Basler Electric BE1-51/27R - Manual (Page 58)

52 9137200999 Rev F
Step 2. Remove the relay front cover.
Step 3. Sensing Input Types B, C, M, N, R, or S. Verify that the front panel TAP RANGE plate is
installed and the correct range (HIGH or LOW) is visible.
Step 4. Adjust the test voltage to 100 percent of nominal voltage for your relay and current to the
desired time overcurrent pickup point for the relay.
Step 5. Set the front panel TAP selector to the closest setting above the desired pickup point.
Step 6. Adjust the front panel TAP CAL control fully CW.
Step 7. Apply current to the relay.
Step 8. Slowly adjust the front panel TAP CAL control CCW until the front panel TIMING indicator just
illuminates which indicates the desired time overcurrent pickup point for phase sensing. For
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 E, F, U, W, Y, or Z), 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 31, 33, or 34.
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.
Tests and Adjustments BE1-51/27R