Basler BE1-67N, Instruction Manual

Page: 51 / 75

9190700990 Rev F BE1-67N Testing 5-3
6. Reduce I
O
to 1.8 Aac.
7. Confirm that the non-directional instantaneous trip output contacts at terminals 14 and 15 open.
8. Adjust the Non-Directional Instantaneous Overcurrent control fully clockwise.
Directional, Instantaneous Overcurrent Pickup Test
1. Perform the Preliminary Test Setup before proceeding with time overcurrent pickup testing.
2. Set the polarizing voltage source (V
O
) for 4.0 Vac at a 0
°
phase angle.
3. Rotate the Directional, Instantaneous Overcurrent control fully clockwise.
4. Apply 2.0 Aac of I
O
.
5. Slowly adjust the Directional, Instantaneous Overcurrent control counterclockwise until the directional
instantaneous trip output contacts (terminal 11 and 13) close.
6. Adjust the V
O
phase angle until the directional instantaneous trip output contacts open and the
Directional Instantaneous Inhibit indicator lights. The V
O
phase angle should be 75
° ±
5
°
.
7. Adjust the V
O
phase angle for 0
°
. The directional instantaneous trip output contacts should close.
8. Reduce I
O
to 1.8 Aac.
9. Confirm that the directional instantaneous trip output contacts open.
10. Rotate the Directional, Instantaneous Overcurrent control fully clockwise.
V
O
Directional Verification
For the following tests, it will be necessary to adjust and monitor the magnitude of voltage and current as
well as the phase angle relationship between sensing quantities. The results should be recorded on polar
graph paper to understand the significance of the results. Blank polar graph forms are provided in
Appendix B,
Polar Graph Forms .
1. Perform the Preliminary Test Setup before proceeding with time overcurrent pickup testing.
2. Adjust the polarizing voltage source (V
O
) for 4.0 Vac at a 0
°
phase angle.
3. With the I
O
current source set at 1.0 Aac (low range) or 2.0 Aac (high range), and the Characteristic
Angle switch set at 0
°
, vary the phase angle of the V
O
input through 360
°
and note the phase angles
within which the Directional Timing Inhibit indicator turns off. When these results are illustrated on a
polar plot, the graph should resemble a v-shaped line through the origin from –75
°
to +75
°
,
±
5
°
. This
plot defines the trip region as shown in Figure 5-2.
Figure 5-2. Trip Zone Using V
O
as Polarizing Source (Char. Angle = 0
°
)