Ungrounded Wye Unbalance Detection Discussion
(Article # GES6233)
Section 1 | Section 2 | Section 3 | Library Index

Continuing in my series of unbalance detection discussions and schemes we will now look at floating wye (ungrounded) capacitor connections.

Let us start with a balanced 3 phase, three wire capacitor scheme to see what numbers we come up with.

See Figure 1. The parameters, as shown in figure 1 are as follows:

Capacitor Bank 600 KVAR, 12,470 volts, with 2 – 100 KVAR 7200 volt units per phase.

X_C for the 100 KVAR, 7200 volt capacitor is

X_{C =}

X_C of 200 KVAR, @ 7200volts (for each phase) is

X_C =

Capacitance is as follows:

C =

This will be

C = for the 100 KVAR and

C = for 200 KVAR.

Unit current =

Phase current =

Or,