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PUC Rule 21
Recently the California PUC passed their Rule 21 which defines the requirements for Generating Facilty Interconnections.
One of the more difficult aspects to fill is found in Section I.4 specifies two protection requirements for IPPs , which requires that non-exporting-Generating facilities be equipped with either:
- Reverse power relays capable of sensing down to 0.1% of the transformer's rating to ensure power is never exported, or:
- Under-power relays set for 5% of the generator rating to ensure at least a minimum power import. This of course can result in false trips if your load gets close to your generator's capacity.
Both of these requirements are tricky relay situations. The 32SPR Custom Module for the Edison Idea iDP-210 Feeder Relay provides both capabilities using the standard iDP-210 hardware when ordered with the sensitive ground fault option. The reverse power element is even able to accurately detect 1mA secondary of reverse power current!
Click here to access the California P.U.C. Website for the specific requirements of Rule 21 (see Point #3) addressed by the Idea relay:
Or:
Click here for a complete copy of the California PUC Rule 21 in PDF format from PG&E's website
The specific rule is found in Section I.4.
Or:
Click here for a complete copy of the California PUC Rule 21 in PDF format from SCE's website
Click here for catalog section on the iDP-210 Feeder Relay.
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