9252000991 Rev N
BE1-50/51B Testing
5-3
Test Procedure for Five Ampere Units
TIME 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
•
Set TIME PICKUP to 0.5.
•
Set INST PICKUP to 90.
Step 1. Slowly increase current to terminals 8 and 9. ACTIVE/PICKUP LED should turn RED at a
maximum input current of 0.550 ampere.
Step 2. Decrease input current until ACTIVE/PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 2.2.
Step 4. Slowly increase current to terminals 8 and 9. ACTIVE/PICKUP LED should change from GREEN
to RED at an input current of 2.131 to 2.269 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
•
Set TIME PICKUP to 15.1.
•
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.
Time Dial 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 4.5.
•
Set CURVE to S
•
Set TIME PICKUP to 1.0.
NOTE
When testing TIME overcurrent functions, INST PICKUP settings of 00 will affect
the calibration of the TIME functions. TIME PICKUP settings of 00 also affect
INST functions.
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