Basler Electric BE1-50/51B-219 - Manual (Page 25)

9252000981 Rev J 19
Warning!
Trip-circuit voltage is present at the front-panel test points. When
shorting the test points, use insulated jumpers to avoid contact with
these voltages.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 0.15 ampere input current to terminals 8 and 9. (0.15 ampere provides input power but
stays below pickup.)
Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.
Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.
Step 5. Reset targets.
Integrating Reset Test
Perform preliminary setup:
•
Connect test setup as shown in Figure 7.
•
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
•
Set TIME DIAL to 4.5.
•
Set CURVE to I.
•
Set TIME PICKUP to 0.20.
•
Set INST PICKUP to 18.0.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 0.8 amperes input current to terminals 8 and 9. After the unit trips, remove the input current
for 20 ±0.25 seconds, then reapply the 0.8 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.
Setting the Relay
Select the desired relay settings before putting the relay into service. Changing pickup current settings
while the relay is in service may cause tripping.
Periodic Tests
General
All relays should be tested periodically to identify and correct any problems that are found.
Single phase relays such as the BE1-50/51B-219 and BE1-50/51B-226 are normally used in groups of
four (three phase and ground) on the protected circuit. This relay scheme allows each unit to be
withdrawn one at a time for testing purposes without losing protection. Only three are required at any one
time to sense all types of faults on a grounded wye system. Refer to Figure 7 and Figure 8 for
recommended test setups.
Periodic Test
Periodic testing should consist of the following procedures.
Step 1. Verify that the instantaneous pickup is within ±2% of the value set on the dials. Pickup occurs
when the INST output contacts close.
BE1-50/51B-219/-226 Testing