Basler Electric BE1-51 - Manual (Page 51)

9137200997 Rev G 45
relays with two-phase-and-neutral, three-phase, or three-phase-and-neutral sensing, this
pickup point will be the same for all the phases.
Step 9. Remove input current.
Note
For relays with two-phase-and-neutral or three-phase-and-neutral
sensing (Sensing Input Types I or V), perform Steps 10 through 15.
Otherwise, the time overcurrent pickup point calibration ends here
(unless instantaneous 1 or 2 overcurrent calibration is to be performed
later in these procedures).
Step 10. Reconnect the test set output to the neutral sense terminals. See Figures 26 or 27.
Step 11. Adjust the current to the desired time overcurrent pickup point for the relay.
Step 12. Set the front panel TAP (NEUTRAL) selector to the closest setting above the desired pickup
point.
Step 13. Rotate the front panel CAL (NEUTRAL) control fully CW.
Step 14. Slowly adjust the front panel CAL (NEUTRAL) control CCW until the front panel TIMING
(NEUTRAL) indicator just illuminates to establish the desired time overcurrent pickup point for
neutral sensing.
Step 15. Remove input current.
Note
Pickup point calibration ends here.
Time Overcurrent Curve Selection (Timing Type Z1, Z2, and Z3 Only)
Step 1. Remove the relay cradle front cover to gain access to the logic board time overcurrent
characteristic curve selector.
Step 2. Remove the Phillips screws from both sides of the unit and remove the front panel. See the
Controls and Indicators chapter for the location of the logic board and curve selector.
Step 3. Select the desired curve. See the Time Overcurrent Characteristic Curves chapter for the
desired curve and selector position.
Step 4. Re-install the front panel and the front cover.
Time Delay Selection
Note
If Timing Type Z1, Z2, or Z3 is installed, refer to time overcurrent
curve selection to obtain the desired set of time overcurrent curves
(see the Time Overcurrent Characteristic Curves chapter). Then
proceed to Step 1, following.
If Timing Type Z1, Z2, or Z3 is not installed, determine the timing type
from the model and style number for a specific relay. Then select the
appropriate timing curve (see the Time Overcurrent Characteristic
Curves chapter). Proceed to the following, Step 1.
BE1-51 Tests and Adjustments