Power Supply Function
4.5.1 Set Over-Voltage Protection (OVP)
Users can enable the OVP function and set the protection limit Level and pro-
tection delay time Delay. When the voltage (i.e., the Meter value) is greater than
this protection limit and the delay time is exceeded, the power supply will enter
the OVP state.
Possible Cause
Many reasons can cause OVP, the details are as follows:
• The set protection limit Level is lower than the voltage Meter value.
• The external (AC input) inputs a higher voltage.
• The power supply outputs a high voltage due to a fault.
Please avoid inputting a external voltage higher than 120% rated
value, or the instrument will be damaged.
How to Set
The operation steps to set OVP 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 1. OVP (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 protection limit Level and the delay time Delay in sequence, and
press [Enter] to confirm.
The VFD screen returns to the Protect menu and the OVP setting (take
150V, 1S as an example) is displayed as follows:
PROTECT
1.OVP 150V, 1S
Copyright © Itech Electronic Co., Ltd.
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