The main scope of this article is CBFP (circuit breaker failure protection) protection. There will be shown how to configure, define and how works this protection.

 

Working principle. Protections NOC3High and NOC3Inst will output the CBFP signals. The protection NOC3High is tripping, but circuit breaker didn‘t open (the reasons may be trip circuit’s failure, failure of circuit breaker). The function block NOC3High begin to clock time (250 ms) after NOC3High signal „Trip“ outputed to circuit breaker. If circuit breaker is closed yet when 250 ms elapsed, function block NOC3High outputs signal „CBFP“. This signal is outputed to higher level of circuit breaker. The time 250 ms is standart. In this article we will configure CBFP protection from protections NOC3High and NOC3Inst. Tripping of CBFP will indicate third LED on HMI of PLC REF543.

How to configure protection NOC3High read in article no. 15 „CAP505 – NOC3High protection: configuration and testing“. Configuration of protection NOC3Inst with UV3Low blocking you can find in article no. 16 “CAP505 – protection NOC3Inst with UV3Low blocking: configuration and testing“.

The tripping time of protection CBFP will be checked in article no. 18 „CAP505 Control configuration and time testing of protection“.

 

More about PLC REF54x configuration read in ABB manual ”Protection & Control Terminals REF 54_, REM 54_, RET 54_, REC”.

How to reset LEDS and navigate on submenu of protections see manufacturer‘s ABB manual „Protection & Control Terminals RE_54_ Operator Manual 1MRS750500-MUM“.

1. Select project‘s object (in my case it is „IC-1“) and run „Relay Configuration Tool“ application:

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2. In project configuration tree select program unit “Control”. Open it:

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3. Creating variable with name „CBClosed“. This variable indicate, that circuit breaker is closed and will be used to invoke protection CBFP. The main condition of CBFP is that circuit breaker didn‘t open after protection tripping.

In article no. 12 „CAP505 – Configuration of positions indications of circuit breaker, truck, earth switch” we have configured binary input BIO1_5_BI1 to indicate „closed position“ of circuit breaker and binary input BIO1_5_BI2 to indicate „opened position“ of circuit breaker.
These binary inputs we will use for creating variable „CBClosed“. Insert logical block „ AND“:

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Insert comment:

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4. Connect binary inputs BIO1_5_BI1 and BIO1_5_BI2 to inputs of logical block „AND“:

17-6By double clicking right mouse button, window „Formal Parameter“ appears. In this window select „negated“:

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Output of logical block „AND“ will be active when binary input BIO1_5_BI1 (closed position of circuit breaker) won‘t be active and binary input BIO1_5_BI2 (opened position of circuit breaker) will be active. Binary input BIO1_5_BI1 after inverting will be activated.

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This is double control of circuit breaker position.

5. Create variable „CBClosed“ and connect them to output of logical block „AND“:

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commented binary inputs:

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Save and close configuration by selecting „File>Save“ and „File>Exit“.

6. In project‘s configuration tree select program „Protect“ and open it:

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The already created configuration of protections NOC3High and NOC3int with UV3Low blocking (see article no. 15 „CAP505 – NOC3High protection: configuration and testing“ and article no. 16 „CAP505 – protection NOC3Inst with UV3Low blocking: configuration and testing“):

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7. Insert logical block „OR“:

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Connect signals „CBFP“ from protections NOC3High and NOC3Inst to inputs of logical block „OR“:

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Outputs „CBFP“ are signals activating CBFP protection. Time of protection CBFP (standart is 250 ms) is defined with „Relay Settings Tool“ application. Setting of CBFP time I‘ll show later in this article.

8. Now we should fulfill CBFP condition, that after tripping of protection NOC3High (or protection NOC3Inst) the circuit breaker is closed yet. Insert logical block „AND“:

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Insert variable with name „CBClosed“:

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Connect them as show in picture:

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9. Create variable with name „NOCCBFP“:

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Connect them to output of logical block „AND“:

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The variable NOCCBFP will be activated only when circuit breaker will be closed and CBFP signal will be tripping.

10. Completed configuration of protection CBFP:

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Save and close configuration by selecting „File>Save“ and „File>Exit“.

11. In project‘s configuration tree select program „Signal“ and open it:

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12. Here we‘ll connect tripping of signal CBFP to third LED on HMI of PLC REF543. Insert function block „MMIALAR3“:

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13. Insert already created variable „NOCCBFP“:

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Connect it to function block „MMIALAR3“ as shown on picture:

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More detail about function block „MMIALAR3“ you can read in manufacturer‘s ABB manual MMIALAR_ Alarm (MMI, remote) 1MRS752355-MUM.

