Power supply apparatus for field devices

Details Power supply apparatus for field devices Power supply apparatus for field devices

2006-12-14

2009-08-11

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Plural load circuit systems

Selectively connected or controlled load circuits

C307S113000

Reexamination Certificate

active

07573153

ABSTRACT:
An apparatus for supplying DC power to a field device, such as a motor, starter or actuator, includes a multi-pole main switch and a DC voltage supply device, both of which are connected at their respective AC-voltage input sides to a line voltage via a line protection. The DC-voltage side of the DC voltage supply device is connected via a two-pole switch to respective lines of the same power cable that connects output terminals of the apparatus to the field device. The multi-pole main switch and the two-pole switch are ganged. This approach eliminates a separate DC power cable between the apparatus and the field device.

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Lasttrennschalter 3KL, 3KM, 3KA, 3KE, in: Siemens Niederspannungs-Schalttechnik-Katalog NS K 1999/2000, Kapitel: Schaltgeräte zur Energieverteilung, Seite 12/34-12/35.

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