ZSW-10kv, ZSW-20kv, ZSW-35kv Series Post Insulator

ZSW Series Outdoor Rod-Type Post Insulator-High-voltage Substation Insulation Support

Model Description

ZSW series outdoor rod-type post insulator model designation rules are as follows:

Example 1: zsw2-220/16k-3 - indicates outdoor rod-type post insulator, anti-pollution type, design serial number 2, 220kV voltage class, 16kN bending strength, both upper and lower flanges with plain holes, for Class 3 pollution area.

Example 2: ZSI-110/4L - indicates outdoor rod-type post insulator, standard type, design serial number 1, 110kV voltage class, 4kN bending strength, both upper and lower flanges with threaded holes, for Class I pollution area.

Product Overview

ZSW series outdoor solid-core rod-type post insulators are used for insulation and support of live parts in outdoor substations, switchgear, and electrical equipment for power frequency AC voltage 10-500kV.

The insulator porcelain body is of solid construction. The cementing part uses a body sanding structure. The porcelain formulation has excellent performance and has proven to be highly reliable in actual operation. The sand used for sanding is specially processed granulated sand with strict process control, providing good bonding performance with the porcelain body and a suitable coefficient of expansion, effectively improving the mechanical strength of the product. The flange structure is reasonable, with uniform stress distribution under load. The material is high-strength ductile iron with a hot-dip galvanized surface, offering excellent corrosion resistance. The cement used for cementing is high-grade cement, and with a proper curing process, the strength of the porcelain is fully utilized. All voltage class products are single-column type, featuring simple structure, long service life, and low maintenance requirements. To ensure the reliability of the insulators, each product undergoes individual impact testing, ultrasonic inspection, and four-direction bending withstand load testing.

Technical Parameters

ZS Series Post Insulator Technical Parameters (10kV～35kV):

ZSW Series Post Insulator Technical Parameters (35kV～63kV):

High-voltage Post Insulator Technical Parameters (110kV～220kV):

Product Advantages

ZSW post insulators have excellent anti-pollution performance: The anti-pollution capability of post insulators mainly depends on the insulator structure and shed profile. Through design optimization and artificial and natural pollution tests, an insulator shed profile with alternating large and small sheds and ribs under the sheds was finalized. Insulators developed with this shed profile, with rated voltages of 126kV and 252kV, bending failure load not less than 12kN, and specific creepage distance of 25mm/kV, can withstand long-term operating phase voltage under an equivalent salt deposit density of 0.12mg/cm2. Insulators with a rated voltage of 550kV and specific creepage distance of 25mm/kV can operate long-term under an equivalent salt deposit density of 0.06mg/cm2.

The insulators have good low-temperature mechanical properties: After multiple temperature cycle freezing tests, the bending failure strength at -40C shows no significant change compared to room temperature.

The insulators have high mechanical strength, low dispersion, and safe and reliable operation.