Tracking Frequency; Flexelements - GE M60 Instruction Manual

METERING
The following metered values are available for the broken rotor bar detection feature.
COMPONENT LEVEL
component of the system frequency.
COMPONENT FREQ
MOTOR LOAD AT BRB CALC.
LOAD DEV.AT BRB CALC.
stage.
TIME OF BRB CALC.
MAXIMUM COMPONENT LEVEL
last data clear.
MAXIMUM COMPONENT FREQ.
MOTOR LOAD AT BRB MAX
acquired.
LOAD DEV. AT BRB MAX
bar was acquired.
TIME OF MAXIMUM BRB

6.3.7 Tracking frequency

ACTUAL VALUES  METERING  TRACKING FREQUENCY
6
 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
System section of chapter 5 for details.

6.3.8 FlexElements

ACTUAL VALUES  METERING  FLEXELEMENTS  FLEXELEMENT 1(16)
 FLEXELEMENT 1

The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
Table 6-2: FlexElement base units
Base unit
CURRENT UNBALANCE
(Amp Unbalance)
DCmA
FREQUENCY
PHASE ANGLE
6-20
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
— This value indicates the level of the broken rotor bar spectral component relative to the spectral
— Indicates the frequency of the broken rotor bar spectral component.
— Indicates the average motor load at the time of the broken rotor bar data acquisition stage.
— Indicates the motor load standard deviation at the time of the broken rotor bar data acquisition
— Indicates the time stamp of the broken rotor bar calculation.
— Indicates the learned maximum level of the broken rotor bar spectral component since the
— Indicates the frequency of the learned maximum broken rotor bar spectral component.
— Indicates the average motor load at the time when data for the maximum broken rotor bar was
— Indicates the motor load standard deviation at the time when data for the maximum broken rotor
— Indicates the time stamp of the maximum broken rotor bar component level.
TRACKING FREQUENCY

60.00 Hz
setting in the
FLEXELEMENT 1

OpSig: 0.000 pu
Description
BASE = 100%
BASE = maximum value of the DCMA INPUT MAX setting for the two transducers configured
under the +IN and –IN inputs.
f = 1 Hz
BASE

= 360 degrees (see the UR angle referencing convention)
BASE
SETTINGS  SYSTEM SETUP  POWER SYSTEM
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: ACTUAL VALUES
menu. See the Power