Consulting Specifying Engineer June 2015-CSE : Page 67

ADVER TISEMENT Medium-Voltage Circuit Breaker Automatic Transfer Switches For closed-transition retransfers, the switch first checks to ensure that the normal source is in synchronism with the emergency source, parallels the two sources by closing the normal source breaker, and finally opens the emergency source breaker. Russelectric can configure Medium-Voltage Circuit Breaker Switchgear to provide bypass and isolation of the automatic transfer switch. This configuration provides all the functions of an ATS plus the ability to manually bypass power from live source to load if the transfer switch becomes disabled. Russelectric Medium-Voltage (5-15kV) Circuit Breaker Automatic Transfer Switch Russelectric’s new Medium-Voltage (5-15kV) Circuit Breaker Automatic Transfer Switches are fully UL tested, listed, and labeled under UL 1008A, making them suitable for use in legally required emergency power systems. Through the carefully controlled opening and closing of circuit breakers, these switches transfer electrical loads from a normal power source to an emergency source upon reduction/ loss of voltage and retransfer loads when normal power is restored. Switches may be configured for open-or closed-transition transfer. All models meet or exceed stringent UL, IEEE, NEMA, and ANSI standards. All functions of these ATS are controlled by Russelectric’s powerful, versatile RPTCS programmable microprocessor-based control system. For both the open-and closed-transition configurations, if the normal source is lost, the control initiates an open-transition transfer to the emergency source by tripping the normal source breaker and then closing the emergency source breaker. For open-transition retransfers, the switch first verifies that the normal source has returned, opens the emergency source breaker, and then closes the normal source breaker. Russelectric’s powerful new RPTCS programmable microprocessor-based ATS control system The switchgear is designed to allow isolation and de-energization of the automatic transfer breakers for maintenance, testing, and repair. Operators can easily choose between load-break bypass and no-load-break bypass by means of a selector switch. Russelectric equipment is backed 24/7/365 by factory-direct employee field service. Tel: 1-800-225-5250 | E-mail: | input #45 at


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