1. How to Choose Insulators?
The polymer insulators
The polymer insulators can be divided into electrical load and electrical performance,
mechanical load and mechanical properties, thermal load and thermal performance
requirements, environmental factors and various loads on the joint effect of the requirements
in all four kinds of insulators. According to the voltage types of AC and DC insulators the
breakdown possibility points can breakdown insulator and not breakdown insulator. Orcelain
and glass insulators for anti aging performance for polymer insulator, the aging rate of the
general requirements in 1/10000 following; fouling resistance than the composite insulator, it
needs each cleaning time, workload is big; the weight ratio of composite insulator in many;
reliability ratio of composite insulator.
The process of insulator
In our case, AC high voltage is 110000 volts and 220000 volts power grid; super high voltage
power system refers to a 330000 volt, 500000 volts and 750000 volts of power grid. Ultra
high voltage power grid refers to the 1000000 volt power system; HVDC means ± 500000 kV
and below DC system, UHV DC to ± 800000 volt DC system. In order to reduce the
transmission process of the electric energy loss, must adopt high voltage power transmission
technology. The power transmission distance, transmission capacity is bigger, need the
higher transmission voltage.
Post insulator
Porcelain and glass insulators, porcelain insulator has no detection problem. Zero detection
is still a problem. Glass insulator will be exploded from two respects looks and the low
suicide rate is advantageous because from a distance without the tower can be found. But
suicide rate is also definitely impossible, and at least it hurts farmer foot. General
requirements of post insulator in the lines on the service life are more than thirty years. Ultra
high voltage (EHV) usually refers to the 330000 kV and above, the voltage below 1000000
volts. Ultra high voltage (UHV) is defined as 1000000 volts and over voltage. High voltage
direct current (HVDC) usually refers to ± 600000 kV and below a DC transmission voltage, ±
600000 volts or more voltage called the ultra high voltage direct current (UHVDC). Good

2. quality can meet the requirement of insulator. Composite insulator on line of life also needs
data collection. Insulator in transmission line number, which belongs to the weak link, the
most inexpensive, about the cost of circuit 2%, is the most important link in transmission line.
Use current input maximum mechanical load strength grade is grade 550kN insulator. With
strength grade of 840kN preparation successful products report.
www.compositeinsulators.net is a professional manufacturer to develop high quality
insulators. Welcome to contact us for detail information about insulators. Our engineering
personnel and technicians are rich in experience of design, development and manufacture of
insulators.
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insulators.htm