A2 Metering; Current - GE 339 Instruction Manual

A2 METERING

A2 Metering

Current

4–10
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 Message Up/Down keys the relay shows the following metered values:
• Current
• Voltage
• Power
• Energy
• RTD Temperature
PH A CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
PH B CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
PH C CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
NTRL CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
GND CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
GND CURRENT is shown when the GROUND CT TYPE is set to "1A Secondary" or "5A
Secondary".
SENS GND CURRENT
o
0.00 A 0 lag
Range: 0.00 to 15.00 A, 0 to 359
SENS GND CURRENT is shown when the GROUND CT TYPE is set to "50:0.025".
NEG SEQ CURRENT
o
0.0 A 0 lag
Range: 0.0 to 30000 A, 0 to 359
o
lag
o
lag
o
lag
o
lag
o
lag
o
lag
o
lag
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: ACTUAL VALUES