5-2
BE1-50/51B-235/-236 Testing
9252000898 Rev —
f.
Set INST PICKUP (50-A) to 90.
g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (15.0 Aac).
2. Apply and increase current to terminals 8 and 9 until the Active/Pickup LED turns red. The applied
current should be no greater than 0.55 Aac.
3. Decrease the applied current until the Active/Pickup LED changes from red to green and then off.
4. Set TIME PICKUP to 2.2.
5. Slowly increase current to terminals 8 and 9 until the Active/Pickup LED turns red. The applied
current should be between 2.131 and 2.269 Aac.
6. Reduce the applied current to zero.
Time Dial
1. Connect and configure the relay for time dial testing:
a. Connect the test setup shown in Figure 5-1.
b. Set circuit board switch SW3 as follows:
SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation
SW3-2 = OFF (no additional time delay for the 50-A element)
SW3-3 = ON (Westinghouse/ABB type characteristic curves)
SW3-4 = ON (integrating reset characteristic)
c. Set TIME DIAL to 4.5.
d. Set CURVE to S.
e. Set TIME PICKUP to 1.0.
f.
Set INST PICKUP (50-A) to 90.
g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (15.0 Aac).
2. Prepare to apply 1.5 Aac to terminals 8 and 9 and record the elapsed time from when current is
applied until the 51 output contacts close.
3. Apply the current (step from 0 to 1.5 Aac) and record the elapsed time. The elapsed time should be
between 0.345 and 0.424 seconds. (This tolerance is greater than
±
2% because it is the
accumulation of both pickup and timing tolerances.)
4. Remove the input current.
Integrating Reset
1. Connect and configure the relay for integrating reset testing.
a. Connect the test setup shown in Figure 5-1.
b. Set circuit board switch SW3 as follows:
SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation
SW3-2 = OFF (no additional time delay for the 50-A element)
SW3-3 = ON (Westinghouse/ABB type characteristic curves)
SW3-4 = ON (integrating reset characteristic)
c. Set TIME DIAL to 9.9
d. Set CURVE to V.
e. Set TIME PICKUP to 1.0.
f.
Set INST PICKUP (50-A) to 90.
g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (15.0 Aac).
2. Apply 4.0 Aac to terminals 8 and 9. After the unit trips, remove the applied current for 29
±
0.25
seconds, then reapply the current (4.0 Aac). Note the elapsed time from the reapplication of current to
the second trip. The elapsed time should be 2.08
±
0.4 seconds.
Instantaneous Overcurrent A (50-A) Pickup
1. Connect and configure the relay for 50-A pickup testing:
a. Connect the test setup shown in Figure 5-1.
b. Set circuit board switch SW3 as follows:
www
. ElectricalPartManuals
. com
