3 PHASE GROUP MEASURING DEVICE HAVING INDEPENDENT MEASURING STRUCTURE FOR EACH PHASE

摘要

PURPOSE: A 3 phase measuring group including a measuring structure by each independent phase is provided to maximize the flexibility of the composition of a measuring system by corresponding to an electricity power line of various intervals and a molded case circuit breaker (MCCB) of various ratings. CONSTITUTION: A non-representative single hole measuring device (100(N)) penetrates an electricity power line of a first phase by being installed in the electricity power line of the first phase. The non-representative single hole measuring device senses a current flowing in the electricity power line of the first phase and generates the first current data with analog and digital conversion. The non-representative single hole measuring device transmits the first current data with digital communication. A representative single hole measuring device (100(R)) penetrates an electricity power line of a second phase by being installed in the electricity power line of the second phase. The representative single hole measuring device senses the current flowing in the electricity power line of the second phase and generates second current data with the analog and digital conversion. The representative single hole measuring device receives the first current data with digital communications and generates third current data on current flowing in an electricity power line of a third phase. [Reference numerals] (330) Ethernet; (AA) Substitution figure A; (BB) Three-phase four-line three-device; (CC) Three-phase three-line two-device