Local Operation
3-25
3.9 Protection
The AC source provides protection for software and hardware. When protection is
happened, the AC source will quit the output and turn off the output relays, then show the
condition of protection in display. If any protection is triggered to hold normal output, please
remove the errors, then press
ENTER to unlock the protection so as to resume the normal
operation.
Protections for software are listed as below:
When output current is over the I limit or the current specification.
When output power is over the specification.
OUTPUT OVP
1. It is feedback open protection, and means that the feedback loop
is broken or the output voltage goes wrong.
2. When the out voltage is over the limit of each RANGE. See 3.3.
Protections for hardware are listed as below:
It is fan failure protection, and means that the cooling fan malfunctions.
It is inner AD power stage (see 5.1) protection, and means that the
output voltage is over or under the specific value.
It is inner DD power stage (see 5.1) protection, and means that the
output voltage is over or under the specific value.
It is short protection, and means that the output terminals are shorted.
It is power failure protection, and means that the line input voltage is
lower or higher than specification.
It is over temperature protection, and will be enabled when the internal
temperature of the AC source is too high.
This product is not capable of withstanding reverse current or negative
power during inverter testing. Hence dummy load with proper rating
should be implemented to dissipate current generated from inverter.
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