GE 869 - Short Circuit

CHAPTER 6: METERING MOTOR
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 6–9
Figure 6-5: Bearing/ MECH/ Stator Logic diagram
Short Circuit
Path: Metering > Motor > Short Circuit
NOTE
NOTE:
These values are only seen if
Setpoints \ Protection \ Group1\Motor \ Short Circuit \ Function = NOT Disabled.
SC RMS Ia
Range: 0.000 to 120000.000 A in steps of 0.001
SC RMS Ib
Range: 0.000 to 120000.000 A in steps of 0.001
SC RMS Ic
Range: 0.000 to 120000.000 A in steps of 0.001
894208A1.cdr
SETPOINT
Function: Bearing/Mech/Stator
Disabled = 0
METERING
Phase Current : Ia
Frequency: Fs
Speed: Nr
SETPOINT
No. of Rolling Elements (Nb)
Ball Diameter (Db)
Cage Diameter (Dc)
No. of Stator Slots
FLEXLOGIC OPERAND
Motor Running
Motor Overload
AND
AND
OR
Electrical Signature Analysis
(With Load Binning)
RUN
dB Magnitude
AND
Baseline Data Capture
RUN
BASELINE MODE
Monitoring Data Capture
RUN
MONITORING MODE
AND
Baseline Period
SETPOINT
Value = Set
Timer = ON
Timer = OFF
AND
SETPOINT
Pickup Stage 1
OP = Pickup Stage 1
SETPOINT
Pickup Stage 2
OP = Pickup Stage 2
FLEXLOGIC OPERAND
Bearing FLT PKP Stg 1
Mech FLT PKP Stg 1
FLEXLOGIC OPERAND
Bearing FLT PKP Stg 2
Mech FLT PKP Stg 2
Pickup Delay Stage 1
SETPOINT
Dropout Delay
t
PKP
t
RST
Pickup Delay Stage 2
SETPOINT
Dropout Delay
t
PKP
t
RST
FLEXLOGIC OPERAND
Bearing FLT OP Stg 1
Mech FLT OP Stg 1
FLEXLOGIC OPERAND
Bearing FLT OP Stg 2
Mech FLT OP Stg 2
LED
LED
Output Relays
Output Relays
Stator FLT PKP Stg 1
Stator FLT PKP Stg 2
Stator FLT OP Stg 1
Stator FLT OP Stg 2