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Advantages of PEXLIM

Silicone-housed surge arrester revolutionize overvoltage protection of power equipment

PEXLIM is very suitable for integration with other switchgear apparatus. Picture shows a compact line entrance module where PEXLIM is installed at structure integrated with capacitive voltage transformer and earthing switch. (Click on the image to view it at higher resolution).

PEXLIM arresters installed directly on the bushings of a power transformer. This type of erection gives short protective distance and eliminates need for foundations or structures. (Click on the image to view it at higher resolution).

In retrofit situations, PEXLIM may be hung directly on conductors near the equipment without regard for location of structures. (Click on the image to view it at higher resolution).

Click on the respective graph to view it at higher resolution.

Silicone rubber - An excellent material

Improved protection
The flexible PEXLIM opens new innovative erection alternatives in old and new applications. Due to its low weight and excellent safety under over-stress conditions PEXLIM may be placed very close to the object to protect resulting in short protective distance. Thus the margins of protection improve dramatically.

Retrofit with PEXLIM prolongs lifetime of high voltage equipment
Protection of margin is a function of - arrester protective level - electrical distance to protected object - insulation withstand of protected object Ageing reduces insulation withstand of equipment and thus the protection margin. Compensate this by PEXLIM with lower protection levels fitted closer to object. This prolongs service life of major equipment at low cost.

PEXLIM limits capital cost when upgrading an existing system
In order to increase the power transfer of an existing system, upgrading the system voltage may be possible under special conditions. By suitable selection and placing of PEXLIM arresters, the existing insulation level of the station equipment and of the power line may be kept, thereby limiting the additional capital cost to a minimum. The principle applies even to high-altitude substations.

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Last edited 2001-11-19