FTP Series Programmable DC Power Supply Operation Manual
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3.8 Protection
FTP series power supply provides comprehensive protection functions, some of them are user adjustable
protection functions and it is possible to set an protection threshold, while others are not. The adjustable
protection functions includes protections against overvoltage (OVP), overcurrent (OCP), overpower (OPP),
foldback, reverse voltage (RVP), low voltage (LVP), communication time out (Over time). Non-adjustable
protections are triggered by hardware protection circuit, including overtemperature protection (OTP), over
compensate voltage protection (OCVP), module fault protection (FAULT)
When a protection occurs, the power supply will turn off output, sounds an alarm, and prompt corresponding
protection information on display.
1. Press
to enter into the main menu, select “Protection” sub menu under “Set”, press “Enter”, you will
see following interface for protection setting:
Figure 3-11 Protection Setting
2. Rotate the rotary knob to select the protection to be adjusted, press “Enter” to enter into edit status;
3. Use the numeric keys and decimal point key to input data, also you can rotate the rotary knob to increase or
decrease the value;
4. Press “Enter” to validate the input parameters.
Clear Protection
: when protection occurred, to clear the protection state,
press and hold
for 3 seconds.
Overvoltage protection (OVP)
Users are able to set the OVP threshold, setting range 0...110% rated output voltage, set to 0 means to turn off
OVP (Default 110% rated output voltage). OVP is triggered once the output voltage exceeds OVP set, the DC
output is shut off and “OVP” is prompted on display.
Over Compensate Voltage Protection (OCVP)
When using remote V-Sense, the power supply automatically compensate the voltage drop resulted from line loss,
and it is possible to trigger OCVP if the compensate voltage is too high. When OVP occurred, the DC output is
shut off and “OCVP” is prompted on screen.
Table 3-4 Over Compensate Voltage
Model Voltage
40V
50V
80V
120V
160V
300V
Over compensate voltage thresh
2.5V
2.72V
5V
7.5V
10V
18.75V
Model Voltage
400V
600V
800V
1000V
1200V
1500V
Over compensate voltage
25V
37.5V
37.5V
60V
60V
85.7V
