Author Archive

CAP505 course of PLC REF543: 25. Substation automation – sectional cubicle

We are going to overview configuration of PLC REF543 of sectional cubicle. In particle no. 13 of this article we will describe configuration of ATS. Basic principles of ATS are described in article no. 23 „CAP505-Substation automation – basic principles“. How to insert variable, how to insert function block, how to make connections between functon […]

Read More…

CAP505 course of PLC REF543: 24. Substation automation – voltage transformer 1

In this article I‘ll describe configuration of voltage transformer including configuration of ATS. Basic principles of ATS have been described in article no. 23 „CAP505-Substation automation- Basic principles“. In this article I‘ll overview configuration and settings. How to insert variables, function blocks, how to create connections between function blocks, how to set parameters of function […]

Read More…

CAP505 course of PLC REF543: 23. Substation automation – basic principles

In this article I‘ll cover basic working principles of automatic transfer scheme (ATS). I‘ll describe ATS for industrial power network. Power supplying scheme is shown in picture:   Here we have two 6 kV busbars. To each busbars are connected two asynchronous motors (M1,M2), two synchronous motors (M3, M4) and two power trasformers 6/0,4 kV […]

Read More…

CAP505 course of PLC REF543: 22. Various functions 2: 1-Various blockings; 2-CBFP function with control of current; 3-Clocking of control signals; 4-Configuration of spare binary outputs for time testing of tripping protections

More detail how to insert function blocks, variables, how to set types of variables, how to use various tools of configuration and setting read in previous articles no. 7÷18. Various blockings 1. Circuit breaker can not be closed if: 1. Earth switch is closed. 2. Some of the protections tripped. Only after resetting of tripped […]

Read More…

CAP505 course of PLC REF543: 21. Various funcions: 1- Close/trip circuits supervision; 2-Changing setting groups; 3- Mode of local control

In this article I‘ll give recommendations for implementation of various functions in more common feature. More detail how to insert function blocks, variables, how to set types of variables, how to use various tools of configuration and setting read in previous articles no. 7÷18.   I. Close and trip circuits supervision It is very important […]

Read More…

CAP505 course of PLC REF543: 20. “DR collector tool” application

By using disturbance recorder (DR) you can analyse accidents in network. In this article I’ll show how to configure “DR collector tool” and how to use it. More about this tool you can read in manufacturer‘s ABB manual “LIB, CAP and SMS Tools for Relays and Terminals 1MRS752008-MUM”. “DR collector tool” is used to analyse […]

Read More…

CAP505 course of PLC REF543: 19. “Event log viewer” tool

Here I’ll demonstrate how to read events by using “Events Log Viewer” tool. Everytime after tripping of protections you can analyze what type of protection tripped, also read data of tripping, time of tripping. Also you can fix when circuit breaker closed or opened. First you should connect PC to PLC REF543. This connection is […]

Read More…

CAP505 course of PLC REF543: 18. Configuration of control and testing tripping time of protections

In this article we‘re going to make control configuration. Circuit breaker can be closed with control switch while opening of circuit breaker can be done in several ways: a) by using control switch b) by tripping of various protections. Configuration of control will be created in program unit „Control“. Variables of control will be connected […]

Read More…

CAP505 course of PLC REF543: 17. CBFP protection: configuration and testing

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, […]

Read More…

CAP505 course of PLC REF543: 16. NOC3Inst with UV3Low blocking protection: configuration and testing

Protection NOC3Inst (non-directional overcurrent 3-phase protection instantaneous stage) will trip only when voltage‘s magnitude drops below 0,5xUn (here Un is nominal voltage of PLC analogue input). Usually Un=100 V AC. Function block UV3Low (undervoltage 3-phase low stage) measures voltages. More information about function block NOC3Inst you can find in manufacturer‘s ABB manual “NOC3_ Three-Phase Non-Directional […]

Read More…