120KN 160KN Toughed Disc Tension Glass Insulator

• Customization: Available
• Application: High-voltage
• Structure: Suspension Insulator
• Model NO.: IEC Standard
• Type: A Type Insulator
• Usage: High Voltage Power Transmission, Insulation, Electrical Installation
• Connection Method: Trough Type
• Size of Bearing Capacity: 120KN
• Certification: CE, ISO9001
• Brand: NJREC or OEM
• Unit Spacing(H): 146/170mm
• Nominal Diameter(D): 280mm
• Creepage Distance: 450mm
• M&E Strength(kN): 120mm
• Delivery time: 30 days
• Warranty: 1 year
• Shipment: Sea
• Transport Package: Wooden Package
• Trademark: NJREC
• Origin: China
• HS Code: 8546100000

Product Description

Glass insulators are critical components in power systems, used for supporting, insulating, and securing conductors. They are primarily made of tempered glass and widely applied in transmission lines, substations, and electrified railways. 

1. Structure and Composition of Glass Insulators

 

• Tempered Glass Sheds:

  • The main body, heat-treated for high strength and insulation.

  • The shed design increases creepage distance, preventing pollution and rain flashovers.

• Metal Fittings (Cap & Pin):

  • Usually made of galvanized steel or aluminum, connecting conductors to towers.

  • Cemented or crimped to ensure mechanical strength.

• Sealing Material (e.g., Silicone Rubber):

  • Prevents moisture ingress, enhancing weather resistance.
    
     

    2. Key Characteristics of Glass Insulators

     

    (1) Electrical Performance

  • High Insulation Strength: Breakdown voltage exceeds 100 kV, suitable for high-voltage transmission (10 kV-1000 kV).

  • Arc Resistance: The smooth surface resists carbonization, maintaining insulation over time.

  • Self-Cleaning Property: The glass surface repels contaminants, reducing pollution-induced flashovers.
    
    (2) Mechanical Performance

  • High Strength: Tempered glass withstands conductor tension, wind loads, and other stresses.

  • Zero-Value Self-Breaking: If degraded (e.g., internal cracks), the insulator shatters ("self-explodes"), simplifying maintenance.
     

  • (3) Environmental Adaptability

  • Weather Resistance: Resists UV rays, extreme temperatures (-40°C to +80°C), and corrosion.

  • Anti Pollution: Optimized shed design suits coastal and industrial areas.
    
    3. Types of Glass Insulators
     

  • By Voltage Class

• Low Voltage (≤1 kV)

• Medium Voltage (1 kV-35 kV)

• High Voltage (110 kV-500 kV)

• Ultra-High Voltage (≥750 kV)
   

  4. Advantages

• Self-Breaking: Simplifies maintenance.

• Long Lifespan: 30-50 years.

• Pollution Resistance: Ideal for industrial/coastal areas.
  
  5. Sepcifications of some types
  
  For more inforamtions, such as the technical drawings and other types of glass insulator, please feel free to contact us.

  Type	Spacing(mm)	Diameter (mm)	Creepage Distance(mm)	Coupling	Mechanical Faiing Load(kN)
  U40B	110	175	190	11	40
  U70BS	127	255	320	16	70
  U70BL	146	255	320	16	70
  U100BS	127	255	320	16	100
  U100BL	146	255	320	16	100
  U120B	146	255	320	16	120
  U120BS	127	255	320	16	120
  U160BL	170	280	400	20	160
  U160BS	146	280	400	20	160
  U210B	170	280	400	20	210
  U240B	170	280	400	24	240
  U300B	195	330	490	24	300
  U400B	205	360	550	28	420
  U550B	240	380	620	32	550
  U70BLP	146	280	450	16	70
  U100BLP	146	280	450	16	100
  U120BP	146	280	450	16	120
  U160BLP	170	320	550	20	160
  U160BMP	155	320	550	20	160
  U160BSP	146	320	550	20	160
  U210BP	170	320	550	20	210
  U240BP	170	320	550	24	240
  U300BP	195	380	690	24	300
  U420BP	205	380	620	28	420
  U550BP	240	390	710	32	550

Nanjing Rainbow Electric Co.,Ltd is devoted to be a leading manufacturer and exporter of electric industry in China since established. And has a complete supply chain and production line. Each production process is strictly controlled to ensure that the products delivered to the customers are completely flawless.

FAQ

 

Q1. What's the payment term ?

A. T/T and L/C is acceptable and TT will be more appreciated. 30% deposit, 70% balance against B/Lcopy.
Or 100% irrevocable LC at sight

Q2. How to buy your ideal products?

A. You can provide us with your drawings with specifications, we will produce as per your drawing.
Or we can design as your requirements if you do not have a clear plan.

Q3. What is your Packing/Package ?

A. Standard export packing or Customized packing as your request.

Q4. Would you accept to use our logo ?

A. OEMODM can be acceptable.

Q5. What kind of certificate you have ?

A. Our company already achieve lSO9001 certificates and we have test reports.

Q6. What else can l do for you?
A. Our salesmen will reply your inquiry within 24 hours. We can give you any support on the technique &other aspects.