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469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
5.6.2
Thermal Model
PATH: SETTINGS
S5 THERMAL MODEL
THERMAL MODEL
The primary protective function of the 469 is the thermal model. It consists of five key
elements: the overload curve and overload pickup level, the unbalance biasing of the
motor current while the motor is running, the motor cooling time constants, and the
biasing of the thermal model based on Hot/Cold motor information and measured stator
temperature. Each of these elements are described in detail in the sections that follow.
The 469 integrates stator and rotor heating into one model. Motor heating is reflected in
the
A1 STATUS
MOTOR STATUS
MOTOR THERMAL CAPACITY USED
actual value register.
If the motor has been stopped for a long period of time, it will be at ambient temperature
THERMAL
[
]
MODEL
SELECT CURVE STYLE:
Standard
Range: Standard, Custom, Voltage
Dependent
MESSAGE
OVERLOAD PICKUP
LEVEL: 1.01 x FLA
Range: 1.01 to 1.25 in steps of 0.01
MESSAGE
ASSIGN TRIP RELAYS:
Trip
Range: Trip, Trip & Aux2, Trip & Aux2 &
Aux3, Trip & Aux3
MESSAGE
UNBALANCE BIAS
K FACTOR: 0
Range: 0 to 19 in steps of 1. (0 defeats
this feature)
MESSAGE
COOL TIME CONSTANT
RUNNING: 15 min.
Range: 1 to 1000 min. in steps of 1
MESSAGE
COOL TIME CONSTANT
STOPPED: 30 min.
Range: 1 to 1000 min. in steps of 1
MESSAGE
HOT/COLD SAFE
STALL RATIO: 1.00
Range: 0.01 to 1.00 in steps of 0.01
MESSAGE
ENABLE RTD
BIASING: No
Range: Yes, No
MESSAGE
RTD BIAS
MINIMUM: 40°C
Range: 0°C to
RTD BIAS CENTER
value
in steps of 1
MESSAGE
RTD BIAS CENTER
POINT: 130°C
Range:
RTD BIAS MINIMUM
value to
RTD BIAS MAXMIMUM
value
in steps of 1
MESSAGE
RTD BIAS
MAXIMUM: 155°C
Range:
RTD BIAS CENTER
value to
250°C in steps of 1
MESSAGE
THERMAL CAPACITY
ALARM: Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM RELAYS:
Alarm
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3, None
MESSAGE
THERMAL CAP. ALARM
LEVEL: 75% USED
Range: 10 to 100% in steps of 1
MESSAGE
THERMAL CAPACITY
ALARM EVENTS: Off
Range: On, Off
Summary of Contents for Masoneilan 469 Series
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Page 92: ...3 28 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 3 INSTALLATION ...
Page 256: ...5 112 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 5 SETTINGS ...
Page 298: ...6 42 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 6 ACTUAL VALUES ...
Page 321: ...CHAPTER 8 APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL 8 9 808712A1 CDR ...
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