1. Start with your buyer constraints

Before you compare products, write down:

• System voltage of the line or distribution network
• Mechanical demands: the tension and bending loads the insulator must carry
• Environment: pollution, humidity, coastal salt or industrial dust at the site
• Structure constraints: the space available on the pole or crossarm, and whether you need a compact line layout
• Compliance requirements: the standards and test reports your utility or project specification calls for

These constraints decide whether a needle-type composite insulator applies at all.

2. Key specifications of the Composite Needle-Type Insulator

The supplier's product page lists these parameters for the series:

The values above are maximums or ranges across the series. They are not the values of any single model. Ask for the datasheet of the exact model you plan to order and check each figure against your design requirements. The published dry withstand and impulse withstand ranges in particular should be confirmed model by model.

Full product details are on the Composite Needle-Type Insulator product page.

3. Selection criteria to compare

Voltage fit

The needle-type series is described for medium- and high-voltage distribution systems, with a rated voltage of 10–36 kV. If your system voltage is outside this range, this product does not apply.

Creepage (leakage) and arc distance

The supplier says the needle-type shed design increases creepage distance, so that operation stays stable in polluted, humid or saline conditions. For sites with heavy pollution or coastal exposure, check that the leakage distance of your chosen model meets the creepage requirement in your project specification. The series maximum is 1190 mm.

Mechanical load

The series lists a maximum tension load of 20 kN and a maximum bending load of 12.5 kN. Compare these figures, including your safety margins, with the conductor loads, wind loads and ice loads in your design.

Materials and surface behaviour

The insulator combines a fiberglass reinforced epoxy resin core for mechanical support with a hydrophobic silicone rubber housing. According to the supplier, the silicone surface stops continuous water films from forming, which reduces leakage current in rain or fog.

Manufacturing process and stated standards

The supplier states that it uses integrated injection molding and crimping technology, and that the product meets GB/T 19519 and IEC 61109. Buyers who need proof should ask for the relevant type test and routine test reports instead of relying on the product page.

Compactness

The supplier describes the needle-type geometry as suited to compact line structures. Check that the structure height of your chosen model (the series maximum is 530 mm for LP4-36/12.5) fits your hardware layout.

4. When this recommendation does not apply

The needle-type insulator is not the right choice when:

• The system voltage is above 36 kV
• The required tension load is above 20 kN, or the bending load is above 12.5 kN
• The application is suspension of conductors on high-voltage transmission towers rather than support on distribution structures

For transmission lines, the same supplier publishes a Composite Suspension Insulator range (FXBW series). Its listed models run from 15 kV to 220 kV rated voltage, with tension loads of 70 kN, 100 kN or 160 kN depending on the model. That product works differently: the fiberglass core carries the tension of the suspended conductor. It should be assessed against its own model table.

5. Questions to ask the supplier

The product page mentions technical support for selection, custom engineering for special environmental or mechanical requirements, and stock of common models such as the LP4 and FPW series. Confirm these points in writing for your order:

1. The exact model and its full datasheet
2. Test reports for the standards your project requires
3. Current availability and delivery schedule
4. Fitting and hardware compatibility with your structures
5. Packaging and documentation needs for your destination market

Summary

For 10–36 kV distribution lines that need compact structures and good pollution performance, the Composite Needle-Type Insulator is worth evaluating. For higher voltages or heavier tension loads, look at suspension-type composite insulators instead.