Test procedure, Time pickup test, Inst pickup test – Basler Electric BE1-50/51B-231 User Manual
Page 39: Test procedure -3
9252000895 Rev C
BE1-50/51B-231 Testing
5-3
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.
Test Procedure
The following tests are performed to verify functionality of the BE1-50/51B-231 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.
NOTE
Observe all applicable electrostatic discharge (ESD) precautions when
handling the relay draw-out assembly.
Perform preliminary setup:
TIME Pickup Test
•
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.
Perform preliminary setup:
INST Pickup Test
•
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 ON.
•
Set TIME DIAL to 0.0.
•
Set CURVE to S
•
Set TIME PICKUP to 15.9.
•
Set INST PICKUP to 01.
Step 1. Slowly increase current to terminals 5 and 6. 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 5 and 6. 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.