GE G60 Instruction Manual page 430

5.7 CONTROL ELEMENTS
b) ACCUMULATORS 1 TO 7

PATH: SETTINGS CONTROL ELEMENTS
 FREQUENCY OOB
 ACCUMULATOR 1
Seven frequency out-of-band accumulators are available. The following settings are available for each accumulator.
• FREQ ACCUM 1 FUNCTION: This setting enables and disabled a particular frequency band.
• FREQ ACCUM 1 UPPER FREQ: This setting specifies the upper frequency value, in Hz, below which band 1 values
start to accumulate. This upper frequency value must be greater than the lower frequency value.
• FREQ ACCUM 1 LOWER FREQ: This setting specifies the lower frequency value, in Hz, above which band 1 values
start to accumulate. This lower frequency value must be less than the upper frequency value.
• FREQ ACCUM 1 TIME LIMIT: This value specifies the accumulation time, in seconds, at which the overfrequency
5
accumulation band exceeds the overfrequency accumulation limit and operates.
• FREQ ACCUM 1 TIME PRESET: This setting allows the user to either transfer accumulated frequency time of opera-
tion values from a previous hardware platform to a new platform, or, given that some knowledge of the operation of the
turbine is known, to start accumulation at a user-specified value.
SETTING
FREQ ACCUM BLOCK
= Off
SETTING
FREQ OOB ACCUM
SOURCE
= Volt/amp mag
= Frequency
SETTING
FREQ ACCUM 1
FUNCTION
= Enabled
COMMANDS
RESET FREQ OOB
ACCUMULATORS
PRESET FREQ OOB
ACCUMULATORS
5-270

FREQUENCY OOB ACCUMULATION
FREQ ACCUM 1
FUNCTION: Disabled
FREQ ACCUM 1 UPPER
MESSAGE
FREQ 60.00 Hz
FREQ ACCUM 1 LOWER
MESSAGE
FREQ 60.00 Hz
FREQ ACCUM 1 TIME
MESSAGE
LIMIT:
FREQ ACCUM 1 TIME
MESSAGE
PRESET:
SETTING
AND
FREQ OOB ACCUM MIN AND
VOLT/AMP
V/A > MINIMUM
Figure 5–146: FREQUENCY OUT-OF-BAND ACCUMULATION LOGIC
G60 Generator Protection System

FREQUENCY OOB ACCUMULATOR 1(7)
Range: Enabled, Disabled
Range: 20.00 to 70.00 Hz in steps of 0.01
Range: 20.00 to 70.00 Hz in steps of 0.01
Range: 1 to 65535 s in steps of 1
200 s
Range: 0 to 65535 s in steps of 1
0 s
SETTINGS SETTINGS
FREQ ACCUM 1 UPPER FREQ ACCUM 1 TIME
FREQ LIMIT
FREQ ACCUM 1 LOWER FREQ ACCUM 1 TIME
FREQ PRESET
RUN RUN
Accumulating
≤
t
f < f f
LOWER UPPER ACCUM
ACTUAL VALUE
FREQ OOB BAND 1
ACCUMULATION
FLEXLOGIC OPERANDS
FREQ OOB BAND 2 OP
FREQ OOB BAND 3 OP
FREQ OOB BAND 4 OP
FREQ OOB BAND 5 OP
FREQ OOB BAND 6 OP
FREQ OOB BAND 7 OP
FLEXLOGIC OPERANDS
FREQ OOB BAND 2 PKP
FREQ OOB BAND 3 PKP
FREQ OOB BAND 4 PKP
FREQ OOB BAND 5 PKP
FREQ OOB BAND 6 PKP
FREQ OOB BAND 7 PKP
5 SETTINGS
> t
LIMIT
FLEXLOGIC OPERANDS
FREQ OOB BAND 1 OP
FREQ OOB BAND 1 DPO
FREQ OOB BAND 1 PKP
FLEXLOGIC OPERAND
OR FREQ OOB ACCUM OP
FLEXLOGIC OPERAND
OR FREQ OOB ACCUM PKP
830008A1.CDR
GE Multilin