Title:
HIGH VOLTAGE POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2017184449
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To apply effective explosion-proof treatment to a part of a high voltage power supply device becoming an ignition source.SOLUTION: A grounding switch 223, low voltage terminals Ta and Tb, and insulation oil are the parts becoming an ignition source, and an oil tank 221, a protection duct 222, a low voltage terminal box 224, and a ventilation internal pressure box 227 are a sealed box for sealing the parts becoming an ignition source. In order to prevent intrusion of flammable gas into the sealed box, a first inert gas enclosure 301 encloses inert gas GN in the oil tank 221, and an inert gas supply section 302 encloses inert gas GN in the protection duct 222. A blower 303 encloses air A, containing inert gas GN, in the ventilation internal pressure box 227. A coupling 225 prevents a gap from occurring in the power supply cable lead-in port of the low voltage terminal box 224. The low voltage terminals Ta and Tb are placed while spaced apart by a predetermined distance for keeping insulation.SELECTED DRAWING: Figure 3
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Inventors:
HASEGAWA YUKIHIRO
ABE MASAMI
MIYAHARA MASAYUKI
ABE MASAMI
MIYAHARA MASAYUKI
Application Number:
JP2016068156A
Publication Date:
October 05, 2017
Filing Date:
March 30, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING ENG CO LTD
International Classes:
H02B13/045; B03C3/66; H02B1/16; H02B13/055; H02B13/075
Domestic Patent References:
| JP2005019791A | 2005-01-20 | |||
| JPS6230386U | 1987-02-24 | |||
| JP2005019791A | 2005-01-20 | |||
| JPS6230386U | 1987-02-24 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi