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Trayer Switchgear ALTA Series Overhead Distribution Switch Engineered to Withstand Hurricane Conditions

Pole-mounted system includes IP68 control unit and liquid-insulated, motor-operated vacuum switch; mounting system designed for steel-reinforced, concrete poles; system features SCADA interface, battery backup and special features to facilitate safe, loca

SAN FRANCISCO, Jan. 31, 2014 /PRNewswire/ -- Trayer Engineering Corporation, a premier manufacturer of high-performance, distribution switchgear for electric utility and industrial applications, announces the ALTA Series of storm-hardened overhead vacuum switches for medium-voltage distribution systems. Designed for mounting on steel-reinforced, concrete poles, Alta Series switchgear are equipped to withstand Category 5 hurricane strength winds, heavy rain, dust and debris.


The ALTA System is made up of two pole-mounted units: a liquid-insulated, motor-operated vacuum switch and control cabinet designed to meet IP68 standards. The vacuum switch unit is equipped with field-replaceable porcelain bushings with provision for lightning arrestors and visual indication of switch position. The linear actuator can be decoupled from the switch handle to allow for manual operation. The heated control cabinet is designed to remain operational under storm flood conditions. The unit features pendant control access for field operation, battery backup and easy access to SEL relay control panel and SCADA hardware.

According to John Trayer, President and CEO of Trayer Engineering, "The ALTA Series was developed in response to the requirements of a coastal utility that suffered tremendous losses to its distribution equipment due to hurricanes. Our storm-hardened switchgear design and manufacturing techniques were essential elements in producing this remarkable product."

ALTA Series units are offered with 5kV, 15kV and 25kV ratings. All feature Trayer's signature welded 304 stainless steel, storm-hardened construction and SEL relay controls.


Consult factory (custom nature of the product requires individual unit pricing)




12-16 weeks, ARO

About Trayer Engineering

Founded in 1962, Trayer Engineering Corporation is a pioneer in the design and manufacture of maintenance-free vacuum switchgear for electrical distribution systems. Trayer proudly manufactures switchgear of the highest caliber, designed to thrive in the most challenging circumstances. Every submersible, padmount or vaultmount product is backed by 50 years of leading innovation in design and manufacturing. With units operating in the field for over 40 years, Trayer Switchgear's maintenance-free designs offer proven system reliability and low on-going labor costs.

Editorial Contact: 

Media Contact:

Michael Daish, VP Sales & Marketing

Greg Evans, P.E. 

Trayer Engineering Corporation 

WelComm, Inc.



[email protected]  

[email protected]

SOURCE Trayer Engineering Corporation

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