Breaker fail (50bf) test, Functional test procedure – Basler Electric BE1-11t User Manual
Page 387
9424200995 Rev H
375
Breaker Fail (50BF) Test
Functional testing is a way to assess this protection system’s suitability for your application. Functional
testing goes beyond the more basic tests found in acceptance testing, but lacks the detailed function
testing that is part of the commissioning process.
Test each of the following functions to verify that this BE1-11t measures accurately, is within specified
tolerances, and operates correctly. These tests are also suitable for assisting in systematic
troubleshooting in the event that an operation is questioned. Revisiting the test of a specific function can
help verify whether the BE1-11t is operating within specified tolerances. For further assistance, contact
Basler Electric, Technical Sales Support.
Refer to the
chapter for terminal locations and connections.
Reset all targets prior to each test by navigating to the Metering > Status > Targets screen and pressing
the front-panel Reset key. Enter the appropriate username and password if prompted. Clear all logic prior
to each test by using the Settings Explorer in BESTCOMSPlus
® to open the BESTlogic™Plus
Programmable Logic screen and click the Clear button located on the toolbar. After new BESTlogicPlus
settings are made, click the Save button located on the toolbar to compile BESTlogicPlus. Upload
BESTlogicPlus settings by selecting Upload Logic to Device from the Communication pull-down menu.
Operational settings can be sent by selecting Upload Settings to Device from the Communication pull-
down menu or by clicking the Send Settings button on the toolbar.
The actual operating time of an output contact is equal to the recognition time plus the time delay setting
(accuracy) plus 6 milliseconds. Output contact operating time depends upon the type of test set used and
its operating characteristics.
A Functional Test Report is included at the end of this chapter. It should be used to record the results and
verify pickup and timing accuracy.
Refer to the
Breaker Fail (50BF) Protection
chapter for more information on this function.
Functional Test Procedure
The BE1-11t has two types of Breaker Failure Initiates, one being contact only initiate, and the other
being current supervised BE1-11t trip initiate. The following tests are for Contact Only initiate.
Step 1: Use BESTCOMSPlus to send the operational settings in Table 167 to the BE1-11t. Reset all
targets.
Table 167. Operational Settings (BFI52 Contact Initiate)
Setting
Value
BESTCOMSPlus Screen
Description
Element Mode
Enabled
Protection, Current, Breaker Fail (50BF)
Enables 50BF function
Phase Pickup
0
Protection, Current, Breaker Fail (50BF)
Sets phase pickup to 0
Ground Pickup
0
Protection, Current, Breaker Fail (50BF)
Sets ground pickup to 0
Control Timer
0
Protection, Current, Breaker Fail (50BF)
Sets control timer to 0
Delay Timer
100 ms
Protection, Current, Breaker Fail (50BF)
Sets delay timer to 100 ms
50BF
Enabled
Target Configuration, Targets
Enables target for 50BF
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure 258.
•
Blocking is disabled.
•
50BFI is disabled.
•
52BFI is initiated with IN2.
•
OUT1 closes for 50BF Trip.
•
OUT2 closes for 50BF ReTrip.
BE1-11t
Breaker Fail (50BF) Test