Wholesale U120BL(146/255/320) Glass Insulator Suppliers, Factories

  • Disk type suspended glass insulators are used for insulation and fixing wires in high-voltage overhead transmission and distribution lines;
  • Generally assembled into insulator strings for use on lines of different voltage levels;
  • Ordinary insulators are suitable for general areas;
  • Appropriately increasing the number of insulator pieces can improve the pollution flashover performance.

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Product Description

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Product Information

IEC Standard: U120BL

U Disc Suspension Insulator
120 Mechanical failing load of 120kN
B Ball And Socket Type
L Longer steel pin (Height 146mm)
U120BL Diagram
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Dimensional Data
Spacing (S) 146mm
Diameter (D) 255mm
Creepage distance (L) 320mm
Socket coupling 16mm
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Mechanical Values
Mechanical failing load 120kN
Mechanical residual strength 96kN
Electrical Values
Wet power frequency withstand voltage 40kV
Dry lightning impulse withstand voltage 100kV
Power frequency puncture voltage 130kV
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Radio-influence Voltage
RIV test voltage rms to ground / Max RIV at 1000 kHz 10 kV / 50 μV
Corona visual lest P/C 18/22 KV
Power frequency electric arc voltage 0.12s/20kA
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Packing Information
Net weight 4.0kg
Carton Quantity 5pcs / 6pcs
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Industry Standards

Manufactured accordance with IEC60383-1:1993 MOD / GB/T1001.1

Testing Standards
Frequently Asked Questions (FAQ)
What is the mechanical failing load of the U120BL insulator?
The U120BL disc suspension insulator has a mechanical failing load of 120kN and a mechanical residual strength of 96kN.
What are the main dimensions of this product?
The insulator features a spacing height of 146mm, a diameter of 255mm, and a creepage distance of 320mm.
Does this insulator comply with international standards?
Yes, it is manufactured in accordance with IEC60383-1:1993 MOD and GB/T1001.1 standards.
What are the electrical performance specifications?
It has a wet power frequency withstand voltage of 40kV, dry lightning impulse withstand voltage of 100kV, and a puncture voltage of 130kV.
How is the U120BL typically packaged?
The product is usually packed in cartons containing either 5 pieces or 6 pieces, with each unit weighing approximately 4.0kg.
What type of coupling does the U120BL use?
It uses a Ball and Socket type coupling with a size of 16mm.

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