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All About MEAN WELL Power Supplies > Industrial

MEAN WELL power supplies with remote on/off in “off” condition is the AUX power still available?

Yes in this situation the AUX power is available to be able to use the remote on/off function.

Do I need to derate my power supply when I used it over 2000m?

Yes, for power supplies certified >2000m please read the “note” in the spec. In general, for unpotted models, a derating of 5°C/1000m has to be […]

What is minimum load requirement and where to find this information?

There are some minimum-load requirements on MEAN WELL’s multi-output power supplies. Please read the specification first before connecting to the load. To allow the power […]

Why did the power supply shut down during operation and after turning it off? Can I restart the power supply again?

In general, there are two circumstances that will cause the power supply to shut down. The first one is the activation of the overload protection […]

What is “Inrush Current”? What will we notice?

At input side, there will be (1/2 ~1 cycle, ex. 1/120 ~ 1/60 seconds for 60 Hz AC source) large pulse current (Ipk 20~100A based […]

What is the difference between -V and COM which are marked on the output side?

COM (COMMON) means common ground. Please see below:nSingle output: Positive pole (+V), Negative pole (-V)nMultiple output (Common ground): Positive pole (+V1, +V2,.), Negative pole (COM)

In MEAN WELL’s catalog, we see AC and DC at input, what is it all about?

Due to different circuit designs, the MEAN WELL power supply’s input consists of three types as below: (VAC≒VDC) a. 85~264VAC;120~370VDC b. 176~264VAC;250~370VDC c. 85~132VAC/176~264VAC by […]

What is power good and power fail signals and how can use it?

Some power supplies provide a “Power Good” signal when they are turned on and send out a ” Power Fail” signal when they are turned […]

What are the protection forms of overload/overcurrent?

When current drawn exceeds the rating of the PSU, the protection circuit will be triggered to protect the unit against overload/overcurrent. Protections of overload/overcurrent can […]

What are the suggestions on connecting wires to the power supplies?

To install a power supply into the system, you would need wires for the connection both to the loads and to the energy source. There […]

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