User Manual

7.6.2. THE 3U FRESNEL DIAGRAM DISPLAY SCREEN

This screen displays a vector representation of the fundamentals of the phase-to-phase voltages and of the currents. It indicates

their associated quantities (modulus and phase of the phase-to-phase voltage vectors) and the negative-sequence voltage unbal-

ance rate. The reference vector of the representation (at 3 o’clock) is U1.

The information displayed is identical to that described in §7.6.1 but relative to the phase-to-phase voltage.

7.6.3. THE 3A FRESNEL DIAGRAM DISPLAY SCREEN

For sources having a neutral, this screen displays the vector representation of the fundamental component of the phase-to-neutral

voltages and of the current. For 3-wire three-phase (source without neutral), this screen displays only the vector representation

of the fundamental components of the current. It indicates their associated quantities (modulus and phase of the current vectors)

and negative-sequence current unbalance rate. The reference vector of the representation (at 3 o’clock) is A1.

The information displayed is identical to that described in §7.6.1 but relative to the current.

7.6.4. THE L1 FRESNEL DIAGRAM DISPLAY SCREEN

In the presence of the neutral, this screen displays a vector representation of the fundamentals of the phase-to-neutral voltages

and the currents of one phase. It indicates their associated quantities (modulus and phase of the current and phase-to-neutral

voltage vectors). The reference vector of the representation (at 3 o’clock) is the current vector.

|V1|: modulus of the vector of the

fundamental of the phase-to-neutral

voltage of phase 1.

|A1|: modulus of the vector of the fun-

damental of the current of phase 1.

: phase angle of the fundamental

of the phase-to-neutral voltage of

phase 1 relative to the fundamental

of the current of phase 1.

Discs indicating potential saturation

of the channel.

Figure 72: The L1 Fresnel diagram display screen

Note: L2 and L3 display vector representations of the fundamentals of the phase-to-neutral voltages and the currents of phases

2 and 3, respectively. They indicate their associated quantities (modulus and phase of the current and phase-to-neutral

voltage vectors of phases 2 and 3, respectively). The reference vector of the representation (at 3 o’clock) is the current

vector (A2 and A3, respectively).