11. Given two machines, one synchronous and one induction: Mach A: 34SM 2.4 kV 60 Hz 1000 kVA X=652. KRL = 0 Mach B: 34M

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11 Given Two Machines One Synchronous And One Induction Mach A 34sm 2 4 Kv 60 Hz 1000 Kva X 652 Krl 0 Mach B 34m 1 (50.73 KiB) Viewed 43 times

11. Given two machines, one synchronous and one induction: Mach A: 34SM 2.4 kV 60 Hz 1000 kVA X=652. KRL = 0 Mach B: 34M 2.4 kV 60 Hz 200 KVA KRL = 0 R1 . 0; 2.6 02: Xm LARGE R2' = 0.6 Ω; x1 X2 2.6 2; The machines are connected to the same shaft and supplied from the same source as shown. If SWA is closed, Mach A is synchronized. Mach A 3 SM With SWA closed and SWB open, the shaft rotates at 720 rpm, CCW. With SWA open and SWB closed, the shaft rotates at 600 rpm, CCW. SWA 30 2400 V 60 Hz Source Mach. A has how many poles? Mach. B has how many poles? SWB Mach; B 3 M With SWA closed and SWB open, the Mach A current (/) is 100 A, pf = 0.0 leading (motor coord.). The internal stator voltage E, (in volts) is: 786 (circle one) 1386 1800 1986 2400 3000 120 600 660 720 1320 0.1667 0.2 (circle one) Now close SWB. The shaft speed (rpm) is: The slip for Mach B: (circle one) -0.2 -0.1667 Mach B Operating mode (M, G, B) of Mach A