Standard Equipment
The manufacturer shall equip the
turbine-generator unit with the following standard equipment:
1) Speed/Load-Control System.
A speed /load-control system capable of
controlling and regulating the speed of the turbine in conformity
with the performance characteristics hereinafter specified. The
speed/load-control system should include means by which the
steady-state speed regulation may be adjusted to values within the
limits hereinafter specified.
Adjustment of the steady-state speed
regulation, while the turbine is in operation, is not required by
this recommended practice unless otherwise agreed upon between the
manufacturer and the purchaser.
2) Speed/Load Reference Changer.
A speed/load changer by means of which
the speed or power output of the turbine may be changed within the
limits hereinafter specified while the turbine is in operation. The
speed/load reference changer shall be equipped with means for manual
adjustment and should be equipped to accept input(s) for remote
control.
3) Valve Position Limiter (Load
Limit).
For turbines rated over 10 MW, a valve
position limiter manually adjustable to limit the degree of opening
of the control valves to any value within the full range of valve
travel while the turbine is in operation.
If this device is used for
load-limiting purposes, the speed-control system will not necessarily
control the overspeed of the turbine, if the speed/load reference
changer is set at its high-speed stop.
4) Miscellaneous.
At the discretion of the manufacturer,
any instruments, controls, or safety devices not specified as
standard equipment in (1), (2), and (3) may be included.
Optional Equipment
The following devices or other optional
devices may be specified by the purchaser:
1) Valve Position Limiter.
For turbines rated 10 MW or under, a
valve position limiter.
2) Adjustment of Steady-State
Regulation.
A means by which, in the
speed/load-control system the steady-state speed regulation may be
adjusted, within limits agreed to by the manufacturer and purchaser,
while the turbine is operating at any power output.
3) Remote or Local Indication.
A means for remote or local indication,
or both, of the positions of the control valves or any other element
of the control system to be specified by the purchaser.
4) Remote Control of the Valve
Position Limiter.
For turbines rated over 10 MW, a means
for remote setting of the valve position limiter within the limits
hereinafter specified.
5) Remote Control of Speed/Load
Reference Changer.
For turbines rated over 10 MW, a means
for remote control of the speed/load reference changer within the
limits hereinafter specified.
6) Miscellaneous.
At the discretion of the manufacturer,
any instruments, controls, or safety devices not previously specified
as optional equipment may be included.
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