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64-2 9424200996

Breaker Fail (50BF) Test BE1-11m

• Fault recording is enabled.

• Breaker Status is closed with /IN1.

Figure 64-1. BESTlogicPlus Settings (BFI52 Contact Initiate)

Step 3: IN1 is used to simulate breaker status as supplied by a “b” contact from the circuit breaker. With

no wetting voltage applied to BE1-11m input IN1, the BE1-11m considers the breaker closed

because of the /IN1 designation at the breaker status input of the breaker failure element. A

switched wetting voltage at IN2 is used to simulate an external BFI52 initiate contact for starting

the Breaker Failure Timer. This input is also used to start the test set timer and OUT1 of the

BE1-11m is used to stop the test set timer. OUT2 should be monitored to verify operation of the

re-trip circuit upon breaker failure initiate.

Step 4: With no wetting voltage applied to BE1-11m input IN1, switch on the wetting voltage to IN2 and

measure the operate time. Record the result.

Step 5: Apply wetting voltage to IN1 and repeat step 4. There should be no operation.

Step 6: Repeat step 3 with the delay timer set at 200 ms and 300 ms. Record the results.

The following tests are for Current Supervised BE1-11m trip initiates. Any or all BE1-11m trips can be

used: 50 Trip, 51 Trip, etc. For ease of testing, the 50-1 Trip variable will be used in the following tests.

Step 7: Use BESTCOMSPlus to send the operational settings in Table 64-2 to the BE1-11m. Reset all

targets.

Table 64-2. Operational Settings (BFI50 Current Supervised BE1-11mTrip Initiate)

Setting

Value

BESTCOMSPlus Screen

Description

Element

Mode

Enabled