Device 66 - Notching Or Jogging Device - Cold Starts Per Hour - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Advanced Motor Protection and RTD Protection Functions

6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour

6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour
Overview
The cold starts per hour function is used to enforce a maximum number of cold starts of the
machine over an adjustable time period. An attempt to cold start the machine in excess of the
allowable number can be programmed to trip, alarm, or block start. A cold start is defined as a
start that occurs when the thermal capacity used is below an adjustable value
Note
The Protection Systems Engineer must ensure that either the fixed or variable Thermal Model
protection parameters are properly set.
A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It
is not possible to use these functions without a thermal model. The software is arranged to
automatically enable the fixed thermal model once one the three functions is enabled. That is,
the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal
capacity functions are enabled.
If the thermal model is not configured properly, the system will not be protected as intended.
Device 66 provides parameter status as shown in table Advanced
Notching or Jogging - Cold Starts per Hour.
Table 6-26 Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour (ID 7593)
Keypad Parameter Text
Tool Parameter Text
% Thermal Capacity used to define a Cold
Start
Max Cold Starts per Hour
Max Cold Starts
Maximum Number of Cold Starts per the
time interval
Time Interval
Time Interval
Picklist
Enable State
Max Cold Starts per Hour Enable State
The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.
134
ID Units
7594 %
7595
7596 sec
ID Units
7597
Advanced Motor Protection for Variable Speed Operation
Motor Protection Menu -
Default Minimum - Maximum Value
Value
5
2
3600
Default
Value
Disabled
● Disabled
● Alarm
● Latched Alarm
● Trip
Manual, AA, A5E46373908A
0 - 100
0 - 16
0 - 18000
Values