Q&A(FAQ)
Operating Principle & Precautions for Use
Input condition
- What happens if high/low input frequency is applied?
- What is the adverse effect of input line impedance?
- What issues can occur when operating outside the input voltage specification?
- Is it possible to use a UPS as an input source?
- Is it possible to apply DC voltage to an AC-DC power supply?
- What is meaning of (L) and (N) on AC terminal?
- Is it acceptable to apply a 400 Hz input to an AC-DC unit?
- How to Use a Three-Phase EMI Filter with Single-Phase Input?
Load condition
- How can pulse/peak current be drawn?
- How to read derating curve?
- Why does audible noise occur with pulse load?
- Effects on the Power Supply During Motor Start/Stop.
- Maximum Output Power When Adjusting the Output Voltage.
- Cautions when connecting FG and -V.
- What is output voltage setting and accuracy?
- How to calculate external capacitor value from required hold-up time?
EMC
Protection circuit
Attached function
- Where are the noise sources and pathways in a PSU?
- What's the difference between parallel / redundancy operation?
- Examples of DC-DC converter application circuits.
- What does "Open collector" mean?
-
How to use Remote Control Function with -R option?
(Enclosed and Open frame type Power Supply) - Cautions in Series Operation.
- Cautions for Series Operation of SMPS with Synchronous Rectification.
Others
Component Choice, Others
Component Choice
Others
- What is measurement item in TEST DATA?
- How to calculate the heat generation?
- What does the information indicated on the nameplate mean?
- How to read the lot number?
-
What is the meaning of the QR code?
(Enclosed and Open Frame Type Power Supplies) - Ordering Information for Semi-Standard Models.
- Withstand Voltage and Insulation Resistance Test Instructions
- Why does LED light during Withstand Voltage Test?
- How is the temperature measured?
Reliability
Reliability
- What is the Expected Lifetime of an Electrolytic Capacitor?
- Electrolytic Capacitor Lifetime at Varying Ambient Temperatures.
- What is MTBF?
- How long is the expected lifetime of a power supply with a built-in fan?
- How long is the storage limitation?
- What are the harmful effects of operating outside the specified ambient temperature range?
- What is Heat Cycle Test?
- What is MSL(Moisture Sensitivity Level)?