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Home > Standard Type > High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
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High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory
High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory

High-Quality U420B High VoltageToughened Suspension Glass Insulator Suppliers, Factory

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Product Description

U420B Disc Suspension Insulator
Product Information
  • Model: U420B
  • U: Refers To Disc Suspension Insulator
  • 420: Indicates a rated Mechanical failing load of 420kN
  • B: For Ball And Socket Type
  • 205mm: Height of the insulator structure
  • 360mm: Diameter of the insulator disc
  • 550mm: Creepage distance of the insulator
  • Type: Standard profile Toughened Suspension Type
  • Rated mechanical load: 420kn (about 42tons)
  • Purpose: Widely applicable as insulation support for medium and high voltage transmission lines and substation equipment, capable of stable operation under various climatic conditions.
  • Standards: IEC60383-1:1993, MOD / GB/T1001.1
  • Connection: GB/T4056-2008 (IEC60120:1984, MOD) and BS 3288 part lll.
  • Locking Pin: W-pin or R-pin available. (Default: R pin for U420B)
Product Drawing
U420B Technical Drawing
Technical Parameters
IEC Designation Unit U420B/205
Mechanical failing load kn 420
Diameter D mm 360
Height H mm 205
Creepage distance L mm 550
Socket coupling mm 28
Wet power frequency withstand voltage kv 80
Dry lightning impulse withstand voltage kv 140
Power frequency puncture voltage kv 140
Radio interference voltage (10kV 1MHz) μv 50
Corona visual test kv 18/22
Power frequency electric arc voltage ka 0.12s/20Ka
Impulse puncture voltage P.U 2.8
Net weight per unit kg 16
Product Display
U420B Glass Insulator View 1 U420B Glass Insulator View 2
Frequently Asked Questions (FAQ)
Q1: What does the "U" signify in the U420B model? The "U" stands for Disc Suspension Insulator, which is a common classification for toughened glass insulators.
Q2: What is the rated mechanical load for the U420B insulator? The U420B has a rated mechanical failing load of 420kN, which is equivalent to approximately 42 tons.
Q3: Which international standards does this product comply with? The product is manufactured in accordance with IEC60383-1:1993 and the connection structure follows IEC60120 and BS 3288 part III standards.
Q4: What is the default locking pin type for the U420B? Unless there are special instructions from the customer, an R-pin is typically used as the standard locking pin for the U420B model.
Q5: What are the primary dimensions of the U420B/205 insulator? The insulator has a structural height of 205mm, a disc diameter of 360mm, and a creepage distance of 550mm.
Q6: In what environments can this insulator be used? It is designed for medium and high voltage transmission lines and substation equipment, capable of stable operation across various climatic conditions.

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