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Home > Anti-Pollution Type > China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
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China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory
China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory

China 120kn Toughened Glass Insulator Suspension Tension Disc Insulator Anti-Pollution Manufacturers, Factory

High Voltage Line Toughened Glass Suspension Insulator 120 kN Anti-Pollution IEC Standard Isolators Toughened Glass Disc

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Product Description

Product Information

U120BLP Insulator

Model: U120BLP

  • U - Disc Suspension Insulator
  • 120 - Rated Mechanical failing load of 120kN
  • B - Ball and Socket Type
  • L - Long steel feet
  • P - Anti-Pollution type glass Insulator

Dimensions & Creepage

  • 280 - Disc diameter is 280mm (320mm optional)
  • 146 - Structure height is 146mm
  • 450 - Creepage distance is 450mm (550mm optional)

📌 Type: Anti-Pollution Profile Toughened Suspension Type

📌 Rated mechanical load: 120kn (approx. 12 tons)

📌 Purpose: Insulation support for medium and high voltage transmission lines and substation equipment across various climates.

  • Model follows IEC60383-1:1993 / GB/T1001.1 standards.
  • Connection structure compliant with GB/T4056-2008 and BS 3288 part III.
  • Locking pin options: W-pin (Standard) or R-pin.

Technical Drawing

Technical Drawing

Technical Parameters

Designation U120BLP U120BLP1
Reference Type - UG120B146/450H UG120B146/550H
Mechanical failing load kN 120 120
Nominal Diameter D mm 280 320
Nominal Spacing P mm 146 146
Creepage distance L mm 450 550
Socket coupling mm 16 16
Wet power frequency withstand voltage kv 50 55
Dry lightning impulse withstand voltage kv 125 140
Power frequency puncture voltage kv 130 130
Radio interference voltage (10kV 1MHz) Ξv 50 50
Net weight per unit kg 5.8 9.2

Suspension Insulator Components

Components Diagram

Essential Elements:

  • Dielectric: Toughened glass shaped for specific environmental functionality.
  • Cap: Hot-dip galvanized nodular or ductile malleable cast iron.
  • Pin: Hot-dip galvanized forged steel.
  • Assembly: Assembled using specialized aluminous cement for thermomechanical strength.
  • Locking Device: Stainless steel or phosphor bronze split pin (W-pin or R-pin).
  • Protection: Optional anti-corrosion zinc sleeve (sacrificial anode) for heavy pollution areas.

Insulator Shell Cross-section

Under long-term electrical stress, contaminants can trigger local arcs. The design provides sufficient creepage distance to disperse electric field strength, reducing local discharge risk and extending service life.

Cross-section View

Product Display

Insulator View 1 Insulator View 2 Packaging

Frequently Asked Questions (FAQ)

1. What does the "120" in U120BLP stand for?
The "120" indicates the rated mechanical failing load of the insulator, which is 120kN (approximately 12 tons).
2. Why is this considered an "Anti-Pollution" type?
The "P" designation stands for anti-pollution. These insulators are designed with a profile that provides a longer creepage distance (450mm to 550mm) to prevent flashovers in contaminated environments.
3. What standards does the U120BLP comply with?
The product model is manufactured in accordance with IEC60383-1:1993 and GB/T1001.1 standards. The connection structures meet IEC60120 and BS 3288 part III requirements.
4. What materials are used for the main components?
The dielectric is made of toughened glass, the cap is hot-dip galvanized nodular cast iron, and the pin is hot-dip galvanized forged steel.
5. What is the difference between W-pin and R-pin?
These are types of locking devices (split pins) used to secure the coupling. By default, the U120BP uses a W-pin unless otherwise specified by the customer.
6. How does a zinc sleeve help the insulator?
A zinc sleeve acts as a sacrificial anode to protect the steel pin from corrosion. It is highly recommended for insulators installed in lines located in areas with heavy industrial or saline pollution.

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