IEC Standard Porcelain Hollow Insulators
IEC Standard Porcelain Hollow Insulators

IEC Standard Porcelain Hollow Insulators

porcelain hollow insulators are used in: current transformers voltage transformers capacitive voltage transformers circuit breakers – sf6 & non-sf6 surge (lightning) arresters. power transformer bushings wall through bushings
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hollow porcelain insulators are basically used as weather shields that protect the internal components from being exposed to the vagaries of the weather. they are used in：

  • current transformers
  • voltage transformers
  • capacitive voltage transformers
  • circuit breakers – sf6 & non-sf6
  • surge (lightning) arresters.
  • power transformer bushings
  • wall through bushings

these insulators being of hollow construction are subjected to an internal hoop (pressure) stress in addition to the mechanical bending stress. this necessitates expertise in the design, manufacture & testing of these insulators.

the hollow porcelain insulators are manufactured using high strength aluminous porcelain and subjected to strict process and dimensional controls. the drying and firing process are suited to ensure proper and complete vitrification of the shells. the shells are then cut & ground to the specific requirements. the chamfer of the internal and external diameter plays a critical role in the mechanical performance of the hollow porcelain insulators and hence particular care is taken to ensure proper chamfering of the ends. the surface finish is another such critical factor that prevents gas / oil leakage and hence is critically controlled.

all the shells are subjected to ultrasonic test prior to assembly. the insulators are then assembled with the metal parts as required using portland cement with the aid of precision assembly fixtures. the cement is cured under conditions of temperature and humidity.

they are then subjected to routine and conformance tests in line with customer requirements, iec standards as required.

Hollow insulators specification

voltage rating from 33kv up to 800 kv
mechanical rating from 02kn to 50kn
height up to 2800mm in single part and up to 4500mm with epoxy joints
id min 65mm to max 450mm
od min 125mm to max 600mm
specific creepage distance from 12mm/kv to 35mm/kv
Company profile

Who We Are?

Nooa Electric Co., Ltd. - Chinese professional electrical insulators manufacturer with 21+ experience, covering an area of 70,000 square meters, and construction area is 50,000 square meters. There are more than 200 employees, including 25 technicians. The production capacity 3500000 pieces per year, and now setting up the new kiln and lines up to 10500000 pieces per year. We have been specialized in research and development of latest high-strength functional glass and power transmission insulators, which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China, and is a participating unit of product standard formulation of the national electrical insulator standard committee.


What We Have?

Certificates & Reports: INTERTK, SGS, BV Certificates,Type Test Certificate.

Main Electric Insulators : Standard-type glass insulator (u40(ctv175)/u70(ctv254, ps70e)/u120/u160/u210/u300) , antipollution-type glass insulators (u120bp/u160bsp/u210bp), aerodynamic type glass electrical insulators (ug70bsa/u100bsa/u120bla), multi-umbrella type electric insulators, ground-wires type glass power line insulators (u70cn/u100cn/u120c), post insulator for line, pin glass insulator. Products are mainly used for transmission line insulation, suspension, support, tension conductors. They are divided into 5 major series: The standard type glass insulator 40-550kn, filth-resistant type glass insulators 70-420kn, aerodynamic type glass electrical insulators 120-300kn, multi-umbrella type electric insulators 120-300kn, and ground circuit type high voltage insulators, able to be used for line voltage from 10kv～1000kv.


Core Technology:

Automation Equipment: Siemens fully automatic feeding, stamping, temperature equalization, tempering, hot and cold shock control system.
Independent Product Model: U160BP/146/380/450, U160BP/155/380/450, U210BP/170/420/550 and U300BP/195/420/550.
Advanced Klin: Germany's new generation kiln control system, equipped with brand-new sensors and actuators, and equipped with a high-precision automatic batching system.
Qualification: Passed the quality, environment and occupational health system certification and obtained a number of invention patents.


Goal:

To be the world's largest glass insulators manufacturer.

Electric Insulators Certificates

Are u the electric insulators factory or trading company?
China Leading Electric Insulators Factory founded in 2002
What're your main power insulators?
Powerline Electric Insulators (glass insulators, porcelain insulators, composite insulators ), the fittings and hardwares of all kinds for high-voltage applications and related products.
Can I get some glass insulators samples?
Yes, powerline glass insulator sample order is available for quality check and market test.
What's your payment terms?
We usually accept all kinds of payment terms, T/T, L/C, Western Union.
How can you control your glass power line insulator quality?
For each glass insulator production processing, we have a complete QC system for the chemical composition, physical and electrical properties. After production, all glass power line insulators will be tested according to related standards, and the ex-factory test reports will be sent along with shipment documents.
Does your company accept customization?
We accept OEM service.
What's your warranty terms?
We offer 24 months warranty terms.
Do you have glass electrical insulators in stock?
Depends on your request, we have standard models (CTV254 & CTV175, U40B U70B U120B U160BL U240B U300B ) in stock. Some special product and big order will be newly produced according to your order.

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Contact Us

Room 2221, 22nd Floor, Building 1, Wanxiang Times Garden, No. 676, Renmin East Road, Furong District, Changsha City, Hunan Province, China
Phone : 0086 186-848-89358
Whatsapp : +8615274981317  
Email : info@nooaelectric.com
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