초록 ▼

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals represent

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals representing the electrical current flow through the monitored circuit and broadband noise signal components. The system analyzes these signals to determine whether an arcing fault is present, and if so, outputs a trip signal which may be used directly or indirectly to trip a circuit breaker or other circuit interruption device.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of determining whether arcing is present in an electrical circuit comprising:sensing current in said circuit and developing a corresponding first signal;analyzing said first signal to determine the presence of broadband noise in a predetermined range of frequen

[ What is claimed is:] [1.]1. A method of determining whether arcing is present in an electrical circuit comprising:sensing current in said circuit and developing a corresponding first signal;analyzing said first signal to determine the presence of broadband noise in a predetermined range of frequencies, and producing a corresponding second signal; andprocessing said first signal and said second signal to determine current peaks, and to determine, using said current peaks and the presence of broadband noise, whether an arcing fault is present in said circuit by comparing data corresponding to said current peaks and broadband noise with preselected data indicative of an arcing fault.