GFAL-A     Analyzer Unit                      
                                                                GFAL-B      Tracking Unit                                                  
                                                                                GFAL-ST    Site Training
         Locating DC Ground Faults

    Abstract
    Ground faults on battery operate DC Multifeeder Distribution System are very difficult to find without proper instrumentation and training.

    Samco Engineering has design a new microprocessor control instrument with a single purpose “to analyze and locate even the most
    difficult faults on battery operate DC Multifeeder Distribution System”,  for the safeguard of the DC system integrity.

    The Ground Fault Analyzer and Tracking instrument (GFAL-A/B) make use of a very small interrupted and synchronize DC
    signal to analyze and locate DC ground faults on multifeeder distribution system . 

    Remark from one of our nuclear customer, "We have a split 250VDC system with high stray capacitance. We have had no
    luck previously locating grounds on the common bus. We have tried the Bender, Biddle, DC Scout and Ground Hog  equipment
    with no success. We were able to locate a positive ground on Unit One, and an intermittent common ground on Unit Two in
    about 6 hours using the GFAL-A/B equipment. Prior to this, we were living with the grounds."

   

 
gfal-a-b

                                                   GFAL-A and GFAL-B
                 









                            Link to
       analyzer a    GFAL -A                              

        gfal-b    GFAL-B                                    

        training    TRAINING CLASS                         

         
         manual   OPERATION MANUAL  

                                              Equipment and Method highlights

           Ground Fault Analyzer Instrument, Model : GFAL-A 

    *     Performs the interruption functions to locate the DC ground faults up to the point of failure

    *    Functionally test the DC alarm unit operation

    *    Test the DC Distribution System for spike faults and AC contamination

    *    Help to find the value of the fault resistance from each polarity with respect to site ground

    *    Set up the basis for a ground fault predictive maintenance program

        Ground Fault Tracking Instrument, Model: GFAL-B 

    *    Will trace and locate the DC ground faults on DC multi-feeder distribution system, up to the point of failure without service
          interruption

    *    Detect and process the signal produce by the interrupter with a magnetic sensor (unique design) that wrap around the conductors.

    *    Never have to open a circuit or a breaker to troubleshoot a DC distribution system

    *    Set up the basis for a ground fault predictive maintenance program

       Training Lecture "Fundamentals of DC Ground Fault" : GFAL-ST

    *    "Correct and incorrect" ground fault Indication and Location methods and instruments.

    *    How to identify and locate DC ground faults on DC multi-feeder distribution systems

    *    At the site, practical applications 
       
        Recent e-mail from an electrician at a Nuclear Plant to their Training Department
       
        Training Department;
        I recently attended the Ground Fault Analyzer and Locator Instrument (GFAL-A/B) course in training.
        The course was presented by the inventor of the machine who was extremely knowledgeable in the field of
        locating ground faults.
        Little did I know within the next few weeks, I would have the opportunity to use this machine to locate a ground on a DC bus
        in the field.  The machine worked exactly as explained to us and the ground was found.
        The Training Department is doing a great job in meeting the needs of the working. They strive to give training that is useful
        and challenging.  I appreciate their efforts, as do my fellow workers.

        Thank you,
        Richard D., (elect)

        Partial customers list

         *     Plant Bowen 3,540 MW (GA)
         *     Plant Scherer 3,564 MW (GA)
         *     Ray Olinger Plant  420 MW (TX)
         *     City of Anaheim (250 KV) Substation (CA)
         *     El Segundo GS 684 MW (CA)
         *     ExxonMobil Refinery (CA)
         *    Callaway Nuclear Plant (MO)    
         *    Comanche Peak Nuclear Plant (TX)
         *     Wolf Creek Nuclear Plant (KS)
         *     Brunswick Nuclear Plant (NC)
         *     Diablo Canyon Nuclear Plant (CA)
         *     Palo Verde Nuclear Plant (AZ)
         *     Hatch Nuclear Plant (GA)
         *    Vogtle Nuclear Plant (GA)
         *    Three Mile Island Nuclear Plant (PA)



                                                          Carrying case

                                                                                  Carrying Case
                                                      Exterior Dimensions: 13 in. H x 17-1/2 in. W x 13 in. D
 

                                   Contact us at:

                                   Samco Engineering
                                   Fountain Valley, CA 92708
                                   Phone: (714) 235 - 5901
                                  
                                   If you have a question about DC ground fault, please write to us an e-mail,
                                   we will be happy to answer your question.
                                   
                    
                                            E-mail: samcoeng@aol.com
                                            Attention: Engineering Department                                                                                                                                                                                                                                                                                                                                                                                    2008