The Control Switch
Unit is located at Telephone Box Junction adjacent to the XC
Ski Centre. Power is supplied from the generator as single
phase 400 volt and is reduced to 240 volts via a step down
transformer to the left of the switch unit
The switch unit
contains the controller in the photo below and a bank of 4 X
50 microfarad capacitors linked in series and attached to
the two black wires shown to the left of the control unit
below
The controller
manages the power output. When there is no demand for power
within the XC Ski Centre the total power supply is dumped
into a bank of bar radiators to heat the building. The total
capacity of the radiator bank is 11 KVA, this matches the
total generating capacity of the plant. As power is switched
on in the building to supply light or power for cooking etc.
the controller automatically senses the demand, taking power
away from the radiator dump bank and allocating it to the
power supply.
The control unit
has two circuit breakers the brown one on the right cuts
power to the whole system, while the white circuit breaker
on the left is on the power supply line to the ski centre.
The power supply circuit breaker must be switched off to
start the system, directing all power into the dump load
circuit.
The red wire and the bottom
right is an earth wire (No Green wire at the time)
The Generator unit
is below the waterfall (60mt vertical fall). Water is fed
via two 100ml pipes at the side of the falls and split into
four 50ml pipes in the final 2 meters directing water onto a
35cm diameter Pelton wheel through four 18ml nozzles. The
Pelton wheel spins horizontally and is attached to the main
shaft of the induction motor.
The Generator is a
Brook Hanson model WUDA160MJ-D A535714
Hz50
11 KVA
1470 RPM
The white feed is
connected directly to the Red Supply to the Transformer
located at the XC Ski Centre while the blue and red feed
from the generator are attached to a bank of capacitors
connected in series (7 X 50 microfarad plus 1 X 45
microfarad). The output from the capacitor bank is connected
to Black Supply to the Transformer located at the XC Ski
Centre.
