METHOD FOR CALIBRATION OF AUTOMATIC SWITCHES WITH HEAT CIRCUIT-BREAKERS WITHOUT CURRENT Russian patent published in 1997 - IPC

FIELD: electric engineering. SUBSTANCE: method involves rotation of regulating members to angle which conform specific equation until automatic switch which is not connected to current is switched off. Then regulation members are turned back to specific angle which depends on type and nominal current of given automatic switch. Said angle is equal to , where α_ll is lower limit of regulation member for lower tolerance dependency of firing time on position of regulation member for non-switching current I_o= 1,05I_n (I_n is nominal current of automatic switch); α_ul is upper limit of regulation member for upper tolerance dependency of firing time on position of regulation member for switching current I₁= 1,25I_n or I₁= 1,35. EFFECT: increased field of application, arbitrary design of switch and arbitrary heating type of heat-sensitive elements. 2 cl, 1 dwg