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M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS
CHAPTER 5: SETTINGS
5
The speed 2 undercurrent function uses the same source as other speed 2 motor functions as defined by the
SYSTEM SETUP
MOTOR
2-SPEED MOTOR SOURCE
setting. The phase currents must be configured on this source; otherwise, the
function is disabled. The element responds to per-phase currents.
If the speed 2 undercurrent function is enabled, a trip or alarm are initiated once the IA, IB or IC current magnitude falls
below the pickup level for a period of time specified by the delay. For example, undercurrent can be used to detect loss-of-
load conditions. This can be especially useful for detecting process related problems.
This element is active if the motor is running at speed 2. The undercurrent function at speed 2 becomes functional only if
undercurrent at speed 1 is enabled. When the undercurrent function at any speed is not required, it can be permanently
blocked.
SPEED2 U/CURR START BLOCK DLY
— This setting specifies a time to block the undercurrent function when motor is starting
directly at speed 2. Prior to starting, the motor state is determined from the
MOTOR OFFLINE
operand. See the Motor section
under the
SETTINGS
SYSTEM SETUP
MOTOR
menu for additional information on the motor offline state
determination. The speed 2 undercurrent element is active only when the motor is running at speed 2 and is blocked upon
the initiation of a motor start for a period of time defined by the
SPEED2 U/CURR START BLOCK DLY
setting (for example, this
block can be used to allow pumps to build up head before the undercurrent element trips or alarms). A value of 0 specifies
that the feature is not blocked from start. For values other than 0, the feature is disabled when the motor is stopped and
also from the time a start is detected until the time entered expires.
SPEED2 U/CURR ALARM PICKUP
— This setting specifies a pickup threshold for the alarm stage. Set it less than the motor load
current during normal operations.
SPEED2 U/CURR ALARM PICKUP DLY
— This setting specifies a time delay for the alarm stage. Set it long enough to overcome
any short lowering of the current (for example, during system faults).
SPEED2 U/CURR TRIP PICKUP
— This setting specifies a pickup threshold for the trip stage. Set it less than the corresponding
setting for the alarm stage.
SPEED2 U/CURR TRIP PICKUP DLY
— This setting specifies a time delay for the trip stage. Set it long enough to overcome any
short lowering of the current (for example, during system faults).
SPEED2 U/CURR TRIP RESET DLY
— This setting specifies a time delay to reset the trip command. Set it long enough to allow
the breaker or contactor to disconnect the motor.
SPEED2 U/CURR BLOCK
— This setting specifies an operand used to block the speed 2 undercurrent function. A panel cutoff
switch or other user specified condition typically is used to block the function.
SPEED2 U/CURR TRIP
PICKUP: 0.70 x FLA
Range: 0.10 to 0.95 × FLA in steps of 0.01
SPEED2 U/CURR TRIP
PICKUP DLY: 2.00 s
Range: 0.00 to 600.00 s in steps of 0.01
SPEED2 U/CURR TRIP
RESET DLY: 2.00 s
Range: 0.00 to 600.00 s in steps of 0.01
SPEED2 U/CURR BLOCK:
Off
Range: FlexLogic operand
Содержание M60
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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 ...
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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 ...
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