Guarding implies the use of an added low impedance conductor, maintained at the same potential as the high impedance circuit, which will intercept any interfering voltage or current.

而保护意味着使用保持在与高阻抗电路相同电位的附加的低阻抗导体来阻止可能的干扰电压或电流。

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The harmonic problems, such as distorting supply voltage, decreasing power factor, increasing energy loss, interfering with communication systems etc. are discussed in the part one.

第一部分讨论各种谐波问题，如使供电电压畸变，降低功率因数，增加能量损耗，干扰通讯系统等。

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Randal Gilbert from NIE said interfering with high voltage electricity could be lethal.

BBC: Vandalised substation

There is live high voltage equipment inside, and interfering with it can be unforgiving.

BBC: Belfast vandals leave 6,000 without electricity