Wholesale Composite Polymer Suspension Type Insulator Electrical High Voltage Pin Insulator

Product Description

1. Insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves.
2. The insulator is also used more specifically to refer to insulating supports used to attach electric power distribution or transmission lines to utility poles and transmission towers. 
3. They support the weight of the suspended wires without allowing the current to flow through the tower to ground.

 

Insulators are characterized in several common classes:
 

Composite suspension insulators
*There are composed of iron caps, porcelain sleeves (suspension or silicone rubber) and steel feet (conductive rods), which are bonded together with cement adhesive.
*All of them adopt the most advanced cylindrical head structure in the world, which is characterized by small head size, light weight, high strength and large creepage distance. It can save metal materials and reduce line costs.

 

Pin insulator 

*The pin-type insulator is mounted on a pin affixed on the cross-arm of the pole. The insulator has a groove near the top just below the crown.
*The conductor passes through this groove and is tied to the insulator with annealed wire of the same material as the conductor.
*Pin-type insulators are used for transmission and distribution of communication signals, and electric power at voltages up to 33 kV. 

 

Post insulator

A type of insulator in the 1930s that is more compact than traditional pin-type insulators and which has rapidly replaced many pin-type insulators on lines up to 69 kV and in some configurations, can be made for operation at up to 115 kV.

 

Suspension insulator

*For voltages greater than 33 kV, it is a usual practice to use suspension type insulators, consisting of a number of glass or porcelain discs connected in series by metal links in the form of a string.
*The conductor is suspended at the bottom end of this string while the top end is secured to the cross-arm of the tower. The number of disc units used depends on the voltage.

Strain insulator

*A dead end or anchor pole or tower is used where a straight section of line ends, or angles off in another direction. 
*These poles must withstand the lateral (horizontal) tension of the long straight section of wire. To support this lateral load, strain insulators are used. 
*For low voltage lines (less than 11 kV), shackle insulators are used as strain insulators. 

CHONGQING ZEXING ELECTRICAL EQUIPMENT CO.,LTD. 
(Short as CZEE)

A leader in innovative transmission equipment and insulators

We are a power equipment company that focuses on the research and development and production of high-quality transmission equipment and insulators. The company is headquartered in Chongqing. Our mission is to provide reliable and efficient solutions to the global power industry through innovation and quality, and to promote the sustainable development of power networks.

Products and Services

The core products of our company include:
*Transmission equipment: We design and manufacture advanced transmission towers, power poles and cable support systems to ensure the stability and safety of power transmission over long distances.
*Insulators: We offer a variety of insulators suitable for power transmission lines and substation equipment of different voltage levels. Our insulators have excellent electrical performance and weather resistance, and can operate stably and long-term under various environmental conditions.

 

 Customized Solutions:
We are committed to providing customized power equipment solutions according to customer needs, including design optimization and engineering support to meet various technical and environmental requirements.
Quality and Commitment
In our company, quality and reliability are the core values of our products. We strictly follow international standards and industry best practices to ensure that all products undergo strict quality control and testing before leaving the factory. Our products not only meet the technical requirements of customers, but also can operate stably for a long time under various extreme conditions to ensure the safety and reliability of the power grid.
Future Outlook
Looking to the future, we will continue to be committed to technological innovation and product optimization, and establish long-term and stable cooperative relationships with global customers. We look forward to becoming a leader in the power industry through our efforts and innovations, and contributing our wisdom and capabilities to building a safer and more efficient power network.
Contact Information
If you are interested in our products and services or have any questions, please feel free to contact our customer service team. We look forward to exploring cooperation opportunities with you and creating a better power future together.

CZEE QUALITY POLICY:
 

1.CZEE products are reliable in operation,
2.CZEE promptly satisfies the customers' requirements and demands,
3.After-sale maintenance and service is executed promptly and considering a high level of technical competence,
4.Long-temm partnership with our customers is the precedence for us,
5.We follow the requirements and pemmanently improve the effectiveness of ISO 9001 Quality Management System.

Our factory consist four branches:

1. Solid Transformer Bushing and Metal Accessories Plant
2. OIP/RIP/RIF/RIS/RIN Condenser Bushing Plant
3. Porcelain/Composite/Glass Insulator Plant
4. Electrical Insulation Materials Plant.
CZEE has already exported to North America, South America, Australia,Southeast Asia, Africa, Europe and 50 other countries and regions.
Insulators manufactured by CZEE correspond to the international standards as referred to their quality and are in the market at the most competitive prices.

For any demands and requirements, please feel free to contact us any time.
Our certificates and full experience of international projects would give you good quality and best support for your projects.
 

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FAQ

Q1: What are the key differences between porcelain, glass, and polymer insulators?
Porcelain insulators offer high mechanical strength and heat resistance, ideal for high-voltage (HV) substations. Glass insulators have excellent self-cleaning properties and easy defect detection, suitable for HV transmission lines. Polymer insulators are lightweight, anti-corrosion, and cost-effective, perfect for coastal or polluted areas.

Q2: How to choose insulators based on an electrical project's voltage level?For low voltage (≤11kV), small-sized polymer or porcelain insulators work. For medium voltage (33kV-110kV), standard porcelain or glass insulators are preferred. For high voltage (220kV-500kV), heavy-duty porcelain or composite polymer insulators with high creepage distance are required.

Q3: What installation mistakes should be avoided with outdoor insulators?
Avoid installing dirty insulators (clean surfaces first to prevent leakage). Do not over-tighten hardware (follow specified torque values to avoid cracking). Ensure proper sealing for polymer insulators to prevent water ingress.

Q4: What is the standard insulation resistance for HV insulators, and how to test it?
The minimum standard insulation resistance for HV insulators is ≥1000MΩ. Test it using a 2500V megohmmeter: connect the meter's leads to the insulator's metal parts and housing, then measure the resistance under dry conditions.

Q5: Which insulator material is best for coastal areas with high salt spray?
Polymer (composite) insulators are best. Their silicone rubber surface resists salt accumulation and chemical corrosion, unlike porcelain or glass which may develop conductive layers from salt, leading to insulation failure.

Q6: Do your insulator products meet international quality standards?
Yes, all our insulators comply with major global standards, including IEC 60383 (for HV insulators), ANSI C29.1 (for porcelain insulators), and IEC 61109 (for polymer insulators), ensuring compatibility with global electrical projects.