Question

Q1) Draw the power and control circuit to reverse the direction of the three-phase motor using only one Delay Timer, so that it rotates in the normal direction for 3 seconds, then it reverses its direction after that, and it remains rotating in the opposite direction until it stops ?? Q2) The second question: From your understanding of the Star / Delta control circuit, what happens in the following situation: Take the continuity from the NO contactors of the Delta contactor instead of taking it from the main contactor. Q3) As a control engineer, he gave you an engine that has the following nominal plate, specify all operating methods for this engine and determine which one you prefer to use with the cause ? CE GRUNDFOS EFF 2 TYPE MMG1325-2-38FF265-ECAT.NO. 340333060 PART NO. 83315217 5.5 kW LW 50-80 dB(A) MAX.AMB. 40 °CINS.F CONNA ENCL. IP55 EFF.(100%FL) 85.7% EFF.(75%FL) 86% HZ 50 HZ 60 DUTY S1 TP111 VOLT. 380-415A/660-6904 VOLT. 380-4801/660-690 WGT. 66 kg AMP. 11/6.4 AMP. 10.5-8.6/6.1-5.0 R.P.M. 2900-2920 R.P.M. 3470-3525 COS 0.89-0.86 COSY 0.92-088 W2-02-V2 BRG.D.E. 6208ZZ N.D.E. 6208ZZ YEAR 2001 WEEK 28 SER.NO.0001 MADE IN CHINA 6314 O Δ (v2) UI) (vi) (w 01 (1) W

Answer 1

1. Ans
   Custc POWER CIRCUIT www CONTROL CIRCUIT FORWARD REVERSE CIRCUIT using Above- 5HP/moros-AC R-phase. Y B-30 PHASE EE MCB 20 Amp I CONTACTOR MAIN CONTATOR 13 13 23 single Phase NO NO 14 24 R MP CBAT MPCB-9-14 Amps supply NO 21 230VIAC Inindia 5042 It R. 22 22 NC-Tz 21 NC Two (Normally open) No-Ti-Timer point No point ΑΙ ΑΙ NC-T2-Time-NC M] NI R (Normally close pont) A2 F Forward contacto Reverse Contacton. AI ច A2 A2 Neutral DELTAL CONTACTOR, MOTOR STAR CONTATOR "AC T-Timer-o-1 min MOTOR NAME E PIATE DETAILS Push Button Emergency kw-5.5kw. 7.5 HP F Forward Push Button Rpm, 2900-2920 R Reverse Push Button H2-50-60 Main Contactor wil-230VACCIndia) Conractor E Forward Contractor 123-NO Normal- open in contacton, 233 - 323-NC - Normal close in contact m- 5042 R- Reverse NO 3 5 11 12 13 14 15 16 17 18 19 20 21 22 23 24 215 26 27 28 210 3