9252000991 Rev N
BE1-50/51B Testing
5-5
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Set CURVE to I.
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Set TIME PICKUP to 1.0.
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Set INST PICKUP to 90.
Step 1. Set target current source to 1.0 ampere, ac.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 4.0 amperes input current to terminals 8 and 9. After the unit trips, remove the input current
for 20 ±0.25 seconds, then reapply the 4.0 amperes input current. Record the elapsed time from
the re-application of input current to the output retrip.
Result:
Elapsed time should be 1.55 ±0.3 seconds.
Test Procedure for One Ampere Units
TIME Pickup Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-1.
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Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no
instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).
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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 0.1.
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Set INST PICKUP to 18.0.
Step 1. Slowly increase current to terminals 8 and 9. ACTIVE/PICKUP LED should turn RED at a
maximum input current of 0.11 ampere.
Step 2. Decrease input current until ACTIVE/PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 0.44.
Step 4. Slowly increase current to terminals 8 and 9. ACTIVE/PICKUP LED should change from GREEN
to RED at an input current of 0.426 to 0.454 amperes.
Step 5. Decrease input current until ACTIVE/PICKUP LED turns GREEN then OFF.
INST Pickup Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-1.
•
Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no
instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).
•
Set TIME DIAL to 0.0.
•
Set CURVE to S
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Set TIME PICKUP to 3.02.
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Set INST PICKUP to 0.2.
Step 1. Slowly increase current to terminals 8 and 9. INST contacts should close at an input current of
0.191 to 0.209 amperes.
Step 2. Decrease input current until INST output contacts open.
Step 3. Set INST PICKUP to 1.6.
Step 4. Slowly increase current to terminals 8 and 9. INST contacts should close at an input current of
1.563 to 1.637 amperes.
Step 5. Decrease input current until INST output contacts open.
Time Dial Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 5-1.
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