Circuit for indicating abnormality of three-mode surge absorber of public electric power

A circuit for indicating abnormality of a three-mode surge absorber of a public electric power serially connected to an input and an output end of a public power supply, said input end having a line input end, a neutral input end, and a ground input end;

• said output end including a line output end, a neutral output end, and a ground output end for indicating abnormalities of a three-mode surge absorber f a public electric power completely;
• said circuit for indicating abnormality of a three-mode surge absorber of a public electric power comprising:
• a) a first two-end fuse having a first end coupled to said line input end;
• b) a first surge absorbing device coupled to a second end of the first two-end fuse and said neutral input end for absorbing a surge between said line input end and said neutral input end;
• c) a second surge absorbing device coupled to said line input end and said neutral end;
• d) an abnormal indication circuit coupled to said first surge absorbing device, said second surge absorbing device and said neutral input end for indicating abnormalities in three-mode of a public power supply wherein said abnormal indication circuit includes:
• i) a diode having an anode coupled to a line output end;
• ii) a first resistor having a first end coupled to a cathode of said diode;
• iii) a second resistor having a first end coupled to said second end of said first resistor and a second surge absorbing device;
• iv) a first transistor having a base coupled to said second end of said second resistor, and having an emitter coupled to said ground input end;
• v) a third resistor having a first end coupled to said cathode of said diode;
• vi) a fourth resistor having a first end coupled to said first resistor, a first end of said third resistor, and said cathode of said diode, and having a second end coupled to said collector of said first transistor;
• vii) a fifth resistor having a first end coupled to said second end of said fourth resistor and said collector of said first transistor;
• viii) a second transistor having a base coupled to said second end of said fifth resistor, and having a collector coupled to said second end of said third resistor;
• ix) a surge protection indicating having an anode coupled to said emitter of said second transistor, and having a cathode coupled to said neutral output end;
• and
• x) a Zener diode having a cathode coupled to said collector of said second transistor, and having an anode coupled to said neutral output end;
• and,
• e) a second two-end fuse having a first end coupled to said second surge absorbing device, and a second end coupled to said ground input end.