Power Supply Function
For bi-directional power supplies, Level can be set to a positive or nega-
tive value, i.e. the same protection limit is set for the output or input
power.
The VFD screen returns to the Protect menu and the OPP setting (take
0.15KW, 1S as an example) is displayed as follows:
PROTECT
3.OPP 0.15KW, 1.000S
4.5.4 Set Under-Current Protection (UCP)
Users can enable the UCP function and set the instrument warm-up time
Warm-up, protection limit Level and protection delay time Delay. When the cur-
rent (i.e., the Meter value) is lower than this protection limit and the warm-up
time, delay time are exceeded, the power supply will enter the UCP state.
Possible Cause
Many reasons can cause UCP, the details are as follows:
• The set protection limit Level is greater than the current Meter value.
• The external (AC input) inputs a lower current.
• The power supply outputs a low current due to a fault.
How to Set
The operation steps to set UCP are as follows.
1. Press the composite keys [Protect] on the front panel to enter the protection
menu. (1U Model)
2. Press the composite keys [Shift]+[Recall] (Protect) on the front panel to en-
ter the protection menu. (2U Model)
3. Rotate the knob to select 4. UCP (Off) and press [Enter].
4. Press the left/right key or rotate the knob to select On and press [Enter] to
enter the setting interface.
5. Set the warm-up time Warm-up, protection limit Level and delay time Delay
in sequence, and then press [Enter] to confirm.
Copyright © Itech Electronic Co., Ltd.
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