Basler Electric BE1-51/27C User Manual

Page 58

9137200998 Rev E

TIMING indicator provides the needed pickup indication, do not connect the test setup to
the output terminals. The desired range terminals (HIGH or LOW), however, should be
connected to the relay. The front panel TAP selector is ganged and the adjustment of one
input phase automatically aligns the others, thus, only one set of current sense terminals
need be connected.

(d) Sensing Input Types D or T: Refer to Figures 32 and 34. Because the relay front panel

TIMING indicator provides the needed pickup indication, do not connect the test setup to
the output terminals. The front panel TAP selector is ganged and the adjustment of one
input phase automatically aligns the others, thus, only one set of current sense terminals
need be connected. For adjustment of the front panel TAP (NEUTRAL) selector, the relay
is reconnected for neutral sensing by this procedure.

Note

For three-phase relays, ensure that the test signals are connected to
both the current and voltage terminals for the same phase.

Step 2.

Remove the relay front cover.

Step 3.

Sensing Input Types L or P. 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 0 Vac 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 D, T, or J), 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 32, 34, or 35.

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.

Tests and Adjustments

BE1-51/27C