S.W.POWER COMP.'S POWER TRIPPED OFF AT ""POTASH JUNCTION"". ALL POWER WAS LOST AT THE MINE. THE HOISTMAN ON DUTY CALLED P.S. THE POWER WAS RESTORED AT 1:00AM WHILE THE POWER WAS OFF NO WORK WA S DONE IN THE MINE. AFTER THE POWER WAS RESTORED, TESTS WERE MADE WITH BOTH HOISTS AND PRODUCTION RESUMED.