ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H02H0003353000 involving comparison of phase voltages 1
H02H0003360000 involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems 1
H02H0003380000 responsive to both voltage and current; responsive to phase angle between voltage and current 1
H02H0003400000 responsive to ratio of voltage and current 1
H02H0003420000 responsive to product of voltage and current 1
H02H0003440000 responsive to the rate of change of electrical quantities 1
H02H0003460000 responsive to frequency deviations 1
H02H0003480000 responsive to loss of synchronism 1
H02H0003500000 responsive to the appearance of abnormal wave forms, e.g. ac in dc installations 1
H02H0003520000 responsive to the appearance of harmonics 1
H02H0005000000 Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection (using simulators of the apparatus being protected H02H0006000000; specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H0007000000) 1
H02H0005040000 responsive to abnormal temperature 1
H02H0005060000 in oil-filled electric apparatus 1
H02H0005080000 responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays 1
H02H0005100000 responsive to mechanical injury, e.g. rupture of line, breakage of earth connection 1