Hi
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There is a post on the FaceBook group ?that suggests that if there is a short on the DC output side, the DR60710 power supply cannot handle this because it does not have a built in circuit breaker. As a result of the short the DR60710 is damaged internally and starts sending high voltage to the controllers it is providing power to (controllers = DR5000 / YD7001 command station, DR5033 boosters, etc).? We may be interpreting the post incorrectly, so a translated version of it follows:
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“Just another warning in relation to the old Digikeijs ADJ Power Supplies...
Translation of?'s message using Deepl:
On the photo you can see what can happen if these Digikeijs ADJ power supplies continue to be used without an additional 3.5A fuse in the DC line using the example of a YD7001. As we should know, this power supply outputs up to 33V if the voltage selector switch has a loose contact. This happens more often the older these things get. At this moment, the protective diodes that are supposed to prevent worse things from happening are destroyed. But now comes the second major fault of these power supply units, because they continue to fire 7 to 9 A at the poor YD7001. As we also know, the power supply units have no short-circuit protection. The end result is a charred board, melted housing halves, a soldered DC connection and detached conductor tracks. A fuse may not prevent the initial destruction of the diodes, but it will at least prevent this immense damage caused by charring! So consider carefully whether it is not time to replace the power supply units with safer versions!”
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There is also a video: https://www.youtube.com/watch?v=xYV-M2JXvk0
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Based on this we have questions that hopefully someone in this group can comment on:
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- Has anyone seen this problem ?? If yes, what was the source of the short on the DC side ?
- How do we tell if we have an old power supply -? all 10 of them are DR60710s ??
- Has anyone implemented a 3.5A fuse in the DC line to prevent problems ?
- Does the DR60710-M, which I assume is a newer power supply, address the problem of a short on the DC output side ?
- What other power supplies are people using the the DR5000, YD7001, etc ?
Any information you can provide will be appreciated.
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Jay Lennox
Toronto, Canada
