TDK-Lambda Z160-1.3, Руководство пользователя

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5.3 Alarms and Protective Functions
5.3.1 Introduction
There are several conditions that cause alarm (RED LED blinks). All alarms affect the output. When
an alarm occurs, the respective fault will appear on the display and the alarm LED illuminates. It
is possible that more than one fault (alarm) may be triggered but only the first will be shown on
the display. If the second fault is still active when the first fault is removed, then the second fault
will be displayed.
The following protective functions are incorporated in the power supply:
•
OVP - Over Voltage Protection
•
UVP - Under Voltage Protection
•
ILC - Interlock
•
FOLD - Fold Back Constant Current or Constant Voltage
•
AC FAIL - AC Power shut down
•
OTP - Over Temperature Protection
5.3.2 Over Voltage Protection
The OVP circuit protects the load in the event of a remote or local programming error or a power
supply failure. The protection circuit monitors the voltage at the power supply sense points thus
providing the protection level at the load. Upon detection of an Over Voltage condition, the power
supply output will shut down.
5.3.2.1 Setting the OVP Level
The OVP can be set when the power supply output is Enabled (On) or Disabled (Off ). The minimum
setting level is 5% above the output voltage, or the value in Table 5-1, whichever is higher.
The maximum setting level is shown in Table 5-1.
1. Press PROT button. PROT (GREEN) LED illuminates. ”
O
” message appears on the Voltage
display.
2. Press Voltage encoder. ”
O
” message appears on the Voltage display and the Current display
shows OVP setting level.
3. Rotate the Current encoder to adjust the OVP level.
4. Press PROT button twice or wait 15 sec. to return display to its previous state and then PROT
LED turns OFF.
Min. OVP Max. OVP Model
5V 176V 160V
5V 353V 320V
5V 717V 650V
Table 5-1: Maximum/Minimum OVP setting levels