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فيديو شرح Transformer Differential Protection Calculating TAP Settings and Compensation Angles in SEL Relays ضمن كورس انظمة الحماية الكهربية شرح قناة Romero Engineering Company، الفديو رقم 19 مجانى معتمد اونلاين
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87T SEL-487E Tap Calculator Spreadsheet: https://www.romeroengineering.co/downloads-87t-tap-calculator
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In this video we discuss how transformer differential (87T) schemes work, using the SEL-487E protection relay as an example. We discuss how to calculate the tap settings for compensating current magnitudes, and how to determine the phase shift compensation needed for transformer differential protection schemes. We also discuss how to program an SEL-487E relay to implement a transformer differential (87T) protection scheme.
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00:00 Intro
00:40 Example substation
02:28 Current magnitude compensation
12:04 Current phase angle compensation
15:32 Programming the SEL-487E Relay