Abstract: A circuit for protecting the ac generator and/or load of a diesel-engine generator set is provided. Included is a circuit for measuring indications of the current in each phase of the ac generator, and a switching circuit for protecting the ac generator if the current in any phase is greater than a predetermined current for a predetermined length of time (overcurrent), or if the current in any phase is less than a predetermined function of the currents in each of the phases for the predetermined length of time (imbalance). The circuit which protects the ac generator preferably short circuits the field winding of the ac generator and thereby turns off the ac generator, and/or closes a fuel valve to effectively turn off the engine should the current imbalance or overcurrent be sensed. In conjunction with the protection circuit, a switch interlock and/or circuit breaker arrangement for shock protection is provided.

Abstract: A circuit for protecting the ac generator and/or load of a diesel-engine generator set is provided. Included is a circuit for measuring indications of the current in each phase of the ac generator, and a switching circuit for protecting the ac generator if the current in any phase is greater than a predetermined current for a predetermined length of time, or if the current in any phase is less than a predetermined function of the currents in each of the phases for the predetermined length of time. For diesel-engine generator sets which generate three phase 460 V at up to thirty amperes continuously, the preferred predetermined overcurrent for any phase of the ac generator is thirty-five amperes, and the predetermined length of time (to permit inrush currents) is five seconds. Preferably the current in any phase should be less than fifty percent of the average of the current in the three phases.

Abstract: A multi-tank fuel storage system is provided for a generator unit which can be mounted to a container in a clip-on fashion and/or mouned to a chassis supporting the container in an underslung fashion. The preferred multi-tank fuel storage system includes: a first fuel storage tank built into the generator unit housing; a separate auxiliary fuel storage tank; a feed line and pump coupling the tanks for transferring fuel from the auxiliary tank to the first fuel storage tank; an overflow line coupling the tanks for transferring overflow from the first fuel storage tank to the auxiliary fuel storage tank; and conduits for coupling the first fuel storage tank to the engine of the generator unit. Quick disconnect couplings are placed in the feed line and the overflow line so that the auxiliary tank can be uncoupled from the system.

Abstract: A housing for a generator unit which is for mounting on a freight container unit is provided where the identical housing may be mounted on the container on a clip-on fashion or on a chassis supporting the container in an underslung fashion.