FL insulators are packaged in wooden crates with the following dimensions: width is 44 inches (1,120 mm), height is equal to or lower than 37.16 inches (944 mm), the length is determined by the insulator length. The maximum weight of one crate is 2,000 pounds (900 kg).
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Published by and copyright 2012: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany
Siemens AG Energy Sector Power Transmission Division High Voltage Products Nonnendammallee 104 13629 Berlin, Germany www.siemens.com/energy/insulators
Please contact us at: Phone: +49 30 386 33 222 Fax: +49 30 386 26 721 E-mail: insulators.energy@siemens.com
US Location Siemens Energy, Inc. Power Transmission Division 444 Highway 49 South Richland, MS 39218 www.siemens.com/energy/insulators Please contact us at: Toll-free: +1 (877) 742-3309 Phone: +1 (601) 932-9800
Power Transmission Division Order No. E50001-G630-A216-X-4AUS Printed in Germany Dispo 30002, c4bs No. 7457 fb 5022 W 471777 WS 08121.0
Printed on elementary chlorine-free bleached paper.
All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners.
Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.
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