Basler Electric BE1-50/51B-241 - Manual (Page 18)

10 9252000792 Rev D
Table 3. Circuit Board Controls
Locator Description
A Target Operating Current Jumpers. Two user-adjustable jumpers control the range of trip
circuit current required to operate the time overcurrent (51) and instantaneous overcurrent
A (50-A) target indicators. Jumper J1 sets the minimum current range for the 50-A target
indicator and J2 sets the minimum current range for the 51 target indicator. Two jumper
positions are possible: across pins 1 and 2 or across pins 2 and 3. When the jumper is
installed across pins 1 & 2, the targets must operate
≥ 2.25 A and must not operate < 900
mA. When the jumper is installed across pins 2 & 3, the targets must operate ≥ 200 mA and
must not operate < 80 mA.
B Four Position Slide Switch. This switch assembly, designated SW3, has four independent
slide switches designated SW3-1, SW3-2, SW3-3, and SW3-4. Each switch functions as
follows:
SW3-1 selects the nominal system frequency. The OFF position selects 60 Hz operation
and the ON position selects 50 Hz operation.
SW3-2 provides an additional time delay for the instantaneous overcurrent A (50-A)
element. The ON position provides an additional delay of 100 milliseconds.
SW3-3 selects either GE IAC or Westinghouse CO/COM type characteristic curves. The
ON position selects the GE IAC type curves (listed in Table 4) and the OFF position selects
the Westinghouse CO/COM type curves (listed in Table 5).
SW3-4 selects either an instantaneous or integrating time reset characteristic. The ON
position selects an integrating reset characteristic and the OFF position selects an
instantaneous reset characteristic.
C Instantaneous Overcurrent B Pickup Selector Switches. These two screwdriver-adjusted,
rotary switches select the instantaneous overcurrent B (50-B) pickup current setting in
amperes.
The 50-B pickup switches are accessed on the right side of the draw-out assembly by
removing the draw-out assembly from the case.
SW9 is a 16-position switch that sets the units portion (#.#) of the 50-B pickup setting in
amperes. SW9 setting positions consist of 0 through 9 which correspond to values of 0 to 9
amperes and A through F which correspond to values of 10 to 15 amperes. SW10 is a 10-
position switch that sets the tenths portion (#.#) of the 50-B pickup setting in amperes.
SW10 setting positions consist of 0 through 9 which correspond to values of 0.0 to 0.9
amperes.
The minimum allowable 50-B pickup setting is 1.0 Aac and the maximum allowable 50-B
pickup setting is 15.9 Aac. Adjusting the 50-B pickup selector switches while the relay is in
service may cause the relay to trip.
Example: SW9 position 2 and SW10 position 5 is a setting of 2.5 Aac.
Controls and Indicators BE1-50/51B-241