SCHWEITZER 3 PHASE WYE UNDERVOLTAGE SENSOR NEW NOS RARE $189 WE HAVE 9 MORE IN STOCK.. THEY ARE A SMALLER SIZE.. LET ME KNOW WHAT YOU NEED.. INFO FROM THE INTERNET!! FYI.. VS ? Voltage SENSOR Voltage Sensors (VSs) are available for Wye...allow you to match your system configuration. SEL custom builds each Voltage Sensor as a complete custom solution for your application. Voltage Sensors monitor primary system voltage on main and alternate sources in pad-mounted automatic transfer schemes and control contact status. The VS is installed on the test point of a separable connector and indicates the presence of system voltage by an electrically isolated contact. A three-phase voltage sensor's contact latches closed when system voltage on all three phases is above 90 percent, and opens when system voltage on any phase drops below 75 percent (a Delta-configured sensor requires drop in two or more phases for the sensor latch to open). SEL Voltage Sensors are built tough for dependable operation in harsh environments and are economical in eliminating the need for potential transformers or analog sensors. Together, we can build a custom solution for your application needs. Three-phase voltage sensors detect primary system voltage on main and alternate sources in pad-mounted automatic transfer schemes. Voltage sensors detect voltage via the test point of the separable connector component. The presence of system voltage is indicated by an electrically isolated contact. Schweitzer Engineering Laboratories makes and calibrates each voltage sensor as a complete custom solution for each application. Sensor circuitry monitors primary system voltage and controls contact status. Wye and ungrounded Delta models allow you to match your system configuration. Contacts latch closed when system voltage on three phases is above 90 percent. Contacts latch open when system voltage on any phase drops below 75 percent. Delta units require voltage drop in two or more phases. Yaba1957 is an asset recovery wholesaler specializing in new and used surplus industrial equipment. We are not a representative of any manufacturer listed; all names, logos, descriptions and other related information are trademarks of their respected companies or manufacturers. All items listed are identified as either new or used and the new may be older surplus. We list all items to the best of our ability and aim to provide the customer with as much information as possible. Yaba1957 is not liable for any products sold, the customer is responsible for proper testing, installation and use of equipment purchased. M No warranties are expressed or implied.The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.