5-4
BE1-50/51B-233 Testing
9252000897 Rev A
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Insure that SW3 switches are set: SW3-1 to OFF, SW3-2 to OFF, SW3-3 to ON, and SW3-4 ON.
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Set TIME DIAL to 0.0.
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Set CURVE to S
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Set TIME PICKUP to 1.0.
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Set INST PICKUP to 01.
Step 1. Slowly increase current to terminals 8 and 9. INST contacts should close at an input current of
0.955 to 1.045 amperes.
Step 2. Decrease input current until INST output contacts open.
Step 3. Set INST PICKUP to 08.
Step 4. Slowly increase current to terminals 8 and 9. INST contacts should close at an input current of
7.815 to 8.185 amperes.
Step 5. Decrease input current until INST output contacts open.
Remove the relay assembly from the case and connect the loose wires back to the P6 terminal on the
relay circuit board and tighten to 7.25 in-lbs (0.818 N
•
m).
Time Dial Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-1.
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Insure that SW3 switches are set: SW3-1 to OFF, SW3-2 to OFF, SW3-3 to ON, and SW3-4 ON.
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Set TIME DIAL to 4.5.
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Set CURVE to S
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Set TIME PICKUP to 1.0.
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Set INST PICKUP to 90.
Step 1. Prepare to apply 1.5 amperes input current to terminals 8 and 9 and record the elapsed time from
when current is applied until TIME output contacts close.
Step 2. Apply the current (step from 0 to 1.5 amperes) and record the elapsed time. Elapsed time should
be 0.345 to 0.424 seconds. (This tolerance is greater than ±2 % because it is the accumulation of
both pickup and timing tolerances.)
Step 3. Remove input current.
Target Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-2.
•
Insure that SW3 switches are set: SW3-1 to OFF, SW3-2 to OFF, SW3-3 to ON, and SW3-4 ON.
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Set TIME DIAL to 4.5.
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Set CURVE to S
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Set TIME PICKUP to 1.0.
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Set INST PICKUP to 01.
Step 1. Set target current source to 1.0 ampere, ac.
Step 2. Apply 5 amperes input current to terminals 8 and 9. Check that both TIME and INST targets
operate.
Step 3. Remove input current and reset targets.
Manual Trip Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-2.
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Insure that SW3 switches are set: SW3-1 to OFF, SW3-2 to OFF, SW3-3 to ON, and SW3-4 ON.
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Set TIME DIAL to 4.5.
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Set CURVE to S
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Set TIME PICKUP to 1.0.
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Set INST PICKUP to 01.
Summary of Contents for BE1-50/51B-233
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