Protection - GE 869 Instruction Manual

PROTECTION

Protection
4–108
The 869 protection elements are organized in six (6) identical setpoint groups: Setpoint
Group 1 to Setpoint Group 6.
Figure 4-33: Protection Display Hierarchy
Level 1
Each Setpoint Group has the same protection functions, depending on the relay order
code.
Motor Elements
• Percent Differential
• Thermal Model (49)
• Current Unbalance (46)
• Mechanical Jam (50LR)
• Undercurrent (37)
• Loss of Excitation (40)
• Overload Alarm
• Short Circuit
• Ground Fault (50SG)
• Acceleration Time
• Underpower (37P)
Device
System
Inputs
Outputs
Data Capture
Protection
Monitoring
Control
FlexLogic
Testing
Level 2
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Motor
2-Speed Motor
Current
Group 1
Voltage
Group 2
Impedance
Group 3
Power
Group 4
Frequency
Group 5
Group 6
Level 3 Level 4
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