On- Call PM Services for Electrical Equipment

To provide on-call services to perform preventive maintenance (pm) tasks on electrical equipment plant 1’s electrical distribution system (see appendix 2a: plant 1 single line diagrams) consists of a primary-selective 12. 47kv backbone fed from a double-ended utility substation (sce orcosan sub). The backbone supplies power to twelve power buildings (in-plant secondary substations) some of which have diesel standby generators. A major component of the backbone system is the central generation (cengen) facility that produces 12kv power via up to three 2. 5-megawatt reciprocating engines running continuously on sludge digester gas and natural gas. The cengen facility operates in parallel with utility power and directly feeds several of the power buildings. The 12. 47kv system contains a mix of medium voltage vacuum circuit breakers with protective relays and load interrupter switches with fuse protection. Most power buildings are double-ended with 480v secondary-selective switchgear. The blower buildings are double ended with 4. 16kv and 480v switchgear.