Title:
DIGITAL PROTECTIVE RELAY HAVING AUTOMATIC ADJUSTING FUNCTION
Document Type and Number:
Japanese Patent JPH06315221
Kind Code:
A
Abstract:
PURPOSE: To shorten the adjusting time by simplifying the adjustment and reducing the human error.
CONSTITUTION: When a predetermined signal is fed to an input transformer, a correction value based on the difference between the predetermined signal and a design value is stored in a correction value calculating circuit 57 and a signal inputted from a system is corrected at a correction circuit 56 based on the correction value. Consequently, an operator can make an adjustment by simply delivering a predetermined signal to a CPU and commanding the CPU to perform corrective operation.
Inventors:
UEDA TOYOKI
ODA SHIGETO
ODA SHIGETO
Application Number:
JP9939493A
Publication Date:
November 08, 1994
Filing Date:
April 26, 1993
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02H3/00; (IPC1-7): H02H3/00
Domestic Patent References:
| JPH0522833A | 1993-01-29 | |||
| JPS6257532U | 1987-04-09 | |||
| JPH02312408A | 1990-12-27 | |||
| JPS62254619A | 1987-11-06 | |||
| JPS52129946A | 1977-10-31 | |||
| JPH01180820U | 1989-12-26 |
Attorney, Agent or Firm:
Takada Mamoru