x CONTENTS 



PAGE 



150. Comparative Ratings of an Alternator Wound Single-, Two- and 



Three-phase. 



151. Armature Reaction. 



152. Armature Reactance. 



153. Polyphase Armature Reaction. 



154. Single-phase Armature Reaction. 



155. Electromotive Forces in the Alternator. 



156. Vector Diagram of E.m.f.'s and M.m.f.'s. 



157. Determination of the Synchronous Impedance. 



158. Voltage Characteristics. 



159. Compounding Curves. 



160. Short-circuit Currents of Alternators. 



161. Single-phase Short Circuits. 



162. Synchronous Motor. 



163. Vector Diagrams. 



164. Characteristic Curves. 



165. Compounding Curves. 

 WQ. Load Characteristics. 



167. Phase Characteristics. 



168. Synchronous Compensators. 



169. Starting. 



170. Parallel Operation of Alternators. 



171. Effect of Inequality of Terminal Voltage. 



172. Effect of Inequality of Frequency. 



173. Effect of Difference of Wave Form. 



174. Hunting. 



175. Automatic Voltage Regulator for Alternating-current Generators. 



176. Synchroscope. 



CHAPTER VI. 



TRANSFORMERS 290 



177. The Constant-potential Transformer. 



178. Vector Diagrams for the Transformer. 



179. Exciting Current. 



180. Leakage Reactances. 



181. Vector Equations of the Transformer. 



182. Examples. 



183. Measurement of the Impedance of a Transformer. 



184. Voltage Characteristics. 



185. Regulation. 



186. Losses in Transformers. 



187. Hysteresis Loss. 



188. Eddy Current Loss in Transformer Iron. 

 180. Efficiency. 



190. Types of Transformers. 



191. Methods of Cooling. 



192. Transformer Connections. 



193. Single-phase Transformers on Polyphase Circuits. 



194. "Open Delta" or "V" Connection. 



195. Transformation from Two-phase to Three-phase. 



196. Series Transformer. 



197. Auto-Transformer. 



198. The Constant-current Transformer. 



199. Induction Regulator. 



CHAPTER VII. 



INDUCTION MOTOR 324 



200. Induction Motor. 



201. The Stator. 



202. Revolving M.m.f. and Flux of the Stator. 



