5-4
BE1-50/51B-235/-236 Testing
9252000898 Rev —
2. Apply and slowly increase current to terminals 8 and 9 until the 50-B output contacts close. The
applied current should be between 1.935 and 2.065 Aac.
3. Decrease the applied current until the 50-B output contacts open.
4. Set INST PICKUP (50-B) to 80 (8.0 Aac).
5. Slowly increase the current applied to terminals 8 and 9 until the 50-B output contacts close. The
applied current should be between 7.815 and 8.185 Aac.
6. Reduce the applied current to zero.
Figure 5-2. 50-B Pickup Test Setup
Target Indicators
1. Connect and configure the relay for target indicator testing:
a. Connect the test setup shown in Figure 5-3.
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 F0 (15.0 Aac).
2. Apply 2 Aac to terminals 8 and 9 to trip the 51 relay output.
3. Slowly increase the target current source and verify that the Time target operates at the level of
current determined by the Target Operating Current Jumpers.
The Target Operating Current Jumpers are located on the circuit board and identified as J1 and J2.
J1 sets the minimum current range for the 50-A target and J2 sets the minimum current range for the
51 target. A jumper installed across pins 1 and 2 gives a minimum operating current of 0.9 to 2.25 A.
A jumper installed across pins 2 and 3 gives a minimum operating current of 80 to 200 mA.
4. Remove the target and sensing current and reset the target.
5. Set TIME PICKUP to 9.0.
6. Set INST PICKUP (50-A) to 01.
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