Time To Trip; Time To Reset; Reset Maintenance Command - Eaton Holec Clink II User Manual

CLINK II SCU MANAGER
5.9.7

Time to trip

Time To Trip is calculated only when there is a motor overload. Time To Trip can be read-out via LCU-5. See
table 51. Select:
SCU Manager - Module Protection
Determining whether there is an overload, is done by calculating the theoretical end temperature Tcu of the
copper winding. When T
T exceeds the Temperature Rise Interlock Level the Time To Trip is calculated as the sum of:
cu
1 The time necessary according to the thermal model to reach Motor TemperatureCu = Motor Temperature-
Trip Level and
2 the time necessary according to the MotorOverload model to reach Trip status according to the It-diagram.
Name Range
Time To Trip 0-7200
Name
Temperature Rise Interlock level
5.9.8

Time to reset

Calculating Time To Reset only happens when the motor is not running (contactors K1 and K2 FALSE) and the
temperature of the copper windings (T
Time To Reset can be read-out via LCU-5. See table 53.Select:
Name Range
Time To Reset 0-3600
5.9.9

Reset maintenance command

The reset maintenance command is possible via local and process control. Via local command (LCU-5) select:
SCU Manager - Module Maintenance - reset Operating Hours and reset Number of Starts
functional description scu
< Temperature Rise Interlock Level (see table 52), the Time To Trip is infinite. When
cu
Table 51: Read-out of Time To Trip
Description
Table 52: Setpoint Temperature Rise Interlock Level
Range
0-130
) exceeds the Temperature Rise Interlock Level.
cu
Table 53: Read-out of Time To Reset
Description
.
Parameter
Unit
type
s Actual
Default Unit
65 K
SCU Manager - Module Protection
Access
Unit
Rule
s Actual
version 5.0
Parameter
type
Setpoint
.
.
57