| 摘要 |
PURPOSE: An improved potential transformer(PT) terminal block is provided to prevent waiting until it is no longer power input by not separating an existing terminal in a phase voltage additional connection operation. CONSTITUTION: Two connection terminals input and output an A phase. Two connection terminals input and output a B phase. Two connection terminals input and output a C phase. Two connection terminals input and output an N phase. A plurality of branching connection terminals respectively branch the A phase, the B phase, the C phase and the N phase. The connection terminals are located on a terminal block body. [Reference numerals] (AA) Improved PT terminal block(connection state during phase addition); (BB) B-phase addition; (CC) C-phase addition
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