Generator protection and control are inter-dependent problems. A generator has to be protected from various abnormal operating conditions. (i) List FOUR (4) abnormal operating conditions that a generator has to be protected. Discuss in detail each practical protection scheme used to protect a (ii) generator from the abnormal operating conditions listed in Q5(b)(i). respectively.

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Q1 (a) (b) Name and describe the features of the FIVE (5) types of generators. All generators are driven by a source of mechanical power, which is usually called the prime mover of the generator List FOUR (4) potential prime mover of DC generator.

B- 1 As the name implies, a 3-phase "dual-voltage motor" can be connected to one of two voltages. a) true b) false B-2  - A 3-phase dual-voltage motor may have_______leads. a) nine b) twelve c) either "a" or "b" d) neither "a" nor "b"  B-3-Which of the following mathematically represents the relationship between Ete phase and line voltages of a WYE connected 3-phase motor? a) EPHASE = ELINE ÷ 1.732 b) ELINE = EPHASE x 1.732 c) ELINE = EPHASE X√3 d) all of the above

Consider a loop of wire in a magnetic field below as well as the given commutators. The brushes of the commutators have a DC current passing through them and are connected to the wire loop. Solid Ring Commutator Half Ring Commutator Split Ring Commutator Part A The motor will work when the wire loop is connected to the [select all that apply] O split ring commutator O half ring commutator O solid ring commutator Submit Request Answer Part B For the commutators above, the most Torque would be produced by using the O solid ring commutator O half ring commutator O split ring commutator

Q3) In a long-shunt compund generator, the terminal voltage is 230 V, when it delivers 150 A. The shunt field series field, divider, and armature resistances are 92, 0.015, 0.03, and 0.032 ohm respectively. Determine : (i) induced emf? (ii) total power generated armature?

1. Core losses and rotational losses in a dc generator can occur even at no load conditions. a. True b.  False   2. Copper losses in a dc generator includes _____. a. Brush contact and armature winding losses b. Shunt field loss c. Core loss d. Shunt field loss, brush contact loss and armature winding loss   3. The series field in a series dc generator consist of _____ turns of _____ wires. a. heavy, few b. few, heavy c. heavy, heavy d. few, few   4.Discounting the voltage generated due to residual magnetism, the series generator can generate a fair amount of voltage even without load. a. True b. False   5. In a short-shunt compound dc generator, the shunt field circuit is connected in _____ to the _____ field/circuit. a. series, series b. parallel, series c. series, armature d. parallel, armature

Q3) In a long-shunt compund generator, the terminal voltage is 230 V, when it delivers 150 A. The shunt field series field, divider, and armature resistances are 92, 0.015, 0.03, and 0.032 ohm respectively. Determine : (i) induced emf? (ii) total power generated armature?

Q3) In a long-shunt compund generator, the terminal voltage is 230 V, when it delivers 150 A. The shunt field series field, divider, and armature resistances are 92, 0.015, 0.03, and 0.032 ohm respectively. Determine : (i) induced emf? (ii) total power generated armature?

(a) Draw the circuit schematic for a short-shunt cumulative compound DC generator with field current control. Label all components and terminals. Show all coils' and terminals' polarities using standard terminal letter/symbol identification.