<If applicable, customer to identify any pertinent fuses and specify their ratings (manufacturer, model, and ampacity) > Initials: Time: Comments Protective Function Tests: The customer will demonstrate that each protective function operates as expected and confirm that each protective function trips its designated output contact(s). Applicable functions shall be tested on a per-phase basis. < Customer to complete the settings, test points, and expected trip times in the table below. The customer shall modify the table (add elements, applicable units, etc.) as applicable to their facility. Protective functions will then be verified by National Grid personnel during the witness test.> Line-to-Neutral Voltage Base _______ Line-to-Neutral Secondary Nominal Voltage ________ PT Ratio_________ CT Ratio__________ Curve and Pickup Time Dial, OR Pickup Trip Expected Measured National <Indicate Set Time Tests Test Points Contact Protection Time Time Delay Grid units below Delay <Indicate (overcurrents Comments Operates Functions <Indicate <Indicate Witness as <Indicate units units only) (PASS/ units> units> Initials applicable> as applicable below> FAIL) below> A: A 3X ( A) B: C: A 51P B 5X ( A) B C A C 10X ( A) B C 3X ( A) 51G 5X ( A) 10X ( A) A A 3X ( A) B C 51 C**(See A voltage B 5X ( A) B control value C if used) A C 10X ( A) B C A A 27-1 B B - C C A A - 27-2 B B C C 59-1 A A
<If applicable, customer to identify any pertinent fuses and specify their ratings (manufacturer, model, and ampacity) > Initials: Time: Comments Protective Function Tests: The customer will demonstrate that each protective function operates as expected and confirm that each protective function trips its designated output contact(s). Applicable functions shall be tested on a per-phase basis. < Customer to complete the settings, test points, and expected trip times in the table below. The customer shall modify the table (add elements, applicable units, etc.) as applicable to their facility. Protective functions will then be verified by National Grid personnel during the witness test.> Line-to-Neutral Voltage Base _______ Line-to-Neutral Secondary Nominal Voltage ________ PT Ratio_________ CT Ratio__________ Protection Functions Pickup <Indicate units below as applicable> Curve and Time Dial, OR Set Time Delay <Indicate units as applicable below> Pickup Tests <Indicate units below> Test Points (overcurrents only) Expected Time <Indicate units> Measured Time Delay <Indicate units> Trip Contact Operates (PASS/ FAIL) National Grid Witness Initials Comments 51P A 3X ( A) A: B: C: B 5X ( A) A B C C 10X ( A) A B C 51G 3X ( A) 5X ( A) 10X ( A) 51 C**(See voltage control value if used) A 3X ( A) A B C B 5X ( A) A B C C 10X ( A) A B C 27-1 A - A B B C C 27-2 A - A B B C C 59-1 A A
NGrid_Witness_Test_Procedure_TemplateREV2_w_RTUs_10-17-17.docx