9252000896 Rev A
BE1-50/51B-232 Testing
5-3
Test Procedure
The following tests are performed to verify functionality of the BE1-50/51B-232 overcurrent relay. The
TIME and INST output contact terminals are strapped together. Therefore it is necessary to disconnect
specific wires during the TIME and INST pickup tests. This verifies the proper functionality of the TIME
and INST elements.
The following tools are required:
•
Phillips screwdriver, #1 blade
•
Open- or closed-end wrench, ¼”
•
Non-conductive adhesive tape
TIME Pickup Test
Perform preliminary setup:
•
Place the relay on a flat surface with the rear side facing toward you.
•
Using the screwdriver and wrench, disconnect the wire from the P6 terminal on the relay circuit
board.
•
Use the non-conductive tape to secure the end of the loose wire.
•
Connect test setup as shown in Figure 5-1.
•
Insure that SW3 switches are set: SW3-1 to OFF, SW3-2 to OFF, SW3-3 to ON and SW3-4 to
ON.
•
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 5 and 6. PICKUP LED should turn RED at a maximum input
current of 0.550 ampere.
Step 2. Decrease input current until PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 2.2.
Step 4. Slowly increase current to terminals 5 and 6. 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 PICKUP LED turns OFF.
Remove the relay assembly from the case and connect the loose wire back to the P6 terminal on the
relay circuit board and tighten to 7.25 in-lbs (0.818 N
•
m).
INST Pickup Test
Perform preliminary setup:
•
Place the relay on a flat surface with the rear side facing toward you.
•
Using the screwdriver and wrench, disconnect the wire from the P2 terminal on the relay circuit
board.
•
Use the non-conductive tape to secure the end of the loose wire.
•
Connect test setup as shown in Figure 5-1.
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.
NOTE
Observe all applicable electrostatic discharge (ESD) precautions when handling
the relay draw-out assembly.
Summary of Contents for BE1-50/51B-231
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