Manual trip test, Integrating reset test, Setting the relay – Basler Electric BE1-50/51B-121 User Manual
Page 52: Periodic tests, General, Setting the relay -8, Periodic tests -8, General -8
5-8
BE1-50/51B-214/-215/-223/-225 Testing
9252000994 Rev P
Step 6. Apply 1 ampere input current to terminals 5 and 6. Check that the INST target operates.
Step 7. Remove input current and reset target.
Perform preliminary setup:
Manual Trip Test
•
Connect test setup as shown in Figure 5-2.
•
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 S
•
Set TIME PICKUP to 0.2.
•
Set INST PICKUP to 0.2.
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 5 and 6. (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.
Perform preliminary setup:
Integrating Reset Test
•
Connect test setup as shown in Figure 5-1.
•
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 5 and 6. 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-214/-215/-223/-225 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 This relay scheme allows each unit to be withdrawn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