California Instruments 2750L-P Series Instruction Manual
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Contents
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INSTRUCTIONAL MANUAL 2750L-P/4500L-P/6000L-PAugust, 2001 Rev. K-105-SECTION 5 THEORY OF OPERATION5.1 GENERALAn explanation of the circuits within the AC Power System is given in this section. Refer to Figure 5-1 for a blockdiagram of the AC Power System.5.2 OVERALL DESCRIPTIONInput power from the rear panel is routed through the circuit breaker to the Input Power Supply (A5). DC voltages fromthe Input Power Supply are routed to the Power Mother Board (A4), the Control Mother Board (A8) and the AuxiliaryPower Supply (A7).The Programmable Oscillator assembly (A11) generates the oscillator waveforms and power source control andmeasurement signals. The oscillator assembly is connected to the rest of the power source through the Control MotherBoard, A10.The three amplifier modules are A1, A2 and A3. They take their DC supply voltages and input signal from the PowerMother Board, A4. They produce the high power outputs for the primary of the output transformers, T1, T2 and T3.The outputs are routed through the Power Mother Board to the output transformers.The Range Relay Board is identified as A6. This board assembly configures the secondaries of the output transformersfor the correct output voltage range. The outputs from the AC Power System are taken from the Range Relay Board.This board also has relays that switches the output to the 1-phase mode and opens the outputs. There is also a circuiton the board that senses for incorrect sense line connections.The board assemblies are described in more detail in the following paragraphs.5.3 INPUT POWER SUPPLYThis assembly is identified as A5. It generates the high power +300 VDC supply. This supply voltage is connected tothe filter capacitor, C1, and to the Power Mother Board. C1 is mounted on the bottom cover of the AC Power System.The Input Power Supply also has circuits that generate the DC voltages identified as +18V, +15VSW, +8VSW and +8V.The +18V supplies are used for the Oscillator Module and the Current Limit Board. The +8V supply is used for theOscillator Module. The +15VSW supplies are used for the three Amplifier Modules. |
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This manual is suitable for:
12000L-1P12000L-3P12000L/2-112000L/2-313500L/3-113500L/3-1P13500L/3-313500L/3-3P18000L/3-118000L/3-327000L/6-127000L/6-1P27000L/6-327000L/6-3P2750L-12750L-1P2750L-32750L-3P2750L-P Series4500L-14500L-1P4500L-34500L-3P4500L-P Series6000L-16000L-1P6000L-36000L-3P6000L-P Series9000L/2-19000L/2-1P9000L/2-39000L/2-3P
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