GE 339

4–10 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
A2 METERING CHAPTER 4: ACTUAL VALUES
A2 Metering
The relay measures all RMS currents and voltages, frequency, and RTD inputs. Other values
like neutral current, symmetrical components, power factor, power (real, reactive,
apparent), are derived. All quantities are recalculated every power system cycle and
perform protection and monitoring functions. Displayed metered quantities are updated
approximately three (3) times a second for readability. All phasors and symmetrical
components are referenced to the A-N voltage phasor for wye-connected VTs; to the A-B
voltage phasor for delta connected VTs; or to the phase A current phasor when no voltage
signals are present.
By scrolling the Up/Down keys the relay shows one-by-one, all metered values as follows:
Current
Path: ACTUAL VALUES > A2 METERING > CURRENT
PH A CURRENT
0.0 A 0
o
lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
PH B CURRENT
0.0 A 0
o
lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
PH C CURRENT
0.0 A 0
o
lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
NTRL CURRENT
0.0 A 0
o
lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
GND CURRENT
0.0 A 0
o
lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
GND CURRENT is shown when the GROUND CT TYPE is set to "1A Secondary" or "5A
Secondary".
SENS GND CURRENT
0.00 A 0
o
lag
Range: 0.00 to 15.00 A, 0 to 359
o
lag
SENS GND CURRENT is shown when the GROUND CT TYPE is set to "50:0.025".
Voltage
Path: ACTUAL VALUES > A2 METERING > VOLTAGE
AN VOLTAGE
0 V 0
o
lag
Range: 0 to 65535 V
AN VOLTAGE ANGLE
0 V 0
o
lag
Range: 0 to 65535 V