Nariaoa - Project details
Turbo machinery: Stainless steel Pelena Pelton turbine, with belt drive to 240 Volt / 50Hz AC synchronous alternator, designed for 25 kW of single-phase electrical output. Pelena deflection power cut-off, operated by an electromagnetic "failsafe" over-speed and under-speed control circuit.
Generation:
Weir: Completed November 2003; Reinforced and buttressed concrete, with inbuilt trash rack and settling basin.
Penstock: uPVC rubber ring joint construction, buried over the full length.
Transmission: Overhead "Raison" 3/4/2.5 mm ACSR/GZ Aluminium cable with steel tension strands, to 11,000 Volts, with 8 metre local hardwood timber posts at 50 metre intervals. Cross-arms by Hayman Industries. Tyree transformers type 25M1A rated to 25 kVA, with
Distribution: Underground double-insulated 240 Volt AC with safety protection from RCD breakers. Separate electrical circuits protected by RCD's and circuit breakers.
Commissioning: Due for late 2004 / early 2005 if funding is available
Training provided: A series of training workshops held in the village, including
- One participant in Manawai women's energy workshop (1997)
- Women's energy awareness workshop (one week in late 2004 / early 2005)
- Marapeina Harbour technician's training course (late 2004 / early 2005)
- on-the-job experiential training, April 2003, December 2003.
- participation in one-week Staff Training Seminar, Honiara September 2002.
Operation & Maintenance : not completed yet
Tariffing: Village tariff to be determined by Community Hydro Committee.
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