Line Post Insulator 57 Series Tie-Top Type

Product Detail

57 Series Tie-Top Type Standard: ANSI C29.7-2015 Voltage:11-66kV 1. Tie Top Porcelain Line Post Insulators are designed for upright or angle mounting on a cross arm. They are rated from 25kV to 69kV in usual line voltage, and requiring a cantilever strength of 2800lb. For wood cross arm, long studs are supplied complete with large area flat washer ,square nut and lock nut. For steel cross arm, short studs are supplied with standard hex nuts and lock nuts. 2.Conductor grooves are the wide Tie Top ANSI standard type with head and neck designed for the use Wrap lock or conventional tie wires. 3.Gray glaze is standard for this ANSI type tie top porcelain line post insulators,Brown glaze can be supplied on order. 4.The ANSI standard No. for these Tie top porcelain line post insulators are: 57-1,57-2,57-3,57-4,57-5, with S or L after the number respectively represent short stud or long stud.For example : 57-1S means: short stud is supplied with 57-1 line post insulator.

ANSI CLASS	57-1	57-2	57-3	57-4
Creepage Distance (mm)	356	559	737	1015
Dry Arcing Distance (mm)	165	241	311	368
Cantilever Strength (kN)	12.5	12.5	12.5	12.5
Low Frequency Flashover Voltage-Dry (kV)	70	100	125	140
Low Frequency Flashover Voltage-Wet (kV)	50	70	95	110
Critical Impulse Flashover Voltage-Pos. (kV)	120	160	200	230
Test Voltage to Ground (kV)	15	22	30	44
Maximum RIV at 1000KHZ (µv)	100	100	200	200
Net Weight (kg)	4.8	7.8	11.0	18.0

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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