Title:
熱動形過負荷保護装置のトリップ感度調整方法
Document Type and Number:
Japanese Patent JP4648434
Kind Code:
B2
Abstract:
A method for adjusting a trip sensitivity in a thermal overload protection apparatus so as to effectively set and adjust a trip operation current, comprising: setting an adjusting reference point; measuring a normal position of bimetals; measuring a moving distance at a time of trip operation of a trip latch mechanism; deciding an assembling position of a shifter mechanism based on the measured moving distance at the time of trip operation of the trip latch mechanism, information on a trip distance between a pre-determined shifter mechanism and the trip latch mechanism and information on a size of the shifter mechanism; conducting a predetermined over current to the thermal overload protection apparatus; measuring a conducting time of the overcurrent until a trip occurrence; calculating a difference between the conducting time measured in the measuring step and a predetermined trip time by converting a rotation angle; and marking a graduation of a set trip operation current by the rotation angle calculated in the calculating step.
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Inventors:
Songki-Bon
Application Number:
JP2008203528A
Publication Date:
March 09, 2011
Filing Date:
August 06, 2008
Export Citation:
Assignee:
LSIS CO.,LTD.
International Classes:
H01H61/00; H01H61/01; H01H61/013; H01H61/02
Domestic Patent References:
| JP200455437A | ||||
| JP200114999A | ||||
| JP51117161U | ||||
| JP3711324B1 | ||||
| JP5341724Y1 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shimichi Akihisa
Tomohiro Minamiyama
Yoshio Mizutani
Jun Tsuruta
Tetsuro Shimada
Shimichi Akihisa
Tomohiro Minamiyama
Yoshio Mizutani