Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson

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Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson Detail:

High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL (9)

IEC designation U70B/146 U70B/127
Diameter D mm 255 255
Height H mm 146 127
Creepage distance L mm 320 320
Socket coupling mm 16 16
Mechanical failing load kn 70 70
Mechanical routine test kn 35 35
Wet power frequency withstand voltage kv 40 40
Dry lightning impulse withstand voltage kv 100 100
Impulse puncture voltage P.U 2.8 2.8
Power frequency puncture voltage kv 130 130
Radio influence voltage μv 50 50
Corona visual test kv 18/22 18/22
Power frequency electric arc voltage ka 0.12s/20kA 0.12s/20kA
Net weight per unit kg 3.6 3.5

Installation and maintenance

3 Installation 3.1 Appearance Check
The insulators shall be inspected one by one according to chapter 28 of GB/ T1001.1-2003 and this standard before installation, and the use of insulators that do not meet the above requirements shall be prohibited.
3.2 Insulator resistance measurement
Insulation resistance of porcelain insulators shall be measured one by one before installation. Insulators that do not meet the requirements of DLT626 shall not be used.
3.3 Precautions
During installation, insulators should be handled with care, not thrown, and avoid collision and friction with sharp objects.
4 Operation and Maintenance
4.1 document
The operating unit shall establish insulator files in accordance with DL/T 626.
4.2 maintenance
During inspection and inspection of insulators, if it is found that the lock pin is missing or the insulator has zero value, live operation or power failure repair shall be adopted, and the insulators shall be inspected in time according to the following provisions.
If one of the following conditions occurs, the insulator can be determined to be invalid. A) Cracks and yellow rust spots appear on the iron cap (acid reflux); B) Bending and cracking of steel feet; C) Severe arc burning of iron cap and steel foot;
D) iron cap, insulation and steel foot are not on the same axis: e) porcelain cracks occur;
F) Insulation parts are seriously burned by partial discharge and partial shedding occurs; G) Cracks or skew appear in the cement at the steel foot;
H) Corrosion of steel feet occurs as described in DLT626-2005.

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Product detail pictures:

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures

Manufactur standard U120b Glass Insulator - High Voltage 70kn Disc Suspension Toughened Glass Insulator U70BL – Johnson detail pictures


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  • The customer service reprersentative explained very detailed, service attitude is very good, reply is very timely and comprehensive, a happy communication! We hope to have a opportunity to cooperate.
    5 Stars By Marguerite from Angola - 2017.09.09 10:18
    A good manufacturers, we have cooperated twice, good quality and good service attitude.
    5 Stars By Wendy from Congo - 2017.06.19 13:51

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