Section 70(5)(b) in The Bangalore Metro Railway (General) Rules, 2011
(b)The Emergency Trip System switches are installed at each end of platform in stations, at station control rooms and at cross passages in tunnels. After activating an Emergency Trip System an individual signal is sent to Supervisory Control and Data Acquisition system, and according to a tripping scheme and logic provided, the Supervisory Control and Data Acquisition system shall switch off relevant DC circuit breakers and send signals to indicate that the track section is de-energized.