Protection Features; Over Voltage Protection (Ovp); Over Current Protection (Ocp) - ITech IT8500plus Series User Manual

5. Press [Shift] +[8] keys to enter system menu. Press Right key till "Displ"
flicks and press [Enter] key.
6. Press [
key.
7. Press [ESC] to exit setting.
8. VFD second line will display time 0.0000S between power value and set
value.
OFF CC
0.0001V
0.00W
Measurement of Rise Time
9. Connect DC power to be tested to the input terminal of the electronic load.
The power is set with a value that is higher than the set final voltage value.
Keep power output in OFF status.
10. Set a constant current value on the load and open the load input.
11. Open power output.
12. The electronic load timer starts timing. After ending, time will keep stable,
which is rise time of voltage.
13. Close the power output. The electronic load VFD will display voltage drop
time.

3.17 Protection Features

DC load protection features include: OVP, OCP, OPP, OTP, reverse
voltageprotection(LRV/RRV).

3.17.1 Over Voltage Protection (OVP)

If input voltage exceeds the voltage limit set by the user, the DC load will turn
the input OFF and the buzzer will sound. The display will show OVP.
Operations to clear the OVP state
Disconnect the instrument under test. Press any key on the front panel, the
OVP

3.17.2 Over Current Protection (OCP)

The DC load includes both hardware and software over current protection
features.
Hardware OCP: maximum input current of the DC load will be limited at about
110% of the current range, once the hardware OCP is activated, the status
register's OC bit will be set; when the hardware OCP is removed, the status
register's OC bit will be reset. Hardware over current protection won't change
the DC load's On/Off state.
Software OCP: users can set the DC load's software OCP value, steps:
[Shift] +[9] >
set delay time before alarm. When the software OCP function is actived, the DC
load will automatically turn off, VFD displays OCP.
Operations to clear the OCP state
Disconnect the instrument under test. Press any key on the front panel, the
OCP
state.
] key to select "On". Start timer function and press [Enter]
0.0002A
0.0000S CC=0.000A
on the VFD will disappear, then the DC load exits OVP protection state.
Protect > Alimit
displayed on the VFD will disappear, the DC load exits OCP protection
Copyright © Itech Electronics Co., Ltd.
set ON, Apoint set OCP current value, Adelay
Functions and Characteristics
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