GAUGE AS-OIL LEVEL (DIPSTICK) 2508304 - Caterpillar

Operation Of Generator
SRCR GENERATOR WIRING DIAGRAM A1 Regulator AssemblyA2,3,4 Suppression AssembliesC1 Surge CapacitorC2,3 Suppression CapacitorC4,5,6 RFI Suppression CapacitorsCR1,2 Control RectifiersCR3,4 Power RectifiersCR5 Field RectifierCR6 Build-up DiodeCR7,8 Surge Suppression DiodesCR9 Blocking DiodeE1,3 SCR Heat SinkE2,4 Rectifier Heat SinkE5 Field Rectifier Heat SinkF1,2 FusesK1 Build-up RelayL1 Filter ReactorL2 Sensing ReactorL3 Revolving FieldL4 StatorL5 Suppression ReactorL6,7 SCR ReactorL8 Diode ReactorR1 Regulator Gain ResistorR2 Regulator Gain PotentiometerR3 Voltage Droop PotentiometerR4 Voltage Level PotentiometerR5 Resistance WireR6 Surge ResistorR7 Damping ResistorT1 Isolation TransformerT2 Voltage Droop TransformerT3 Regulator TransformerTB1,2 Terminal BlockIntroduction
The Statically Regulated Controlled Rectifier 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.Generation Of Voltage
The generator is constructed with the armature coils wound on stator (L4) and the field coils wound on the rotor, designated in the wiring diagram as revolving field (L3). The field coils are wound on magnetic steel that will retain a small amount of residual magnetism. The revolving field is connected directly to the engine flywheel through the generator shaft and coupling.As the engine turns revolving field (L3), a small amount of alternating current voltage is generated in stator (L4) by the influence of residual magnetism in the revolving field. A portion of this alternating current (AC) is rectified to direct current (DC) and this portion is directed back to the revolving field to increase its magnetism. The procedure of excitation can be traced on the SRCR Generator Wiring Diagram by following the path of AC power from stator (L4).The AC current from phases 1 and 2 flows through wires (3 and 22) to terminals (TB2-3 and TB2-4), through wires (35 and 36), fuses (F1 and F2), wires (61 and 59), suppression reactor (L5), wires (62 and 60) to heat sinks (E2 and E4). If controlled rectifiers (CR1 or CR2) have not received a gate signal to allow current to flow, the AC voltage charges the paralleled capacitors (C2 and C3). When a gate signal is received at either controlled rectifier (CR1 or CR2), current will flow from heat sink (E2 or E4) through the SCR reactor (L6 or L7) and the associated controlled rectifier to heat sink (E5).The current flows from heat sink (E5) through regulator gain resistor (R1), wire (30) to terminal (TB2-1); through wire (C1) to