3-4 BE1-32R, BE1-32O/U Functional Description 9171100990 Rev R
Figure 3-7. Type B/Type V Sensing
Figure 3-8. Type C Sensing
Type D Sensing: Three-Phase Current and Three-Phase Voltage
In three-phase, four-wire circuits, relays with type D sensing calculate the power flowing in the tripping
direction by monitoring three line-to-neutral voltages and three phases of current. This sensing type can
also be applied on a three-phase, three-wire system using phase-to-ground voltages. Type D sensing
configurations are not phase rotation sensitive. The range switch of this sensing type is calibrated in
three-phase watts. Figure 3-9 illustrates the type D sensing configuration.
www . ElectricalPartManuals . com
To Next Page
Loading...
