And now for something completely different!
I have been after a power station telegraph for decades and due to the fact most would have been obsolete after the 1940's I assumed I would never be able to obtain one but........
The power station telegraph system is just like the ones found on a ship, to give instruction from the bridge to the engineroom and in this case from the control room to the turbine attendant at the controls in the turbine hall.
The control room operator would move the telegraph handle into the required instruction position, the turbine attendant would then accept the order by moving his handle to the same requested position and in doing so cancels the bell that would be ringing to warn of a new instruction in the turbine hall
So basically the orders are:
STAND BY- gives warning that the telegraph is about to be used either to start up a generating set or shut it down, to put the engineer on stand by
START UP- get the turbine generator running up to running speed
FASTER- Increase speed to allow for synchronization to the grid
STEADY- No speed changes during synchronization
SLOWER- reduce speed during synchronization
ON LOAD- circuit breaker in, generator on load, set the turbine governors to suit.
SHUT DOWN- finished with turbine after disconnection from the grid and finished with the set.
Very soon power station control room operators could adjust remotely the steam valves to slightly adjust the generator speed to connect to the grid thus removing the need for these telegraph systems.
These are so rare that even Battersea power station may have lost the two that were in control room A, unless Lucien has got them!
At last I have finally acquired one to go with our switchboard, just need to find a huge synchroscope........
I have been after a power station telegraph for decades and due to the fact most would have been obsolete after the 1940's I assumed I would never be able to obtain one but........
The power station telegraph system is just like the ones found on a ship, to give instruction from the bridge to the engineroom and in this case from the control room to the turbine attendant at the controls in the turbine hall.
The control room operator would move the telegraph handle into the required instruction position, the turbine attendant would then accept the order by moving his handle to the same requested position and in doing so cancels the bell that would be ringing to warn of a new instruction in the turbine hall
So basically the orders are:
STAND BY- gives warning that the telegraph is about to be used either to start up a generating set or shut it down, to put the engineer on stand by
START UP- get the turbine generator running up to running speed
FASTER- Increase speed to allow for synchronization to the grid
STEADY- No speed changes during synchronization
SLOWER- reduce speed during synchronization
ON LOAD- circuit breaker in, generator on load, set the turbine governors to suit.
SHUT DOWN- finished with turbine after disconnection from the grid and finished with the set.
Very soon power station control room operators could adjust remotely the steam valves to slightly adjust the generator speed to connect to the grid thus removing the need for these telegraph systems.
These are so rare that even Battersea power station may have lost the two that were in control room A, unless Lucien has got them!
At last I have finally acquired one to go with our switchboard, just need to find a huge synchroscope........