Eaton 93PR Series - Figure 2-6: Route of the Electric Energy Running through the UPS in ESS Mode

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Eaton 93PR 15-80 kW UPS

Installation and Operation Manual

Energy Saver System Mode

In ESS mode, the UPS supplies safe bus current to the load. ESS mode requires AC power that

is within an acceptable voltage and frequency range. On the display, the state of the UPS is

shown as “ESS Mode”, and the UPS is in “In Service” state. In ESS mode, the surge suppression

and ltering ensures pure electric energy for the load equipment. When any disturbance of input

power supply is detected, the UPS will switch to Online mode and continue to supply power to the

load via the inverter. If the input AC power fails or exceeds the system specications, the UPS will

switch to battery mode automatically to supply uninterrupted power to the load.

In ESS mode, the UPS constantly monitors the quality of power supply using a detection and

control algorithm, so as to meet the needs of quick mode switching. The UPS is usually capable

of switching to Online mode accurately in less than 2ms.

When the input power supply is within an acceptable range, the UPS works in a high-efciency

energy saving mode - protecting the equipment and supplying pure power to the equipment.

Within 20–100% of the rated load, the system efciency is as high as 99% in ESS mode.

Internal relay contacts

Figure 2-6: Route of the electric energy running through the UPS in ESS mode

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