GE 469 Instruction Manual page 218

469
Motor Management Relay
6–20
: "100.0% at 18° Lag"
Ia PHASOR
: "100.0% at 138° Lag"
Ib PHASOR
: "100.0% at 258° Lag"
Ic PHASOR
The following phasor diagram illustrates the system vector diagram where the
setting is selected as "Wye". By definition, power factor is the
CONNECTION TYPE
cosine of the angle between the phase to neutral voltages and the corresponding
phase current. In this example, 18.2° is the angle between Van and Ia, Vbn and Ib,
and Vcn and Ic. The phase-to-phase quantities are not shown in the
menu and the EnerVista 469 Setup software. However, they are
DATA PHASORS
shown on the following figure.
Phase Rotation
Vcn
Vca
Vbn
Ib
806563A1.CDR
FIGURE 6–10: Typical Phasor Diagram for Wye Connection
The EnerVista 469 Setup software displays the following screen:
http://www.GEindustrial.com/multilin
System Voltages:
Ic
Vab
Measured Voltages
Calculated Voltages
Van
Ia
Displayed Voltages:
Vbc
A2 Metering Data
VT
A2 METERING
Van; Vab
Vbn; Vbc
Vcn; Vca
VA (G2 – G1)
VB (H1 – G1)
VC (H2 – G1)
= ×
Vab 3 VA
= ×
Vbc 3 VB
= ×
Vca 3 VC
Van = VA
Vbn = VB
Vcn = VC
Vab = As Calculated
Vbc = As Calculated
Vca = As Calculated
GE Multilin