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注流试验法和试验结果注入电流所使用的试验设备同测量一般接地电阻所用的设备一样。它由接在变电所440V CFS配电盘上的440V/240V变压器供电。然后通过可调变压器给240V/10V变压器供电,这就控制了注流变压器的输入电压。注流变压器的最大输出电压一般约为10V。该输出电压为浮动值,它被加到矿山接地线与一个周围岩石接地线之间。从而有电流注入矿山接地线(图4)。接到周围岩石的局部连接,通常由一些岩石锚杆组成,这些锚杆由电缆并联连接起来。这就构成了一个较好的接地网,并可在同样输出电压情况下,注
Flow Injection Test Method and Test Results The test equipment used to inject the current is the same as that used to measure the normal earth resistance. It is powered by a 440V / 240V transformer connected to the 440V CFS panel in the substation. The adjustable transformer is then used to power the 240V / 10V transformer, which controls the input voltage to the current transformer. Note that the maximum output voltage transformer flow is about 10V. The output voltage is a floating value, which is applied between the mine ground and a surrounding rock ground. Thus current is injected into the mine ground (Figure 4). Local connections to the surrounding rock, usually made up of rock bolts, are connected in parallel by cables. This constitutes a good grounding grid, and in the case of the same output voltage, note