Disconnect Question [RE-wrenches]

[Allan Sindelar]

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Wrenches,
New Mexico has a requirement that if the utility locks out a grid-tied
system, the utility power must still be able to power the critical loads.
It's a weird and unique complication. With batteryless systems, this has
been of no consequence, as the also-required lockable visible-break
disconnect is OK as is. But with a critical loads served by a backup system,
a double-throw, lockable manual transfer switch is required.

Who makes the lowest cost product that meets these requirements?
1. 3R enclosure
2. Fusibility, neutral buss, and center-off position are not necessary
3. Double-pole OK, but 3-pole may be used if cheaper
4. 60A AC capacity (50A would work, as it's Outback PS-1 equipment, but I
think 60A is standard for most manufacturers); no DC rating required
5. It must be "visible-break", so breakers can't be used, even though they'd
be simpler and cheaper

Thanks for the benefit of our collective experience, as usual.

Allan at +E



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