| 摘要 |
<p>PURPOSE:To provide precise measurability for the secondary current of a current transformer by connecting a bunch of serially connected resistors to the output side of the current transformer, and equipping each resistor with a sensor to sense the output from the ends of the resistor. CONSTITUTION:Each voltage Vi generated at the ends of each resistor 21, 22, 23..., 2n in series connection is expressed as Vi=I2XR2iXR3i/(R2i+R3i), where I2 is secondary current of a current transformer 1, R2I is each resistance value of resistor 21, 22, 23..., 2n, and R3i is input resistance value of each sensor 31, 32, 33..., 3n, wherein (i) takes 1 thru n. Accordingly the sensors 31, 32, 33..., 3n will measure the secondary current of the current transformer 1 through sensing of the voltages Vi, and eventually removed sensor does not affect the other sensors, which permits precise measurement of the transformer secondary current.</p> |
