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M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SYSTEM SETUP
CHAPTER 5: SETTINGS
5
5.5.4 Motor
SETTINGS
SYSTEM SETUP
MOTOR
These settings reflect the design and configuration of the motor that the relay protects. Some protection elements depend
on these settings for correct operation.
Prior to revision 5.40, RTDs used for motor stator thermal model were defined in this section. With revisions 5.40 and higher,
RTDs are defined in the
SETTINGS
TRANSDUCER I/O
RTD INPUTS
menu.
MOTOR FULL LOAD AMPS
— This setting represents the full load current (FLA) of the motor as a fraction of the CT primary
rating. FLA is a standard motor parameter that can be found on the motor nameplate.
MOTOR OVERLOAD FACTOR
— This setting defines the current level at which the motor is considered to be overloaded. If the
motor current exceeds the
MOTOR OVERLOAD FACTOR
threshold, the M60 thermal model reacts by accumulating thermal
capacity. Normally, this factor is set slightly above the motor service factor to account for inherent load measuring errors
(CTs and limited relay accuracy). The typical total inaccuracy factor is 8 to 10%; as such, for motors with a thermal
capability at rated service factor of 1 or 1.15, set the
MOTOR OVERLOAD FACTOR
to 1.1 or 1.25, respectively.
If the average load current is between full load and the overload factor, the thermal capacity remains constant. If the
average current is less than the full load current, the thermal capacity decays exponentially.
MOTOR NAMEPLATE VOLTAGE
— This setting represents the rated phase-to-phase motor voltage. It is used as a reference for
the voltage dependant thermal overload curve feature and indicates a 100% voltage starting condition.
MOTOR OFFLINE
— This input must be connected to the appropriate external contact. This setting is selected to a contact
input that is connected to an auxiliary contact of the breaker or contactor used to switch the motor. The motor is declared
to be stopped when the phase current falls below 2% of motor full load current (FLA) and the external contact indicates the
switching device is open.
MOTOR
MOTOR FULL LOAD AMPS
(FLA): 1.000 pu
Range: 0.050 to 1.000 pu in steps of 0.001
MOTOR OVERLOAD
FACTOR: 1.00
Range: 1.00 to 1.50 in steps of 0.01
MOTOR NAMEPLATE
VOLTAGE: 600 V
Range: 100 to 50000 V in steps of 1
MOTOR OFFLINE:
Off
Range: FlexLogic operand
EMERGENCY RESTART:
Off
Range: FlexLogic operand
MOTOR LINE SOURCE:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
NUMBER OF STARTS
TO LEARN: 5
Range: 1 to 5 in steps of 1
MOTOR LOAD AVERAGE
CALC. PERIOD: 15 min.
Range: 1 to 90 minutes in steps of 1
2-SPEED MOTOR
PROTECTION: Disabled
Range: Disabled, Enabled
SPEED2 MOTOR SWITCH:
Off
Range: FlexLogic operand
SPEED2 SWITCH 2-1
DELAY: 5.00 s
Range: 0.00 to 600.00 s in steps of 0.01
SPEED2 MOTOR SOURCE:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
SPEED2 MOTOR FLA:
1.000 pu
Range: 0.050 to 1.000 pu in steps of 0.001
Содержание M60
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Страница 10: ...x M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 208: ...4 88 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL FLEXLOGIC DESIGN USING ENGINEER CHAPTER 4 INTERFACES 4 ...
Страница 494: ...5 286 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL CONTROL ELEMENTS CHAPTER 5 SETTINGS 5 Figure 5 158 Time out mode ...
Страница 552: ...5 344 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 596: ...7 14 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 602: ...9 4 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL SATURATION DETECTOR CHAPTER 9 THEORY OF OPERATION 9 ...
Страница 652: ...C 6 M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 660: ...iv M60 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...