GE 469 Instruction Manual page 274

CHAPTER 6: ACTUAL VALUES
Positive Angle Direction
270° Lag
315° Lag
225° Lag
180° Lag
0°
469 Phase Angle Reference
135° Lag
45° Lag
90° Lag
806561A2.CDR
FIGURE 6–3: Phase Angle Measurement Convention
The EnerVista 469 Setup software follows this convention and displays vectors
accordingly.
The 469 Motor Management Relay works with lagging angles only.
The following is a typical presentation of a three-phase system where current lags the
voltage by 30 degrees.
FIGURE 6–4: Current Lagging Voltage by 30° Display
The phasors shown by the relay and the EnerVista 469 Setup software are a clear
representation of the relationship between the system quantities as seen by the relay.
6–18 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL