TURBOCHARGER 3166972 - Caterpillar

Identification
TYPICAL SRSE REGULATOR
1. Exciter reactors.All Statically Regulated Statically Excited (SRSE) generators have three large exciter reactors as a part of the regulator assembly.The generator serial number, on the nameplate, tells four things about the generator:1. The first group of numbers is the approximate kW rating on 60 cycle generators. On 50 cycle generators it is usually one less than that for 60 cycle generators.2. The letter S is the symbol for Caterpillar Statically Regulated Statically Excited generator.3. The next letter gives an indication of the voltage rating. See chart. 4. The last group of numbers is the actual serial number of the generator in its kW and voltage rating. If a generator is connected to give performance different from that shown on the nameplate, a new nameplate should be installed on the generator. Mark the new nameplate to show the present method of connection and rated capacities.The chart that follows gives the basic characteristics of each SRSE generator. Principles Of Operation
SRSE 240-480 VOLT GENERATOR WIRING DIAGRAM A. Voltage droop transformer.B. Voltage droop control switch.C. Saturable reactor.D. Full wave rectifier.E. Stator.F. Rotating field.H. Voltage level resistor.J. Voltage level rheostat.N. Power rectifier.P. Heat sink.Q. Voltage control choke.R. Exciter reactor.R. Trimmer resisitor.T. Trimmer choke.U. Relay N.C.The Statically Regulated Statically Excited Generator gives improved performance and longer service life by applying a method of excitation which is controlled by an automatic voltage regulation system that contains no moving parts. The generator voltage buildup system uses only one moving part; a relay, which operates only when the generator is started or shut down.The generator is constructed with the armature coils wound on the stator (E) and the field coils wound on the rotor, designated in the wiring diagram as the rotating field (F). The field coils are wound on magnetic steel that will retain a small amount of residual magnetism. The rotating field is connected directly to the engine flywheel through the generator shaft and coupling.As the engine turns the rotating field, a small amount of AC voltage is generated in the stator by the influence of the residual magnetism in the rotating field. This AC voltage is directed to the power rectifier (N) which changes it to DC voltage. The DC voltage is then applied to the rotating field, through brushes and collector rings. The DC voltage, when applied to the rotating field, produces a magnetic field which adds its strength to the residual magnetism in the rotating field. As the field strength increases, higher voltage is generated by the stator. This process of increasing voltage builds up to the rated voltage, at which point the voltage is limited by the exciter reactors (R) placed in series with the stator, the power rectifiers and the rotating field.Each exciter reactor (R) has four separate coils wound around a common iron core. The "H" and "Z" coils have magnetic polarity in one direction