Profile: Trayer Engineering Corporation. is a designer and manufacturer of electrical distribution switchgear products. We are an ISO 9001:2000 certified company. Our product line includes padmount, padmount vacuum switchgear, vacuum fault interrupters, visible disconnects and automation products. We provide replacement for live front air-inisulated switchgear and its design allows for an easy change-out from air-insulated equipment to sealed & dead front switchgear. Our GP visible disconnect is a three-position device that provides a means of creating a visible open and isolation point & grounding cables & this device is available for use in liquid and eliminates the need to lift elbows for cable testing to create a visible open & isolation point to promote safety.