LOS ANGELES, May 8 (Reuters) - The Arizona Public Service Palo Verde 1,247-megawatt nuclear power unit 3 in Arizona will restart after refueling in the next several days, near its schedule, an APS spokesman said on Monday.

The unit is one of three at the biggest nuclear power plant in the United States. The beleaguered unit 1 at the Palo Verde power station is still offline and is not expected to return until at least late June, said the APS spokesman.

Unit 3 went offline for refueling on March 31.

The 1,243-megawatt Unit 1 shut on March 18 and has not been producing at normal rates since last Oct. 7. It shut Oct. 7, 2005 for refueling. The unit then restarted on Dec. 23 and reached 32 percent of output within a few days. That was reduced to 25 percent in January until the March 18 shutdown.

The Palo Verde nuclear power station can produce 3,804 megawatts of electricity.

Unit 2 at the plant was operating fully on Monday at its capacity of 1,314 megawatts, the U.S. Nuclear Regulatory Commission said in a daily report.

One MW powers about 800 homes, according to year-round North American averages.

APS is a subsidiary of Pinnacle West Capital Corp. (PNW.N: Quote, Profile, Research).

The owners of Palo Verde are are APS (29.1 percent), the Salt River Project in Arizona (17.5 percent), Edison International's (EIX.N: Quote, Profile, Research) Southern California Edison Co. subsidiary (15.8 percent), El Paso Electric Co. (EE.N: Quote, Profile, Research) (15.8 percent), PNM Resources Inc.'s (PNM.N: Quote, Profile, Research) Public Service Co. of New Mexico subsidiary (10.2 percent), Southern California Public Power Authority (5.9 percent) and the Los Angeles Department of Water & Power (5.7 percent).