GE c60 Instruction Manual page 271

CHAPTER 5: SETTINGS
PMU 1 VA... IG CALIBRATION MAGNITUDE
sources, and they allow the user to calibrate each channel (four voltages and four currents) individually to offset errors
introduced by VTs, CTs. The setting values are effectively a multiplier of the measured magnitudes. Therefore, entering a
multiplier greater than 100% of the secondary signal increases the true signal, and a multiplier less than 100% value of the
secondary signal reduces the true signal.
— This setting allows correcting positive- and negative-sequence voltages for vector groups of
PMU 1 SEQ VOLT SHIFT ANGLE
power transformers located between the PMU voltage point and the reference node. This angle is effectively added to the
positive-sequence voltage angle and subtracted from the negative-sequence voltage angle. Note that:
• When this setting is not "0°", the phase and sequence voltages do not agree. Unlike sequence voltages, the phase
voltages cannot be corrected in a general case and therefore are reported as measured.
• When receiving synchrophasor data at multiple locations, with possibly different reference nodes, it can be more
beneficial to allow the central locations to perform the compensation of sequence voltages.
• This setting applies to PMU data only. The C60 calculates symmetrical voltages independently for protection and
control purposes without applying this correction.
• When connected to line-to-line voltages, the PMU calculates symmetrical voltages with the reference to the AG
voltage and not to the physically connected AB voltage (see the Metering Conventions section in Chapter 6).
— This setting allows correcting positive and negative-sequence currents for vector groups of
PMU 1 SEQ CURR SHIFT ANGLE
power transformers located between the PMU current point and the reference node. The setting has the same meaning for
currents as the
PMU 1 SEQ VOLT SHIFT ANGLE
except rare applications when the voltage and current measuring points are located at different windings of a power
transformer.
5.5.7.11 PMU triggering overview
SETTINGS  SYSTEM SETUP  PHASOR MEASUREMENT UNIT  PHASOR MEASUREMENT UNIT 1(2)  PMU 1(2)
TRIGGERING
 PMU 1
 TRIGGERING
Each Phasor Measurement Unit (PMU) contains five triggering mechanisms to facilitate triggering of the associated PMU
recorder, or cross-triggering of other PMUs in the system. They are:
• Overfrequency and underfrequency
• Overvoltage and undervoltage
• Overcurrent
• Overpower
• High rate of change of frequency
The pre-configured triggers can be augmented with a user-specified condition built freely using programmable logic of the
relay. The entire triggering logic is refreshed once every two power system cycles.
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
— These settings recognize applications with protection class voltage and current
setting has for voltages. Normally, the two correcting angles are set identically,
 PMU 1 USER

 TRIGGER
 PMU 1 FREQUENCY

 TRIGGER
 PMU 1 VOLTAGE

 TRIGGER
 PMU 1 CURRENT

 TRIGGER
 PMU 1 POWER

 TRIGGER
 PMU 1 df/dt

 TRIGGER
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SYSTEM SETUP
5
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