GE IS200ISBAH1A PC104_INSYNC BOARD

Description

GE General Electric Technical Specifications: IS200ISBAH1A

The IS200ISBAH1A may be placed in several simulation modes. This simulation may be useful for several purposes. First, it may be

used to under-stand the operation of the 489 for learning or training purposes. Second, simulation may be used during star

tup to verify that control circuitry operates as it should in the event of a trip or alarm. In addition, simulation may be used to

verify that setpoints had been set properly in the event of fault conditions.

The SIMULATION MODE setpoint may be IS200ISBAH1A entered only if the generator is offline, no current is measured, and there are no

trips or alarms active. The values entered as Pre-Fault Values will be substituted for the measured values in the 489 when

the SIMULATION MODE is “Simulate Pre-Fault”. The values entered as Fault Values will be substituted for the measured val

ues in the IS200ISBAH1A when the SIMULATION MODE is “Simulate Fault”. If the SIMULATION MODE is set to “Pre-Fault to Fault”, the

Pre-Fault values will be substituted for the period of time specified by the delay, followed by the Fault values. If a trip

occurs, the SIMULATION MODE reverts to “Off”. Selecting “Off” for the SIMULATION MODE places the IS200ISBAH1A back in service. If the

IS200ISBAH1A measures current or control power is cycled, the SIMULATION MODE automatically reverts to “Off”.

If the IS200ISBAH1A is to be used for training, it might be desirable to allow all parameter averages, statistical information, and event

recording to update when operating in simulation mode. If however, the IS200ISBAH1A has been installed and will remain installed on

a specific generator, it might be desirable assign a digital input to Test Input and to short that input to prevent all of this data

from being corrupted or updated. In any event, when in simulation mode, the IS200ISBAH1A in Service LED (indicator) will flash, indi

cating that the IS200ISBAH1A is not in protection mode.

The test output relays setpoint may be used during startup or testing to verify that the output relays are functioning cor

rectly. The output relays can be forced to operate only if the generator is offline, no current is measured, and there are no

trips or alarms active. If any relay is forced to operate, the relay will toggle from its normal state when there are no trips or

alarms to its operated state. The appropriate relay indicator will illuminate at that time. Selecting “Disabled” places the out

put relays back in service. If the IS200ISBAH1A measures current or control power is cycled, the force operation of relays setpoint will

automatically become disabled and the output relays will revert back to their normal states.

If any relay is forced, the IS200ISBAH1A in Service indicator will flash, indicating that the 489 is not in protection mode.

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