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When UPS has no separate bypass mains input, bypass line is also fed from the mains input. Thus, if
such a device is in question, mains input shall be comprehended when the bypass mains input is
referred in the following sections of the manual.
UPS behavior at the start-up is different from the usual operation. The UPS can only operate in
bypass mode during start-up. So, in order for the UPS to start-up, frequency/waveform/rms value
of the bypass mains voltage shall be in acceptable limits and bypass shall be enabled.
After start-up, the following applies:
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