Products

Polymer Surge Arresters



Polymer

Solid Core-Design

The modular design makes it possible to produce high-voltage arresters with a variable length and creepage path as well as a flashover distance in accordance with the customer’s requirements without any problems and in a cost-effective way. This arrester distinguishes itself by its extremely low weight, so that the installation costs can be further reduced. Polymer arresters in solid core design are ideally used as line arresters. In connection with a disconnector, these arresters satisfy the requirements of the power supply and plant construction industry as far as line arresters are concerned.
The Trade mark VARISIL is a solid core design arrester which we manufacture under TRIDELTA brand in France since 2009.
 

Tube design

Like porcelain arresters, these plastic arresters are equipped with a hollow insulator as the housing. The insulator consists of a fiber-reinforced tube to which the silicone umbrellas have been fixed by spraying. Composite insulators distinguish themselves by an extremely high mechanical strength and the remaining stability after the breakdown of an arrester. 75 % of the mechanical stability are retained. It is for these reasons that this type of arrester is ideal for applications at highest voltage levels as well as in areas prone to earthquakes.
 
Cage design

The recent TRIDELTA development form is a silicone injection moulded surge arrester of cage design. Fibre-glass reinforced epoxy resin bars are fixed in the terminals by a patented process and enclose the ZnO blocks. This cage-like structure gives the active component high mechanical strength. Full encapsulation of the "cage" with silicone prevents the entry of moisture and ensures high reliability. 
Cage design arresters can be installed in standing or suspended position in transformer substations and as line-side arresters in overhead power lines. High processing quality on latest machines and testing with most advanced tools ensure long life of the arresters.


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