Wholesale U70bla 70kN 220kv Open Air Aerodynamic Disc Glass Insulator for High Voltag Manufacturers, Factory

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Wholesale U70bla 70kN 220kv Open Air Aerodynamic Disc Glass Insulator for High Voltag Manufacturers, Factory

70kN U70A Aerodynamic Type Glass Insulator IEC Standards for High Voltage Lines

Aerodynamic Toughened Glass Insulator U100bsa for High Voltage Transmission

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Product Description

Product Information

Model: U70BSA / U70BLA
U: Refers To Disc Suspension Insulator
70: Indicates a rated Mechanical failing load of 70kN
B: For Ball And Socket Type
S: Stands For Short Steel Foot
L: Stands For Long Steel Foot
A: Aerodynamic design

127/146: Indicates that the height of the insulator structure is 127mm or 146mm.
380: Indicates that the diameter of the insulator disc is 380mm.
365: Indicates that the creepage distance of the insulator is 365mm.

Type: Open profile Toughened Suspension Type
Rated mechanical load: 70kn (about 7 tons)
Purpose: Aerodynamic glass insulators are primarily used in high-voltage transmission lines. Their design resists strong winds, reduces vibration, prevents ice buildup, and enhances self-cleaning capabilities. Ideal for harsh weather conditions (windy or frigid regions).

Compliance: IEC60383-1:1993, MOD / GB/T1001.1
Connection: GB/T4056-2008 (IEC60120:1984, MOD) and BS 3288 part III.
Locking pin: W-pin or R-pin available per customer requirements (W-pin is standard for U70BA).

Product Drawing

Product Parameters

IEC Designation	Mechanical Failing Load (kN)	Nominal Diameter D (mm)	Nominal Spacing P (mm)	Creepage Distance L (mm)	Socket Coupling (mm)	Wet Power Freq. Voltage (kV)	Dry Impulse Voltage (kV)	Puncture Voltage (kV)	Net Weight (kg)
U70BSA	70	380	127	365	16	45	90	130	5.2
U70BLA	70	380	146	365	16	45	90	130	5.3
U100BSA	100	380	127	365	16	45	90	130	5.2
U100BLA	100	380	146	365	16	45	90	130	5.3
U120BSA	120	380	127	365	16	45	90	130	5.2
U120BLA	120	380	146	365	16	45	90	130	5.3
U160BSA	160	420	146	380	20	50	95	130	7.2
U160BMA	160	420	155	380	20	50	95	130	7.3
U210AD	210	420	170	380	20	50	95	130	7.3
U240AD	240	420	170	380	20/24	50	95	130	7.5
U300AD	300	420	195	465	28	50	95	130	12

Electrical Performance:

Power frequency electric arc voltage: 0.12s/20ka
Impulse puncture voltage: 2.8 P.U
Corona visual test: 18P/22C kV
Radio interference voltage (10kV 1MHz): 50μv

Suspension Insulator Components

Suspension insulators consist of the following elements:

Dielectric: Made of toughened glass with optimized shape for environmental resilience.
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.
Locking Device: Stainless steel or phosphor bronze split pin ensures secure unit coupling.
Optional Protection: Anti-corrosion zinc sleeves (sacrificial anodes) for pins are recommended for high-pollution environments.

Detailed Photos

Frequently Asked Questions (FAQ)

1. What are the benefits of the aerodynamic design in glass insulators? The aerodynamic design is specifically engineered to resist strong winds, reduce vibration, and prevent the buildup of ice. Additionally, it enhances self-cleaning properties, making it ideal for harsh or polluted environments.

2. What standards do these toughened suspension insulators comply with? Our products comply with international standards including IEC60383-1, GB/T1001.1 for models, and GB/T4056-2008 (IEC60120) and BS 3288 part III for connection structures.

3. What is the difference between U70BSA and U70BLA models? The primary difference lies in the nominal spacing (height). The U70BSA has a spacing of 127mm (short foot), while the U70BLA features a spacing of 146mm (long foot).

4. What materials are used for the locking devices? The insulators use stainless steel or phosphor bronze locking pins (W-pin or R-pin) to ensure a secure and durable coupling between units.

5. Are these insulators suitable for high-pollution coastal areas? Yes, especially when equipped with the optional anti-corrosion zinc sleeve (sacrificial anode) on the pins, which provides extra protection against heavy pollution and corrosion.

6. What is the mechanical failing load of the U70 series? The U70 series has a rated mechanical failing load of 70kN, which is approximately equivalent to 7 tons of tension.