Function and Features
Copyright © ITECH Electronic Co., Ltd. 41
Load working range when VON LATCH is started
3.17. Protective function
The load is provided with following protective functions: overvoltage protection
(OVP), over-current protection (OCP), over-power protection (OPP) and
over-temperature protection (OTP).
If any one of the above protections is enabled, the load will have corresponding
actions. Press any key on the front board to reset protection functions. For
example, in case of over-temperature protection, the load will give alarm and
the input will automatically switch to OFF status. The load VFD will display OTP.
3.17.1 Over-voltage protection (OVP)
The load will be immediately OFF and the buzzer will sound if the overvoltage
circuit is triggered. OV and VF bits of the status register will be set and OVP will
be displayed on the screen of the load till resetting. In case of overvoltage
protection, the VF pin of the 8-pin connector on rear board of the load outputs
TTL high level and the VF pin can be used for controlling output status of the
power to be tested.
Clear overvoltage protection status:
Inspect whether voltage of object under test is within load rated voltage or set
protection voltage range. If not, disconnect the object. Press any key on front
board (or send command to PROTection:CLEar), the load front board (OVP)
word will get cleared and the load will exit OVP protection status.
3.17.2 Over-current protection (OCP)
The electronic load is provided with two kinds of over-current protections:
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