5-6
BE1-50/51B-237/-238 Testing
9252000899 Rev —
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 5 and 6.
5. Apply 0.9 Aac to terminals 5 and 6.
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 5 and 6.
8. Reset
targets.
Model BE1-50/51B-238 (One Ampere Sensing Input)
Time Overcurrent (51) Pickup
1. Connect and configure the relay for 51 pickup testing:
a. Connect the test setup shown in Figure 5-4.
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 (GE IAC type characteristic curves)
SW3-4 = ON (integrating reset characteristic)
c. Set the TIME DIAL to 0.0.
d. Set CURVE to S.
e. Set TIME PICKUP to 0.1.
f.
Set INST PICKUP (50-A) to 18.0.
g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (3.0 Aac).
2. Apply and increase current to terminals 5 and 6 until the Active/Pickup LED turns red. The applied
current should be no greater than 0.11 Aac.
3. Decrease the applied current until the Active/Pickup LED changes from red to green and then off.
4. Set TIME PICKUP to 0.44.
5. Slowly increase current to terminals 5 and 6 until the Active/Pickup LED turns red. The applied
current should be between 0.426 and 0.454 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 5-4.
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 (GE IAC 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 0.2.
f.
Set INST PICKUP (50-A) to 18.0.
g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (3.0 Aac).
2. Prepare to apply 0.3 Aac to terminals 5 and 6 and record the elapsed time from when current is
applied until the 51 output contacts close.
3. Apply the current (step from 0 to 0.3 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.
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