5-228 M60 Motor Protection System GE Multilin
5.7 CONTROL ELEMENTS 5 SETTINGS
5
b) MAXIMUM STARTING RATE
PATH: SETTINGS CONTROL ELEMENTS START SUPERVISION MAXIMUM STARTING RATE
The element can be programmed to perform classical monitoring function of Starts Per Hour. However, time interval units
specified by the
START/HR TIME INTERVAL setting are in minutes for increased flexibility. The STARTS/HR MAX NUMBER OF
STARTS setting specifies start attempt number limit during the interval. The time unit and ranges accommodate the starting
requirements of large direct-on-line motors.
The element asserts the following three FlexLogic operands:
•The STARTS-PER-HOUR PKP operand indicates that the maximum permitted starting rate has been reached. When
stopped, the motor should not be restarted until the lockout time elapses.
•The STARTS-PER-HOUR OP operand indicates the motor stopped when the maximum permitted starting rate has been
already reached. This operand should be used to inhibit the start command.
•The STARTS-PER-HOUR DPO operand indicates that the maximum permitted starting rate has not been reached. When
stopped, the motor could be restarted immediately.
The element uses motor status asserted by the Thermal Model element. The thermal protection must be configured prop-
erly in order for this function to operate.
Figure 5–114: MAXIMUM STARTING RATE SCHEME LOGIC
MAXIMUM STARTING
RATE (STARTS/HR)
STARTS/HR FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
STARTS/HR TIME
INTERVAL: 60 min
Range: 1 to 300 min. in steps of 1
MESSAGE
STARTS/HR MAX NUMBER
OF STARTS: 3
Range: 1 to 16 in steps of 1
MESSAGE
STARTS/HR BLOCK:
Off
Range: FlexLogic operand
MESSAGE
STARTS/HR TARGET:
Self-Reset
Range: Self-Reset, Latched, Disabled
MESSAGE
STARTS/HR EVENTS:
Disabled
Range: Disabled, Enabled
833015A2.CDR
STARTS/HR BLOCK:
Off
RUN
FLEXLOGIC OPERANDS
STARTS-PER-HOUR PKP
STARTS/HR FUNCTION:
SETTINGS
Enabled = 1
AND
SETTINGS
STARTS/HRTIMEINTERVAL:
MOTOR STARTING
FLEXLOGIC OPERANDS
MOTOR OFFLINE
STARTS/HR MAX NUMBEROF STARTS:
START
STOP
START
STOP
START
STOP
LAST
STARTS/HRTIMEINTERVAL
PKP OP DPO
LOCKOUT TIME
STARTS-PER-HOUR DPO
STARTS-PER-HOUR OP
ACTUAL VALUE
STARTS/HR LOCKOUT
SETTINGS / SYSTEM
SETUP / MOTOR /
EMERGENCY RESTART:
Off
SETTINGS
reset from
lockout
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