The docs aren't very clear about how to handle wildcards in the parameter settings there.
But I would have thought you would want to match "Power supply failure", or something like that, rather than the OID you seem to be matching on there.
That said, it looks like this specific trap OID is used for syslog messages, where syslogs also get sent as traps. I would have thought those switches would send a specific trap for a power supply failure, rather than the generic trap?
If they only send generic traps, then you might want to instead collect/alert on this data via Syslog.