CHAPTER 6: ACTUAL VALUES
METERING
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
6-21
6
The following metered values are available for the broken rotor bar detection feature.
COMPONENT LEVEL
— This value indicates the level of the broken rotor bar spectral component relative to the spectral
component of the system frequency.
COMPONENT FREQ
— Indicates the frequency of the broken rotor bar spectral component.
MOTOR LOAD AT BRB CALC.
— Indicates the average motor load at the time of the broken rotor bar data acquisition stage.
LOAD DEV.AT BRB CALC.
— Indicates the motor load standard deviation at the time of the broken rotor bar data acquisition
stage.
TIME OF BRB CALC.
— Indicates the time stamp of the broken rotor bar calculation.
MAXIMUM COMPONENT LEVEL
— Indicates the learned maximum level of the broken rotor bar spectral component since the
last data clear.
MAXIMUM COMPONENT FREQ.
— Indicates the frequency of the learned maximum broken rotor bar spectral component.
MOTOR LOAD AT BRB MAX
— Indicates the average motor load at the time when data for the maximum broken rotor bar was
acquired.
LOAD DEV. AT BRB MAX
— Indicates the motor load standard deviation at the time when data for the maximum broken rotor
bar was acquired.
TIME OF MAXIMUM BRB
— Indicates the time stamp of the maximum broken rotor bar component level.
6.4.7 Tracking frequency
ACTUAL VALUES
METERING
TRACKING FREQUENCY
The tracking frequency displays here. The frequency is tracked based on the selection of the reference source with the
FREQUENCY AND PHASE REFERENCE
setting in the
SETTINGS
SYSTEM SETUP
POWER SYSTEM
menu. See the Power
System section of chapter 5 for details.
6.4.8 FlexElements
ACTUAL VALUES
METERING
FLEXELEMENTS
FLEXELEMENT 1(16)
The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
LOAD DEV.AT BRB
CALC.: 0.01 x FLA
TIME OF BRB CALC.:
2009/03/05 10:22:39
MAXIMUM COMPONENT
LEVEL: -58.3 dB
MAXIMUM COMPONENT
FREQ.: 62.05 Hz
MOTOR LOAD AT BRB
MAX: 0.95 x FLA
LOAD DEV. AT BRB
MAX: 0.02 x FLA
TIME OF MAXIMUM BRB:
2009/03/04 11:32:18
TRACKING FREQUENCY
TRACKING FREQUENCY:
60.00 Hz
FLEXELEMENT 1
FLEXELEMENT 1
OpSig:
0.000
Содержание M60
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