14. Save and close configuration by selecting „File>Save“ and „File>Exit“.

15. Compile configuration by selecting „MAKE>MAKE“:

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Close successfully compiled configuration by selecting „File>Exit“.

16. Now it‘s time to set operate time of protection CBFP. Start „Relay Settings Tool“ application:

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17. Select NOC3High>Control setting“ and set CBFP‘s time, equal to 250 ms:

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18. Select NOC3Inst>Control setting“ set CBFP time, also equal 250 ms:

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Close „Relay Setting Tool“ application by selecting „File>Exit“.

 

Press „YES“:

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19. Now we‘re going to configure third LED of PLC REF543 as CBFP protection.
Open „Relay Mimic Editor“ application:

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20. In „Relay Mimic Editor“ window press button „Alarm LED Texts“:

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21. Name third LED as „NOCCBFP“. The state of third LED should be „Latched, steady“.

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Press „OK“.

22. Save MIMIC by selecting „File>Save“:

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Exit from „Relay Mimic Editor“ application by celecting „File>Exit“.

Press „Yes“:

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23. Now we’re going to send configuration and settings of protection CBFP to PLC REF543. Select project object (in my case „IC-1“) and in “Object Tool” window select “Relay Download tool” application. Open it:

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In „IC-1 Relay download tool“ window click „Send“.

25. After downloading configuration click „File>Exit“ to close „Relay Download Tool“ application.

26. Now we are going to send settings of protection CBFP to PLC REF543. Select project object (in my case „IC-1“) and in “Object Tool” window select “Relay Setting tool” application. Open it:

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27. Select „Download“ button:

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Download all settings to PLC:

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28. Store settings to EEPROM by selecting „Store“ command:

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Close „Relay Settings Tool“ application by selecting „File>Exit“.

 

 

29. Now we‘re going to test CBFP protection. Principle scheme is the same as in article no. 16 „CAP505 – protection NOC3Inst with UV3Low blocking: configuration and testing“.

The principle scheme.
Connection of currents:

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Connections of voltages:

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30. CBFP from protection NOC3Inst with UV3Low blocking testing.

Settings of NOC3Inst protection: I=0,8xIn=0,8x5A=4A.

Injecting currents from testing equipment:
Ia=4,1A, IB=4,1, Ic=4,1A. φa=0˚, φb=240˚, φc=120˚.

 

Settings of UV3Low protection: U=0,5xUn;

Injecting voltages from from testing equipment:
U12=49V, U23=49V, U31=49V; φa=0˚, φb=240˚, φc=120˚.

As you remember after tripping of protection NOC3Inst, the circuit breaker should be closed.

On HMI of PLC REF543:

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The second and third LEDS are indicating tripped protections NOC3Inst and CBFP:

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HMI fixed year, month, day and time of tripping protections.

 

 

On „Measurements“ window:

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In submenu of NOC3Inst category:

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How to reset LEDS and navigate to protection NOC3Inst submenu see manufacturer‘s ABB manual Protection & Control Terminals RE_54_ Operator Manual 1MRS750500-MUM.

 

CBFP protection tripped correctly. The tripping time of protection CBFP will be checked in article no. 18 „CAP505 Control configuration and time testing of protection“.

31. Now it‘s time to test CBFP from protection NOC3High.

Settings of protection NOC3High I=1xIn=1x5A=5A.

Injecting currents from testing equipment:
Ia=5,1A, IB=5,1, Ic=0A; φa=0º, φb=240º, φc=120º.

Principle scheme is the same as in particle no.29 of this article:

 

As you remember after tripping of protection NOC3Inst, the circuit breaker should be closed
On HMI of PLC REF543:

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The first and third LEDS are indicating tripped protections NOC3High and CBFP:

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Measurements on HMI window „Measurements“:

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CBFP protection tripped correctly. The tripping time of protection CBFP will be checked in article no. 18 „CAP505 Control configuration and time testing of protection“.

How to reset LEDS see manufacturer‘s ABB manual Protection & Control Terminals RE_54_ Operator Manual 1MRS750500-MUM.

The tripping time of protections will be checked in the next article no. 18 „CAP505 Control configuration and time testing of protection“. We also configure control of circuit breaker.