Title:
An insulation resistance monitoring instrument and a detection voltage estimation method
Document Type and Number:
Japanese Patent JP6101322
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve a problem such that it takes time for a voltage to become stable due to a transient current caused by ground capacitance in an insulation resistance monitoring device for switching a shunt resistor to measure a flowing electric current.SOLUTION: Arithmetic means includes a transient phenomenon arithmetic section. The transient phenomenon arithmetic section obtains the time constant of a positive electrode side and the time constant of a negative electrode side from the amount of change of a transient phenomenon when a voltage-dividing ratio is changed by switching a shunt resistor by switching means. A final voltage is calculated from obtained each time constant when the transient phenomenon is terminated. The arithmetic section of the arithmetic means is configured to calculate a positive electrode side insulation resistance and a negative electrode side insulation resistance from the final voltage when the transient phenomenon calculated by the transient phenomenon arithmetic section is terminated.SELECTED DRAWING: Figure 1
Inventors:
Takuro Kazama
Application Number:
JP2015167313A
Publication Date:
March 22, 2017
Filing Date:
August 27, 2015
Export Citation:
Assignee:
Kosho Corporation
International Classes:
G01R31/02; H02H3/16
Domestic Patent References:
| JP5514842B2 | ||||
| JP2008139249A | ||||
| JP2002207060A | ||||
| JP1127973A |
Foreign References:
| US20110140714 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Uzawa Hidehisa
Uzawa Hidehisa
Previous Patent: The water fire-resistant paint constituent for building-materials side paint
Next Patent: FITTING STRUCTURE OF PANEL FOR CONSTRUCTION
Next Patent: FITTING STRUCTURE OF PANEL FOR CONSTRUCTION