Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay; Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Advanced Motor Protection and RTD Protection Functions

6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay

6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative
Sequence Overcurrent Delay
Overview
Fixed pickup negative sequence overcurrent is used to protect the motor and connected load
against operation under conditions of high negative sequence current or phase current
imbalance. The fixed pickup negative sequence overcurrent function provides a single
negative sequence overcurrent setting that produces a trip or alarm condition when the
negative sequence current rises above that value. The function offers an enable that latches
once a programmable minimum speed has been reached. The function can also be enabled
once a programmable time period has elapsed since the starting of the motor. 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 46_2 provides parameter status as shown in table
Fixed Negative Sequence Overcurrent.
Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence Over Current (ID 7316)
Keypad Parameter Text
Tool Parameter Text
Pickup Level
Fixed Negative Sequence Overcurrent
Pickup Level
Pickup Delay
Fixed Negative Sequence Overcurrent De‐
lay Pickup Level
Dropout Level
Fixed Negative Sequence Overcurrent
Dropout Level
Dropout Delay
Fixed Negative Sequence Overcurrent
Dropout Delay
Low Pass Time Const
Fixed Negative Sequence Overcurrent
Low Pass Time Constant
Minimum Speed
Fixed Negative Sequence Overcurren Min
Speed Enable Point
Startup Time
Fixed Negative Sequence Overcurrent De‐
lay from Startup
54
ID Units
7317 %
7318 sec
7319 %
7320 sec
7321 msec
7322 %
7323 sec
Advanced Motor Protection for Variable Speed Operation
Advanced Motor Protection Menu -
Default Minimum - Maximum Value
Value
5
1
2
0.1
0
20
5
Manual, AA, A5E46373908A
0 - 100
0 - 180
0 - 50
0 - 180
0 - 1000
0 100
0 - 6000