BE1-951
Installation
12-25
Notes:
°
1.
The neutral ground (I
N
) operates on internally calculated residual (3Io) current
2.
VTP connections shown are for H1 case. See Figure 12-13 for S1 case connections
3.
4-wire connection shown as typical. See Figure 12-30 for alternate VTP connections. The
4-wire connection provides negative and zero sequence voltage polarizing for ground faults;
3-wire connection provides negative sequence voltage polarizing.
4.
CT non-polarity connected to relay polarity, power flow from Generator to Bus defined as
power out and ="+" watts; OC elements set for reverse tripping
Figure 12-28. Directional OC Protection of a Small Generator (Potential Polarized)