Transformer - GE G30 Instruction Manual

CHAPTER 6: ACTUAL VALUES

6.4.2 Transformer

6.4.2.1 Differential and restraint currents
ACTUAL VALUES  METERING  TRANSFORMER  DIFFERENTIAL AND RESTRAINT
 DIFFERENTIAL AND
 RESTRAINT
The metered differential current, restraint current, second harmonic current, and fifth harmonic current are displayed for
each phase. See the Percent Differential section in chapter 5 for details on how these values are calculated.
If differential current in any phase is below the hard-coded cutoff of 0.04 pu, then the differential, 2nd harmonic, and 5th
harmonic currents are forced to zero.
6.4.2.2 Thermal elements
ACTUAL VALUES  METERING  TRANSFORMER  THERMAL ELEMENTS
 THERMAL
 ELEMENTS
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
REFERENCE WINDING:

Winding 1
DIFF PHASOR Iad:

0.000 pu 0.0°
REST PHASOR Iar:

0.000 pu 0.0°
DIFF 2ND HARM Iad:

0.0% fo 0.0°
DIFF 5TH HARM Iad:

0.0% fo 0.0°
DIFF PHASOR Ibd:

0.000 pu 0.0°
REST PHASOR Ibr:

0.000 pu 0.0°
DIFF 2ND HARM Ibd:

0.0% fo 0.0°
DIFF 5TH HARM Ibd:

0.0% fo 0.0°
DIFF PHASOR Icd:

0.000 pu 0.0°
REST PHASOR Icr:

0.000 pu 0.0°
DIFF 2ND HARM Icd:

0.0% fo 0.0°
DIFF 5TH HARM Icd:

0.0% fo 0.0°
TOP OIL °C:

70°C
HOTTEST-SPOT °C:

130°
AGING FACTOR:

1.2
DAILY RATE LOL:

15 hrs
XFMR LIFE LOST:

100000 hrs
METERING
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