Development and promotion of outage-free maintenance techniques :
Introduced for HV distribution lines (6kV) in 1984. (Development was completed in 1987.)
(Introduction of mobile power manipulator technique was completed in 1989.)
Introduced for LV distribution lines (100V or 200V) in 1987. (Development was completed in 1989.)
Maintenance Outage Achievement
We had the worst record for maintenance outage in all Japan up to 1985.
We have had the best record since 1988.
We have almost eliminated outage in HV and LV lines since 1989.
Annual mean occurrence of maintenance outage per subscriber for both HV & LV systems
This mark means acrobat data. 
