Uninterruptible power supply systems

DC switchgear can be combined with charging and rectifying unit in one cabinet. AC switchgear can be combined with voltage source inverter in one cabinet. Power can be supplied from one or two inputs.

In case of one input, if voltage at the input is available, power is transferred either via double conversion channel or via bypass channel from input to output. When input voltage is disconnected, load continues to be supplied from accumulator battery and voltage source inverter. As a rule, accumulator battery capacity is selected at the rate of two-hour load power supply.

In case of two inputs, consumers are supplied from input with voltage. Only in case of no voltage on both inputs, load is supplied from accumulator battery and voltage source inverter.

Voltage source inverter with sinus filter provides load power supply with sinusoidal power-frequency voltage with the lowest form deviation.

The system controls voltage value at input and its frequency, and in case of their overranging load power supply is switched from voltage source inverter.

Microprocessor control system with display provides optimum control, regulation and all system units protection modes, as well as flexible operation modes configuration, current operation diagnostics and monitoring.