5
TDK-Lambda
HWS
30A-150A/ME
Series
INSTRUCTION MANUAL
4. Explanation of Functions and Precautions
4-1. Input Voltage Range
Input voltage range is single phase 85-265VAC(47-63Hz) or 120-370VDC. Input voltage, which is out of specification,
might lead unit damage. For cases where conformance to various safeties required, described as 100-240VAC (50-60Hz).
Note : HWS-A/ME series is able to withstand input of 300VAC for 5 seconds (No damage). Please note that to satisfy the
electrical characteristics, the input voltage range must be within 85-265VAC.
4-2. Output Voltage Range
Output voltage is set the rated value at shipment. V.ADJ trimmer can adjust the output voltage within the range.
Output voltage range is /- 20% (48V : +10%/-20%) of nominal output voltage.
To turn the trimmer clockwise, the output voltage will beincreased. Take note when the output voltage is increased
excessively, over voltage protection (OVP) function may trigger and voltage will be shut down. Furthermore, when
increasing the output voltage reduce the output current so as not to exceed the maximum output power.
4-3. Inrush Current
This series equipped Power thermistor to limit the inrush current. This series are Power thermistor method so that higher
current will flow at higher ambient temperature or re-input condition. Please select input switch and fuse carefully with
the high temperature and re-input the power condition. The inrush current value is under cold start at 25
℃
in the
specification.
4-4. Over Voltage Protection (OVP)
The OVP function (Inverter shut down method, manual reset type) is provided. OVP function operates within
5-24V: 125% - 145%, 48V: 115%-135% of nominal output voltage.
When OVP triggers, the output will be shut down. To reset OVP, remove the input of power supply for a few
minutes, and then re-input. In addition, the setting value of OVP is fixed and not adjustable. Pay attention not to
apply higher voltage externally to the output terminal to avoid unit failure. In case of inductive load, put protective
diode in series to the output power line.
4-5. Over Current Protection (OCP)
HWS30A/ME, HWS50A/ME
: Fold back limit and Hiccup mode with automatic recovery.
HWS100A/ME, HWS150A/ME : Constant current limit and Hiccup with automatic recovery.
OCP function operates when the output current exceeds 105% of maximum DC output current of specification.
The outputs will be automatically recovered when the overload condition is canceled. Never operate the unit under over
current or shorted conditions, which may leads damage. OCP setting is fixed and not to be adjusted externally.
