3 Steps for Solving any Two Wattmeter Method Problem Part 1 (Electrical Power PE Exam)

How to solve every two method wattmeter problem on the Electrical Power PE Exam in three quick steps! In Part 1 of this series, we are going to show you: 1. The three "rules" for using two wattmeters to measure the total power of a three-phase balanced or unbalanced circuit *For example, if the negative (-) voltage reference for wattmeter 1 (W1) is on C phase, then the negative (-) voltage reference for wattmeter 2 (W2) MUST also be on C phase. Rule #1 - The negative (-) voltage reference for both wattmeters MUST be on the same phase (both on A, B, or C). Rule #2 - The line current measured on each phase MUST be the same phase as the positive (+) voltage reference for each wattmeter! *For example, if the positive (+) voltage reference for wattmeter 1 (W1) is on A phase, then wattmeter 1 (W1) MUST ALSO measure the line current on A phase. Rule #3 - The positive (+) voltage reference for both wattmeters MUST NOT be on the same phase! *For example, if the positive (+) voltage reference for wattmeter 1 (W1) is on A phase, then the positive (+) voltage reference for wattmeter 2 (W2) MUST NOT be on A phase. 2. How to derive the two method wattmeter formula commonly seen in books depending on which phases the positive (+) and negative (-) voltage polarity for wattmeter 1 (W1) and wattmeter 2 (W2) are connected to: P3ø = W1 + W2 In the configuration that wattmeter 1 (W1) and wattmeter 2 (W2) are shown connected in this video, we can expand this formula into: P3ø = |VAC|·|Ia|·cos(θ-30º) + |VBC|·|Ib|·cos(θ+30º) Click here to watch the next video (Part 2) in this series:    • 3 Steps for Solving any Two Wattmeter Meth...   __________________________________ 👉 Visit the full article on solving Two Method Wattmeter Problems: https://www.electricalpereview.com/3-... . **** PE EXAM *** 🔥 SUBSCRIBE for more videos on how to pass the NCEES® Electrical Power PE Exam!    / @electricalpereview   . 🚀 Ready to PASS the NCEES® Electrical Power PE Exam? Sign up for our FREE online study program for the PE Exam: https://courses.electricalpereview.co... . 👀 Electrical Engineering PE Practice Exam and Technical Study Guide by Zach Stone, P.E.: https://amzn.to/2zKz17u . *** FE EXAM *** ⚡ Looking for help with the NCEES® Electrical and Computer FE Exam? Visit our FE Exam Youtube Channel:    / @electricalfereview   . 👇 Ready to pass the NCEES® Electrical and Computer FE Exam? Sign up for our FREE online study program for the FE Exam: https://www.electricalfereview.com