Page 385 - Offshore Electrical Engineering Manual
P. 385

372    CHAPTER 4  Protection and Control




                              (A)
                                        Primary injection
                                        test set


                                 A

                                             A

                                             B


                                             C








                                                              64
                                                               V
                              (B)
                                      Primary injection
                                      test set


                                                                     Temporary
                               A                                     short
                                           A

                                           B


                                           C






                                                         A
                                                            64
                                          Temporary short
                                          and voltmeter
                         FIGURE 7.4.10
                         (A) Primary injection test circuit for sensitivity check on a restricted earth fault relay.
                         (B) Primary injection test circuit for stability check on a restricted earth fault relay.
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