DIGITAL PROTECTING AND CONTROLLING DEVICE

Japanese Patent JP3930394

B2

PROBLEM TO BE SOLVED: To provide a digital protecting and controlling device wherein data transmission within equipment is carried out with efficiency and thus protecting and controlling capabilities are enhanced.
SOLUTION: The digital protecting and controlling device comprises a digital data consolidating means coupled with a sensor unit by a communicating means, a protecting and controlling means, a communicating means for an equipment controller connected with the equipment controller by a communicating means, and a process bus communicating means. At least some of these means are coupled with each other through a parallel transmission medium, and at least part of data transmission is carried out by a multimaster method. By adopting multimaster transmission, each means can independently send and receive data, and the imbalance of a communication load can be reduced. This reduces the possibility that data bus processing is concentrated to a specific means, and thus the time response of the operation of the entire digital protecting and controlling device is degraded.

JPS6022569	[Title of the Invention] Grounded type voltage transformer device
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JPS6099836	[Title of the device] The reactor which decreases zero-phase residual voltage

Yuji Minami
Kizen Suga
Hiromi Nagasaki
Masayuki Kosakada

JP2002229102A

June 13, 2007

August 06, 2002

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Toshiba Corporation

H02H3/02; G05B19/418; H02H1/00; H02J3/00; H02J13/00; (IPC1-7): H02H3/02; H02J3/00; H02J13/00

JP2002152972A
JP1202113A
JP63305715A
JP2000029822A
JP63053652A
JP63080634A
JP2002131366A

Saichi Suyama

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