Protective devices
These are the main and the most important component
which plays a key role in the working of the whole system.
It is installed to protect the entire system and to make it in
a safe run position. The protective devices include the need
of over current relay, Phase sequence relay and protection for
over speeding.
Thus for the protection Minilec SPG D2 relays are used. It
provides a protection against over loading, Phase failure, over
current.
Over speeding can be controlled manually by closing the
valve to the inlet of the nozzle as soon as the main grid fails.
This can also be done automatically using a DC motor which
closes the valve immediately as the grid fails.