KEPCO RCW 1500W Series - Manual (Page 16)

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RCW 1500W 120607
FIGURE 11 TIMING DIAGRAMS FOR THE RCW 1500W POWER SUPPLY
4.2 UNDERVOLTAGE PROTECTION
When the output voltage falls to less then 60% of the rated output voltage (for more then 20 seconds)
the output is cut OFF and the fan stops automatically. To restart (reset) the unit it is necessary to
remove the AC input power, wait 40 seconds and then to reapply the AC input power. Another way
to reset the power supply is to short circuit the (±) RC terminals and then open the terminals). An
indication of undervoltage is provided by a red LED and a logic alarm output (at the (±) AL termi-
nals) .
4.3 PF INPUT POWER FAILURE
When the input voltage to the Power Supply falls down, the power failure circuit alarm will be gen-
erated for 2ms before the output of the Power Supply is cut off. The input voltage power failure is
indicated by a logic alarm output (at the (±) PF terminals).