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Home > Standard Type > High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
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High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier
High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier

High-Quality 70kN U70bp/U70blp Anti-Pollution Fog Type Glass Insulator IEC Standards for High Voltage Lines Manufacturers, Supplier

Premium Suspension Toughened Glass Insulators for High Voltage Applications U70bp/146hu100bp/146hu120bp/146h

U70bp-Anti Pollution High Voltage Line Toughened Glass Insulator

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Product Description

Product Information
U70BLP Glass Insulator
  • Model: U70BLP
  • U: Refers To Disc Suspension Insulator
  • 70: Indicates a rated Mechanical failing load of 70kN
  • B: For Ball And Socket Type
  • L: For Long steel feet
  • P: For Anti-Pollution type glass Insulator
  • 280 - Indicates the insulator disc diameter is 280mm (320mm options available).
  • 146 - Indicates the insulator structure height is 146mm.
  • 450 - Indicates the creepage distance is 450mm (550mm options available).
Type: Anti-Pollution Profile Toughened Suspension Type
Rated mechanical load: 70kN (approx. 7 tons)
Purpose: Widely applicable as insulation support for medium and high voltage transmission lines and substation equipment under various climatic conditions.
• Complies with IEC60383-1:1993 and GB/T1001.1 standards.
• Connection structure follows GB/T4056-2008 (IEC60120:1984) and BS 3288 part III.
• Locking pins: W-pin (Standard for U70B) or R-pin available upon request.
Product Technical Drawing
Product Drawing
Technical Parameters
Domestic Designation Unit U70BLP U70BLP1
Mechanical failing load kN 70 70
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) μv 50 50
Corona visual test P/C kV 18/22 18/22
Net weight per unit kg 5.8 9.2
Main Components
Insulator Components
Suspension insulators consist of:
  • Dielectric: Toughened glass with high-grade electrical properties.
  • Cap: Hot-dip galvanized nodular or ductile malleable cast iron.
  • Pin: Hot-dip galvanized forged steel.
  • Assembly: Cap and pin are secured to the glass using high-strength aluminous cement.
A stainless steel or phosphor bronze locking device (split pin) ensures secure coupling. Sacrificial zinc sleeves are available for extra corrosion protection in heavily polluted environments.
Design & Cross-Section
Under long-term electrical stress, contaminants can trigger local arcs. Our design provides sufficient creep distance to disperse electric field strength, reducing local discharge risks and extending product life.
Cross-section Drawing
Product Gallery
Display 1 Display 2
Frequently Asked Questions
1. What does the "70" in U70BLP represent?
The "70" indicates a rated mechanical failing load of 70kN, which is equivalent to approximately 7 tons of tension capacity.
2. Why is toughened glass used for these insulators?
Toughened glass provides excellent dielectric properties and mechanical strength, specifically designed to withstand thermomechanical efforts and various climatic conditions.
3. What are the benefits of the anti-pollution (P) type?
The anti-pollution profile increases the creepage distance (up to 450mm-550mm), which helps disperse electric field strength and prevents local arcs caused by surface contaminants.
4. What type of locking mechanisms are available?
Depending on customer requirements, the locking pin can be either a W-pin or an R-pin. By default, the W-pin is used for the U70B model.
5. How is corrosion prevented on the metal components?
The cast iron caps and forged steel pins are hot-dip galvanized. For high-pollution areas, an additional sacrificial zinc sleeve can be added to the pin.
6. Which international standards do these insulators meet?
They are manufactured in accordance with IEC60383-1, GB/T1001.1, and connection structures comply with IEC60120 and BS 3288 part III.

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