Technalogix TAVD-500, Руководство пользователя

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Technalogix Ltd TAVD-500 Transmitter
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. The power supply is set at 30.0 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.
The (2) power supplies found in the power supply enclosure are Mean Well RSP-1500-27. 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 the power supply enclosure via a filtered AC entry and then through a circuit
breaker.