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888-2408-002
WARNING: Disconnect primary power prior to servicing.
Overall System Theory
4.5.2.2.6 16VCT, V+SCR Supply
The 16VCT secondary winding is fused by F3 and F4 on the Rectifier Board. These
are self-resetting fuses which physically look like disc capacitors. The AC is
rectified by CR10 and CR11 and becomes V+SCR which is the gate drive signal for
the tap and soft start SCRs.
4.5.2.2.7 Heat Sink Temperature
The temperature of the rectifier heatsink is monitored by Thermistor, RT1. A fault is
triggered if the temperature of the rectifier heatsink exceeds 100°C and the power
supply will be shut off. This temperature can be monitored in the Status Menu of the
Diagnostics Display. If the thermistor is shorted, the temperature reading will be
about 155°C and the supply shut off. If it is open it will cause a Thermistor Fault to
show up in the fault log.
4.5.3
Power Supply ID Jumpers
The 3 Phase and Single Phase supplies both have ID jumpers which are set to
designate the power supply as PS1 or PS2. This lets the PS Controller know which
power supply it is connected to, for proper reporting to the Master Controller. The
PS Controller will not allow 2 IDs to be the same. The jumper configurations are
given below: These jumpers are located on the Rectifier Boards on both the 3 Phase
and Single Phase supplies.
4.5.4
Low Voltage Power Supply Board
The AC input for this board is dependent on the AC voltage and configuration for
the transmitter, 3-phase Delta (3 wire), 3-phase WYE (4 wire) or single phase. The
same board is used in all three cases. The AC inputs to the board come from circuit
breaker, CB1, and enter the board at J1-1 and J1-4. For the 3-phase Delta and Single
Phase J1-1 is Phase A and J1-4 is Phase B (Phase C for the 3-Phase does not
connect to this board). For the 3-phase 4 wire WYE J1-4 is Phase B and J1-1 is the
Neutral.
Transformer T1 has dual full wave rectifiers. The T1 secondary outputs are fused by
F3, F4, F5 and F6, and are then full wave rectified for two DC outputs of +10Vdc.
The +10Vdc is filtered by C1-C6 and connected to the rectifier boards, on top of the
PA power supply transformers, in the bottom of the transmitter. Transformer T2
secondaries are fused by F7, F8, F9 and F10 before going to dual bridge rectifiers.
The rectifier outputs are filtered by C7-C10 and 20Vdc and -20Vdc to the
PS #1
PS #2
JP1
IN
OUT
JP2
OUT
IN
JP3
OUT
OUT
Содержание Z5 CD
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Страница 20: ...1 6 888 2408 002 WARNING Disconnect primary power prior to servicing Introduction Specifications...
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Страница 193: ...888 2408 002 7 1 WARNING Disconnect primary power prior to servicing Parts List 7 1 Part List Index...
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