GE M60 UR Series

6-22 M60 Motor Protection System GE Multilin
6.3 METERING 6 ACTUAL VALUES
6
The effective operating quantities of the sensitive directional power elements are displayed here. The display may be useful
to calibrate the feature by compensating the angular errors of the CTs and VTs with the use of the RCA and CALIBRATION
settings.
6.3.6 BROKEN ROTOR BAR
PATH: ACTUAL VALUES  METERING  BROKEN ROTOR BAR
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 spec-
tral component of the system frequency.
• COMPONENT FREQ.: This value indicates the frequency of the broken rotor bar spectral component.
• MOTOR LOAD AT BRB CALC.: This value indicates the average motor load at the time of the broken rotor bar data
acquisition stage.
• LOAD DEV.AT BRB CALC.: This value indicates the motor load standard deviation at the time of the broken rotor bar
data acquisition stage.
• TIME OF BRB CALC.: This value indicates the time stamp of the broken rotor bar calculation.
• MAXIMUM COMPONENT LEVEL: This value indicates the learned maximum level of the broken rotor bar spectral
component since the last data clear.
• MAXIMUM COMPONENT FREQ.: This value indicates the frequency of the learned maximum broken rotor bar spec-
tral component.
• MOTOR LOAD AT BRB MAX: This value indicates the average motor load at the time when data for the maximum
broken rotor bar was acquired.
• LOAD DEV. AT BRB MAX: This value indicates the motor load standard deviation at the time when data for the maxi-
mum broken rotor bar was acquired.
• TIME OF MAXIMUM BRB: This value indicates the time stamp of the maximum broken rotor bar component level.
 BROKEN ROTOR BAR

COMPONENT LEVEL:
-60.0 dB
MESSAGE
COMPONENT FREQ.:
61.85 Hz
MESSAGE
MOTOR LOAD AT BRB
CALC.: 0.81 x FLA
MESSAGE
LOAD DEV.AT BRB
CALC.: 0.01 x FLA
MESSAGE
TIME OF BRB CALC.:
2009/03/05 10:22:39
MESSAGE
MAXIMUM COMPONENT
LEVEL: -58.3 dB
MESSAGE
MAXIMUM COMPONENT
FREQ.: 62.05 Hz
MESSAGE
MOTOR LOAD AT BRB
MAX: 0.95 x FLA
MESSAGE
LOAD DEV. AT BRB
MAX: 0.02 x FLA
MESSAGE
TIME OF MAXIMUM BRB:
2009/03/04 11:32:18