9252000898 Rev —
BE1-50/51B-235/-236 Testing
5-5
7. Apply 2 Aac to terminals 8 and 9 to trip the 50-A relay output.
8. Slowly increase the target current source and verify that the Instantaneous target operates at the
level of current determined by the Target Operating Current Jumpers.
9. Remove the target and sensing current and reset the target.
Figure 5-3. Target Indicator Test Setup
Manual Trip
1. Configure the relay for manual trip testing:
a. Connect the test setup as 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 0.0
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 20 (2.0 Aac).
2. Apply 0.9 Aac to terminals 8 and 9 (0.9 Aac provides relay operating power but is below the pickup
threshold.)
3. Connect a jumper to the Time Overcurrent Manual Trip jacks. Verify that the stop input of the test set
timer recognizes a 51 contact closure.
4. Remove the jumper and the current applied at relay terminals 8 and 9.
5. Apply 0.9 Aac to terminals 8 and 9.
6. Connect a jumper to the Instantaneous Overcurrent Manual Trip jacks. Verify that the stop input of
the test set timer recognizes a 50-A contact closure
7. Remove the jumper and the current applied to relay terminals 8 and 9.
8. Reset
targets.
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