The Dependable Power Systems' Inverter is a solid-state, double conversion unit that provides continuous, clean, regulated sine wave power to sensitive electronic equipment.
The inverter system consists of three major components; the inverter, the static switch, and the manual (maintenance) bypass switch. During normal operation, the inverter changes the DC power to clean, regulated, sine wave power which is supplied through the static switch and the manual bypass switch to the critical load.
Should there be a loss of utility power, the inverter draws the DC power from the batteries without switching to continue providing AC power. An alarm will sound to alert operating personnel of that the battery is discharging allowing for an orderly shutdown of the critical load. A second alarm will sound when the batteries are near exhaustion, warning that shutdown is imminent. After the batteries are discharged, the Inverter shuts itself off.
The static switch is a make-before-break electronic switch which transfers the critical load to the bypass or alternate power source without interruption should the Inverter experience a failure or if an overload should occur. If the transfer is due to an overload, the static switch automatically retransfers the critical load back to the inverter after the overload condition ends.
The manual (maintenance) bypass switch, hereon called MBS, is a manually operated makebefore- break switch. When maintenance is to be performed on the Inverter, while still supplying power to the critical load, the MBS is placed in the "LOAD ON BYPASS" position. This transfers the load to the bypass AC power source without interruption, allowing all power to be shut down in the Inverter. CAUTION: THE STATIC SWITCH MUST BE IN THE "LOAD ON BYPASS" POSITION BEFORE THE MBS IS THROWN. Switching the MBS to the TEST position allows the static switch to be tested while maintaining the load safely on bypass source.