(JP9284981-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.    (JP9284983-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.    (JP9284996-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.    (JP9285003-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.    (JP10000990-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.    (US5936317-A)      Current is fed from the vehicle 12V battery (B) to a load (L) through a power supply unit (101) and a short detecting cable (102). The power supply unit comprises a circuit breaker (103), a breaker drive circuit (104), a microcomputer (105) and voltage monitor circuits (106,107). A P-channel FET may be used as the circuit breaker.    The voltage monitor circuits include comparators (108,109). The microcomputer receives signals from the monitor circuits and checks an abnormality in the battery to load circuit on the basis of the output signals. When the microcomputer detects an abnormality an output signal (LO) is generated for the breaker drive circuit to turn off the circuit beaker.    ADVANTAGE -   Prevents wire burn out by detecting rare short as well as a full short.