Ac Mains Connections; Ac Mains Considerations - Keysight Technologies RP7900 Serie Guide D'utilisation Et De Maintenance

2 Installing the Instrument

AC Mains Connections

AC Mains Considerations

Delta and Wye Type AC Distribution Considerations
Surge Protector Installation
Power Cable Connections
AC Mains Considerations
Keysight RPS models have a fully bi-directional three-phase AC input converter, which allows for
seamless bi-directional power flow between the AC mains and DC output terminals. In a standard
power supply, energy only flows from the AC to the DC output terminals. In a regenerative power
supply, energy also flows from the DC output terminals back to the AC mains whenever the unit is
sinking current, either from rapid downprogramming of the output or from discharging an energy
source such as a battery. This return of energy back to the AC mains is called regenerative operation.
The AC input converter of the RPS unit employs firmware algorithms to maintain high power factor and
low total harmonic distortion across a wide range of operating conditions. For more information, refer
to the AC input portion under
and the Limiting Sinusoidal Outputs
Follow all wiring instructions for the power cord provided in this section of the manual.
Exceeding the AC input voltage rating or mis-wiring the line connection can create
permanent damage in the following devices.
The following components are used to provide immunity against line-to-line transients as high as 1 kV,
and line-to-ground transients as high as 2 kV:
600 Vrms voltage limit devices are installed on 400 VAC units, between line-to-line connections.
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300 Vrms voltage limit devices are installed on 200 VAC units, between line-to-line connections.
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Several internal protection functions are used to safeguard the instrument against abnormal line
conditions while also preventing AC mains islanding. The following conditions cause the instrument to
shut down:
If the line voltage is greater than 120% of the highest nominal rating for one line cycle.
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If the line voltage is less than 50% of the lowest nominal rating for three line cycles.
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If the line current is greater than 120% of the highest expected line current for about one second.
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If the line frequency shifts more than 2 Hz from the initial line frequency for more than one second.
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If a one-cycle line dropout occurs.
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70
RP793xA-RP794xA and
section.
RP795xA-RP796xA common characteristics,
Keysight RP7900 Series Operating and Service Guide