Basler Electric BE1-11g - Manual (Page 62)

50 9424200994 Rev N
Terminals Va (C13), Vb (C14), and Vc (C15) are connected in parallel. The single-phase signal is
connected between the parallel group and terminal N (C16).
For single-phase sensing connections derived from a phase-to-phase source:
Terminals Vb (C14), Vc (C15), and N (C16) are connected in parallel. The single-phase signal is
connected between terminal Va (C13) and the parallel group.
Note that the voltage monitor (described below) performs three of three testing for all connections. For
3W and 4W, phases A, B, and C are actually tested. For single-phase connections, the terminals are
connected in parallel as described above and the single-phase is tested three times.
Caution
The Aux VT Connection must be properly selected on the Sensing
Transformers screen in BESTCOMSPlus. Refer to the Configuration
chapter for more information on this setting.
Angle Compensation
Compensation for phase angle differences between the phase and auxiliary VT connections (including
single-phase VTP connections) are possible with the Angle Compensation setting. That is, for a VTP
selection of phase-to-phase and a VTX selection of phase-to-neutral, a value of 30
° should be defined for
angle compensation.
Common system and sensing transformer combinations are shown in Table 11. This table assumes no
step-up or step-down transformer between the two measurement PTs. If the synchronizing zone includes
a step-up or step-down transformer, change the nominal voltages accordingly.
Table 11. Common System and Sensing Transformer Combinations
Phase VT
Connection
Phase
Rotation
Aux VT
Connection
Secondary
Phase Voltage
(Phase-Neutral)
Secondary
Aux Voltage
Angle
Compensation
3-wire ABC AB 69.3 120 0
°
3-wire ABC BC 69.3 120 240
°
3-wire ABC CA 69.3 120 120 °
3-wire ACB AB 69.3 120 0
°
3-wire ACB BC 69.3 120 120 °
3-wire ACB CA 69.3 120 240
°
4-wire ABC AN 69.3 69.3 0
°
4-wire ABC BN 69.3 69.3 240
°
4-wire ABC CN 69.3 69.3 120
°
4-wire ABC AB 69.3 120 30 °
4-wire ABC BC 69.3 120 270
°
4-wire ABC CA 69.3 120 150
°
4-wire ACB AN 69.3 69.3 0
°
4-wire ACB BN 69.3 69.3 120
°
4-wire ACB CN 69.3 69.3 240
°
4-wire ACB AB 69.3 120 330
°
4-wire ACB BC 69.3 120 90
°
4-wire ACB CA 69.3 120 210
°
Sync-Check (25) Protection BE1-11g