Patent ID: 8380256
Filing Date: 2013-02-19
Classification: H02H,H04W

Abstract:
1. A failsafe protection system for a distributed telecommunications site, the distributed telecommunications site including a base transceiver station for enabling wireless communication with a plurality of portable communication devices and a network interface unit (NIC) for connecting the base transceiver station to a telecommunications network backbone, the system comprising: a DC bus; an electrical power supplying device coupled to the DC bus; a low voltage disconnect coupled to the DC bus; a first circuit pathway coupling electronics of the base transceiver station to the DC bus via a low voltage disconnect, wherein the low voltage disconnect selectively controls coupling between the base-transceiver-system electronics and the DC bus as a function of voltage realized at the DC bus, and wherein the low voltage disconnect decouples the base-transceiver-system electronics from the DC bus upon sensing a magnitude of the voltage realized by the DC bus is below a predetermined value; a conductive pathway coupled at a first end to the DC bus and coupled at a second end to a portion of the first circuit pathway located between the low voltage disconnect and the base-transceiver-system electronics, wherein an energizing coil is formed on the conductive pathway between the first end and the second end; a second circuit pathway coupling the NIC to the DC bus, wherein the second circuit pathway includes a relay formed in series between the NIC and the DC bus, and wherein the relay is configured to sense a voltage condition across the energizing coil within the conductive pathway and to open the second circuit pathway upon the energizing coil becoming energized in response to the low voltage disconnect decoupling the base-transceiver-system electronics from the DC bus within the first circuit pathway, and wherein, when the relay opens the second circuit pathway, electrical current flow to the (NIC) from the DC bus is prevented.