83-530-000 Rev. G
35
5.4 UNDER VOLTAGE LIMIT (UVL)
The UVL prevents adjustment of the output voltage below a certain limit. The combination of UVL and
OVP functions, allow the user to create a protection window for sensitive load circuitry.
5.4.1
Setting the UVL level
Setting the UVL can be made when the power supply output is Enabled (On) or Disabled (Off). To set the UVL
level, press the OVP/UVL button TWICE, so that the CURRENT meter shows “UUL”. The VOLTAGE meter shows
the UVL setting level. Rotate the VOLTAGE encoder knob to adjust the UVL level. The display will show ‘UUL” and
the setting value for 5 seconds after the adjustment has been completed and then will return to its previous state.
UVL setting values are limited at the maximum level to approximately 5% below the Output Voltage setting. At-
tempting to adjust the UVL above this limit will result in no response to the adjustment attempt. The minimum UVL
setting is zero.
5.5 FOLDBACK PROTECTION
Foldback protection will shut down the power supply output if the load current exceeds the current limit setting
level. This protection is useful when the load circuitry is sensitive to an over current condition
.
5.5.1
Setting the Foldback protection
To arm the Foldback protection, the FOLD button should be pressed so that the FOLD LED illumi-
nates. In this condition, transition from Constant Voltage to Constant Current mode will activate the
Foldback protection. Activation of the Foldback protection disables the power supply output, causes the
ALARM LED to blink and displays “Fb” on the VOLTAGE meter.
5.5.2
Resetting activated Foldback protection
There are four methods to reset an activated Foldback protection.
1.
Press the OUT button. The power supply output is enabled and the Output Voltage and current will return to
their last setting. In this method, the Foldback protection remains armed; therefore if the load current is higher
than the current limit setting, the Foldback protection will be activated again.
2.
Press the FOLD button to cancel the Foldback protection. The power supply output will be disabled and the
VOLTAGE display will show “OFF”. Press the OUT button to enable the power supply output.
3.
Turn the power supply output Off and then On using the SO control (refer to Section 5.7). In this method the
foldback protection remains armed, therefore if the load current is higher than the current limit setting the Fold-
back protection will be activated.
4.
Turn the power supply Off using the switch, wait until the front panel display turns Off, then turn the unit back
ON again. The power supply output is enabled and the Output Voltage and Current will return to their last set-
ting. In this method, the Foldback protection remains armed; therefore if the load current is higher than the
current limit setting, the Foldback protection will be activated again
.
5.6 OUTPUT ON/OFF CONTROL
The Output On/Off enables or disables the power supply output. Use this function to make adjustments to either
the power supply or the load without shutting off the ON/OFF switch. The Output On/Off can be activated from the
front panel using the OUT button or from the rear panel J1 connector. The OUT button can be pressed at any time
to enable or disable the power supply output. When the output is disabled, the output voltage and current fall to
zero and the VOLTAGE display shows “OFF”.
5.7 OUTPUT SHUT-OFF (SO) CONTROL VIA REAR PANEL J1 CONNECTOR
Contacts 2, 3 and 15 of J1 (Fig.4-2, Item 5) serve as Output Shut-Off (SO) terminals. The SO terminals accept a
2.5V to 15V signal or Open-Short contact to disable or enable the power supply output. The SO function will be
activated only when a transition from On to Off is detected after applying AC power to unit. (Thus, in Auto-Restart
mode, the output will be enabled after applying AC power; even if SO is in Off level). After On to Off transition is
detected, the SO will enable or disable the power supply output according to the signal level or the short/open ap-
plied to J1. This function is useful for connecting power supplies in a “Daisy-chain” (refer to Section 5.16). The SO
control can be used also to reset the OVP and Fold Protection. Refer to Section 5.3 and 5.5 for details.
Summary of Contents for GENESYS 10KW
Page 2: ......
Page 3: ......
Page 31: ...83 530 000 Rev G 28 Fig 4 2 Rear panel connections and controls...
