GE Multilin F650 - Active, Reactive Power, and COSJ Metering

CHAPTER 10: COMMISSIONING 10.8 VERIFICATION OF MEASUREMENT
GEK-106310-AF F650 DIGITAL BAY CONTROLLER 10-7
Percent of Load-to-Trip
The relevant actual values displays are shown below:
Actual > Metering > Primary Values > Current > % of Load-to-trip
Note Percent of load-to-trip is calculated from the phase with the highest current reading. It is the ratio of this current to
the lowest pickup setting among the phase time and instantaneous overcurrent protection features. If all of these features
are disabled, the value displayed is “0”.
- Inject current of various values into Phase A.
- Verify that percent load-to-trip is calculated as the correct
percentage of the most sensitive operational Phase Overcurrent
element and displayed.
- Repeat for phases B and C.
10.8.3 Active, reactive power, and COSJ metering
Equations to be applied for powers in a wye connection are as follows:
Apply the following current and voltage values:
With the indicated voltage and current values, verify that the power measure corresponds to expected values indicated in
the following table:
Maximum admissible error is ± 1% of the test value for P and Q, and 0.02 for cosj.
Power per phase Three-phase power
P=V*I*Cosϕ P=Pa+Pb+Pc
Q=V*I*Senϕ Q=Qa+Qb+Qc
APPLIED VOLTAGE AND CURRENT VALUES PER PHASE
Phase a Phase b Phase c V-I Angles
VI = 50 V, 0º VII = 50 V , 120º VIII = 50V, 240º ϕ=45º
Ia = 10∠45º Ib= 10∠165º Ic = 10∠285
º Cosϕ= 0.707
EXPECTED POWER VALUES
Phase a Phase b Phase c Three-phase
Pa = 353.55 MW Pb = 353.55 MW Pc = 353.55 MW P = 1060.66 MW
Qa = 353.55 MVAr Qb = 353.55 MVAr Qc = 353.55 MVAr Q = 1060.66 MVAr