Line Post Insulator 57 Series Vertical Clamp Type and Horizontal Clamp Type

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Standard: IEC60383, ANSI C29.1, ANSI C29.7 Voltage:15-45kV Vertical clamp type line post mounted upright on crossarms and structures Horizontal clamp type line post assemblies for ratings 15 kV through 45 kV. Vertical clamp type line post mounted upright on cross arms and structures 1.These Horizontal Mounting Porcelain Line Post Insulators are used for flat surface mounting, having a mounting base for attaching to pole gains or bracket for mounting on concrete or steel poles and steel structures.They are rated from 25kV to 115kV. 2.They each are made up of a clamp ,a metal cap on the insulator head, a flat base, a insulator body and a stud.Clamps are for conductor sizes from 0.25″ to 2.70″. Gray color and brown color are available. Studs are also supplied according to requirement. 3.The ANSI standard No. for these Horizontal Mounting Porcelain Line Post Insulators are : 57-21,57-22,57-23,57-24,57-25 etc. Horizontal clamp type line post assemblies for ratings 15 kV through 45 kV. 1.Clamp Top Porcelain Line Post Insulators are designed for upright mounting on cross arm or structures.They are made up of clamps , insulator body and studs and are rated from 25kV to 115kV,requiring a cantilever strength of 2800lB. 2.A metal cap, cemented to the outside of the insulator head,supports the trunion type clamp. There is a single cap screw at one end of the clamp with captive lock washers allowing easy,quick installation and removal of clamp. 3.Clamps for use with these insulators are for standard trunion type.Clamps for all conductor sizes from 0.25″ to 2.70″ in ferrous or aluminum.Gray glaze is standard for this Clamp Top Porcelain Line Post Insulators. Brown glaze is also offered when required. 4.The ANSI standard No for these Clamp top porcelain line post insulators are as follow: 57-11,57-12,57-13,57-14,57-15 etc.

ANSI CLASS	57-11	57-21	57-12	57-22	57-13	57-23
Creepage Distance (mm)	356	356	559	559	737	737
H - Height To Middle of Clamp Assembly	257	276	333	352	400	419
D - Diameter	146	146	160	160	160	160
C - Clamp Throat Width	102	102	102	102	102	102
Dry Arcing Distance(mm)	165	165	241	241	311	311
Cantilever Strength(kN)	12.5	12.5	12.5	12.5	12.5	12.5
Low Frequency Flashover Voltage-Dry(kV)	70	70	100	100	125	125
Low Frequency Flashover Voltage-Wet(kV)	50	50	70	70	95	95
Critical Impulse Flashover Voltage-Pos.,(kV)	120	120	160	160	200	200
Test Voltage to Ground(kV)	15	15	22	22	30	30
Maximum RIV at 1000KHZ(μv)	100	100	100	100	200	200

Yongjiu Electric Power Fitting Co., Ltd, is a primary domestic professional manufacturerof electric power fitting and cable accessory. Our main products are cable connector, line fitting,(Copper Aluminium and iron), cable accessory, plastic products, power tools.fuse(LV& HV), light arrester and insulator with approved quality complying with IS09001/2000. Our company was founded in 1989. Our company is located in Liushi Town, Wenzhou , which is the center of electrical equipment in China. It is about 15 km from Wenzhou Airport and Railway Station. Covering an area of 20,000 square meters, our company has more than 300 skiklled staff, including 38 senior & intermediate technical personnel and administrativepersonnel. Focussing attention on renovation, our company has sucessfully developed more than 500 series products. With intermationally advanced machinery processing facilities, our company is capable of producing various electric power fitting and cable accessory to meet customers' special requirement. Our products have been exported to more than 40 countries and they are sold well in those coutries and regions. We enjoy a good reputation among customers due to unique styles and consistently high quality. Adheringto the principle of "Sincere Service, Faithful Reputaitob and Top Priority of Customers", we always try our best to provide excellent after-sales service. We sincerely welcome clients all over the world to establish business relationships with us for a mutual development.

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Line Post Insulator 57 Series Vertical Clamp Type and Horizontal Clamp Type

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