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869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION
CHAPTER 4: SETPOINTS
2-Speed Motor
The two-speed motor feature provides proper protection for a two-speed motor where
there are two different full load values. If the two-speed motor feature is used, setpoint
2-
Speed Motor Protection
must be set to Enabled under
Setpoints > System > Motor > Setup
.
Also, assignable input for setpoint
Speed2 Motor Switch
under
Setpoints > System > Motor
> Setup
must monitor for a contact closure. Contact closure signifies that the motor is in
Speed 2; if the input is open, it signifies that the motor is in Speed 1. This allows the 869 to
determine which settings must be active at any given point in time.
2-Speed Thermal
Model
Path:
Setpoints > Protection > Group1(6) > 2-Speed Motor > Speed2 Thermal Model
When the two-speed motor functionality is used, these settings allow the selection of the
proper parameters for the thermal model when the motor is switched to the second speed.
There is one thermal model in the 869, and it has inputs for overload conditions from
calculations at both speeds. As such, the accumulated thermal capacity is calculated from
overload contributions at each speed.
The algorithm integrates the heating at each speed into one thermal model using a
common thermal capacity used register value for both speeds.
Refer to the
section for details on settings for thermal model at the
second motor speed.
OVERLOAD CURVE
Range: Motor, Flexcurve A, Flexcurve B, Flexcurve C, Flexcurve D, IEC
Default: Motor
TD MULTIPLIER
Range: 1.00 to 25.00 in steps of 0.01 when thermal model curve is Motor
Default: 1.00
Range: 0.00 to 600.00 in steps of 0.01 when thermal model curve is Flexcurve
Default: 0.00
VOLT. DEPENDENT (VD) FUNCTION
Range: Disabled, Enabled
Default: Disabled
VD MIN MOTOR VOLTS
Range: 60 to 99% in steps of 1
Default: 80%
VD VOLTAGE LOSS
Range: Off, Any FlexLogic operand
Default: Off
VD STALL CURRENT @ MIN V
Range: 1.50 to 20.00 FLA in steps of 0.01
Default: 4.50 x FLA
VD STALL TIME @ MIN V
Range: 0.1 to 1000.0 in steps of 0.1
Default: 20.0 s
VD ACCEL. INTERSECT @ MIN V
Range: 1.50 to 20.00 in steps of 0.01
Default: 4.00 x FLA
VD STALL CURRENT @ 100% V
Range: 1.50 to 20.00 FLA in steps of 0.01
Default: 6.00 x FLA
Содержание 869
Страница 10: ...VIII 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL ...
Страница 48: ...1 38 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION ...
Страница 78: ...2 30 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL ELECTRICAL INSTALLATION CHAPTER 2 INSTALLATION ...
Страница 127: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL 3 49 ...
Страница 129: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL 3 51 ...
Страница 538: ...4 406 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 4 SETPOINTS ...
Страница 578: ...6 22 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL FLEXELEMENTS CHAPTER 6 METERING ...
Страница 592: ...7 14 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL CLEAR RECORDS CHAPTER 7 RECORDS ...