HUMP AC ELECTRIC DRIVE CONTROL DEVICE Russian patent published in 2008 - IPC B61L7/08 

FIELD: railway transport; signaling and communication.

SUBSTANCE: invention can be used to control drive with ac three-phase induction motor. Proposed device to control hump ac electric drive contains phase control device with three inputs and five outputs one of which is connected with starting relay, reversing and noncontact switching elements. Reversing element is made in form of relay, and noncontact switching element, in form of optoelectric switch. Device includes automatic reset relay, electric drive friction control device with indicator, device to detect breakdown of optoelectronic with its condition monitor and indicator, diagnosing relay, auxiliary relay, point position control device. Phase control device is provided with working circuit break indicator.

EFFECT: improved reliability and safety of hump electric drive control devices.

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