Device 48 - Incomplete Sequence Relay Device - Maximum Start Time; Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (Id 7325) - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Advanced Motor Protection and RTD Protection Functions

6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time

6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time
Overview
Maximum start time protects the motor against excessive time between starting and reaching
a desired speed. The function produces a trip or alarm condition when the machine fails to
reach an adjustable speed threshold in an adjustable time period following a start. The per-unit
speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or
encoder.
Note
Encoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the
encoder occurs, the drive will either default to the phase locked loop to obtain motor speed
information or the drive will stop.
Device 48 provides parameter status as shown in table
Maximum Start Time.
Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (ID 7325)
Keypad Parameter Text
Tool Parameter Text
Maximum Start Time
Incomplete Sequence Maximum Start
Time Starting Time
Minimum Speed
Incomplete Sequence Maximum Start
Time Minimum Speed
Low Pass Time Const
Incomplete Sequence Maximum Start
Time Low Pass Time Constant
Picklist
Enable State
Maximum Start Time Enable State
The maximum response time with zero delay (pickup counter=0) is 50 milliseconds.
56
ID Units Default
Value
7326 sec 10
7327 % 50
7328 msec
ID Units Default
Value
7329 Disabled
Advanced Motor Protection Menu -
Minimum - Maximum Value
0
● Disabled
● Alarm
● LatchedAlarm
● Trip
Advanced Motor Protection for Variable Speed Operation
0 - 180
0 - 200
0 - 1000
Values
Manual, AA, A5E46373908A