GE 469

5–68 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
• Max. Starts/Hour Permissible: A motor start is assumed to be occurring when the 469
measures the transition of no motor current to some value of motor current. At this
point, one of the Starts/Hour timers is loaded with 60 minutes. Even unsuccessful start
attempts will be logged as starts for this feature. Once the motor is stopped, the
number of starts within the past hour is compared to the number of starts allowable. If
the two numbers are the same, a block will occur. If a block occurs, the lockout time
will be equal to the longest time elapsed since a start within the past hour, subtracted
from one hour.
For example, if
MAX. STARTS/HOUR PERMISSIBLE is programmed at “2”,
– one start occurs at T = 0 minutes,
– a second start occurs at T = 17 minutes,
– the motor is stopped at T = 33 minutes,
– a block occurs,
– the lockout time would be 1 hour – 33 minutes = 27 minutes.
• Time Between Starts Permissible: A motor start is assumed to be occurring when the
469 measures the transition of no motor current to some value of motor current. At
this point, the Time Between Starts timer is loaded with the entered time. Even
unsuccessful start attempts will be logged as starts for this feature. Once the motor is
stopped, if the time elapsed since the most recent start is less than the
TIME BETWEEN
STARTS PERMISSIBLE settings, a block will occur. If a block occurs, the lockout time will
be equal to the time elapsed since the most recent start subtracted from the
TIME
BETWEEN STARTS PERMISSIBLE. A value of “0” effectively disables this element.
For example, if
TIME BETWEEN STARTS PERMISSIBLE is programmed = 25 min.
– a start occurs at T = 0 minutes,
– the motor is stopped at T = 12 minutes,
– a block occurs,
– the lockout time would be 25 minutes – 12 minutes = 13 minutes