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Knowledge Base Article #144 - Recloser test procedures desired as a FasTest option
Date	Nov 27, 2006
By	ENOSERV
Filed Under	RTS
Class	General

Issue Addressed
Creating test procedures for Reclosing relays is highly desired by not only our customers, but relaying personnal as a whole. This is not an easy answer to the request.

Causes of Issue
When considering a recloser routine, I have to break this down into what category we are discussing. Is in an external device (Basler-BEI-79, NLR, SGR) or is it an internally created operation with the relay package (SEL-351R). Then we have to determine whether it is a single shot recloser or a multi-shot recloser. From there, we start thinking�.. A single shot recloser is generally not an issue. Many times this can be handled like any timing relay, such as a TD timer. The problem is in a multi-shot recloser. In order for this to become operational, you need to simulate an �a� contact as a minimum, then occasionally a �b� contact. Then with a micro-processor relay, you have to prepare for an internal operation to occur, rather than a simple external input. Then you have to coordinate to process that everything occurs in a realistic fashion. In other words, we have to turn the Test Set into a Breaker simulator. Most of the newer tests can be made to operate in such a fashion, but not the older units. Creating a procedure that can handle most situations with most test sets will be a task. I have planned on attempting to write something that takes the burden off of the User, but time has not permitted that to occur. This should not be a surprise because this has always been a tough relay to test out the of the panel. Most of the time I have seen people build their own Breaker Simulator that allow them to run the relay through it�s operation, but still it did not capture times. Timing was performed with a watch.

Solution to this Issue
My point? This is a tough relay to test properly, regardless what method you choose. We have talked about making a concentrated effort at ENOSERV to deal with this type of testing for a while. Other items have simply taken priority. One solution will be the use of ENOSERV Vector. With a State Simulator, the User can control the inputs of outputs of the test unit as needed. Although, the customer will be responsible for building the procedure as seen fit for this to occur. ENOSERV does have plans of creating operations within a FasTest procedure to model types of operations. Based on the design, the procedures may not be applicable with some types of test sets.

Knowledge Base Article #144 - Recloser test procedures desired as a FasTest option

Date

Nov 27, 2006

ENOSERV

Filed Under

RTS

Class

General

Issue Addressed

Creating test procedures for Reclosing relays is highly desired by not only our customers, but relaying personnal as a whole. This is not an easy answer to the request.

Causes of Issue

When considering a recloser routine, I have to break this down into what category we are discussing. Is in an external device (Basler-BEI-79, NLR, SGR) or is it an internally created operation with the relay package (SEL-351R). Then we have to determine whether it is a single shot recloser or a multi-shot recloser. From there, we start thinking�..

A single shot recloser is generally not an issue. Many times this can be handled like any timing relay, such as a TD timer.

The problem is in a multi-shot recloser. In order for this to become operational, you need to simulate an �a� contact as a minimum, then occasionally a �b� contact. Then with a micro-processor relay, you have to prepare for an internal operation to occur, rather than a simple external input. Then you have to coordinate to process that everything occurs in a realistic fashion. In other words, we have to turn the Test Set into a Breaker simulator. Most of the newer tests can be made to operate in such a fashion, but not the older units.

Creating a procedure that can handle most situations with most test sets will be a task. I have planned on attempting to write something that takes the burden off of the User, but time has not permitted that to occur. This should not be a surprise because this has always been a tough relay to test out the of the panel. Most of the time I have seen people build their own Breaker Simulator that allow them to run the relay through it�s operation, but still it did not capture times. Timing was performed with a watch.

Solution to this Issue

My point? This is a tough relay to test properly, regardless what method you choose.

We have talked about making a concentrated effort at ENOSERV to deal with this type of testing for a while. Other items have simply taken priority.

One solution will be the use of ENOSERV Vector. With a State Simulator, the User can control the inputs of outputs of the test unit as needed. Although, the customer will be responsible for building the procedure as seen fit for this to occur.

ENOSERV does have plans of creating operations within a FasTest procedure to model types of operations. Based on the design, the procedures may not be applicable with some types of test sets.

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