Technalogix TAV-1000, Manual

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V-1
Section V – Power Supply
Switching AC-DC power supplies are used to power the amplifier pallets, the control circuits, and all of the fans.
There is one power supply located in each power amplifier enclosure to generate the necessary current for the
amplifier pallets. These (2) supplies are set at 31.0 Vdc nominally. All fans run off this same supply, though they
pass through a series dropping resistor to lower the supply voltage, as the fans are 24Vdc.
A 24Vdc nominal power supply is located in the combiner enclosure. It simply supplies power to the control
PCB and the cooling fan.
The power supplies in the power amplifier enclosure are Mean Well PSP-1500. The power supply found in the
filter enclosure is a Mean Well S60-24. The switching power supplies are fully protected against short circuit and
output overload. Short circuit protection is a cycling type power limit. The internal AC fuse is designed to blow
only on a catastrophic failure in the unit – the fuse does not blow on overload or short circuit. The thermal
shutdown automatically recovers when the power supply chassis cools down.
AC (220Vac) is fed into each power amplifier enclosure via a filtered EMI AC entry and then through a resettable
circuit breaker. The AC for the combiner enclosure (110Vac) is also fed through a filtered EMI AC entry. It is
then current limited with a resettable circuit breaker before passing through a rocker switch. This switch turns
the AC on and off to the switching power supply.