IS220PPROS1B industrial automation control module DCS PLC system

IS220PPROS1B industrial automation control module DCS PLC system

Technical data of product parameters

Two reverse power IS220PPROS1B functions are used for prime movers with
ratings higher than 30 MW, because of their importance and
value.
The reverse power function has two stages. The setting is half
the slip power of the generator/prime mover unit and is the same
for both stages.
The first stage has a short time delay and is intended to protect
against overspeeding during the normal shutdown procedure. By
tripping the main circuit-breaker via the reverse power function,
the possibility of overspeeding due to a regulator failure or
leaking steam valves is avoided. To prevent false tripping in the
case of steam turbines, the reverse power function is enabled by
auxiliary contacts on the main steam valves of the prime mover.Two reverse power functions are used for prime movers with IS220PPROS1B
ratings higher than 30 MW, because of their importance and
value.
The reverse power function has two stages. The setting is half
the slip power of the generator/prime mover unit and is the same
for both stages.
The first stage has a short time delay and is intended to protect
against overspeeding during the normal shutdown procedure. By
tripping the main circuit-breaker via the reverse power function,
the possibility of overspeeding due to a regulator failure or
leaking steam valves is avoided. To prevent false tripping in the
case of steam turbines, the reverse power function is enabled by
auxiliary contacts on the main steam valves of the prime mover.The stator overload function protects stator windings against excessive temperature rise as a result of overcurrents. The function is applicable to turbogenerators designed according to the IS220PPROS1B
American standard ASA-C50.13 or a similar standard defining
overload capability.
Providing compensation using the reference value of the A/D
channel has not been made, the reference current IB for the
protection is calculated from the generator load current IB1,
which is usually the same as the generator rated current, and the
c.t. rated currents IN1 and IN2 as follows

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This article from the temporal Ming sheng automation equipment co., LTD.,

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