Abstract: The uninterrupted electric power supply system of the present system includes: a control means(5); a synchronous machine (1) having an electric motor means (1M) and an alternator means (1A), the electric motor means being arranged to be fed by the network (10), and the electric motor means (1M) being mechanically connected to the alternator means (1A) to provide energy to the alternator means while they receive electric energy from the network (10); a first mechanical energy supply means having an internal combustion engine (2) arranged to provide mechanical energy to the synchronous machine (1) under the control of the control means (5), the internal combustion engine (2) being connected to the synchronous machine by means of first mechanical coupling means (8); a second mechanical energy supply means, connected to the synchronous machine by means of second mechanical coupling means (9) in such a way that they can provide mechanical energy to the synchronous machine (1) under the control of the control means

Abstract: The system ensures electric feed for which purpose it has an alternating current motor (1) coupled to an alternator (2) which is coupled to a hydraulic motor (8) which in turn is coupled to a diesel engine (7.)The alternating current motor is coupled by means of a clutch (6) to a high pressure pump (5.)All the elements are governed by a control circuit (4) so that in the absence of network, it simultaneously drives the diesel engine (7) and the hydraulic motor (8) the latter initially maintaining the angular speed of the alternator, until the diesel engine (7) attains its normal working conditions; as of when it is mechanically coupled to the alternator (2), the hydraulic motor (8) remaining turned off.The high pressure pump is capable of being directly coupled to the diesel engine (7) with which the hydraulic motor (8) is the one which maintains the angular speed of the alternator (2) at all times.