接地系数是故障时最大持续相电压与最大运行线电压之比。
The coefficient of grounding is the ratio of the maximum sustained line-to-ground voltage during faults to the maximum operating line-to-line voltage.
为了获得高的灵敏度，本设计采用了噪声系数很低的前置放大器，并进行了可靠的接地、屏蔽等处理。
To achieve high sensitivity, the pre-amplifier with very low noise figure is adopted in the design, and reliable grounding and shielding processing are performed.
采用垂直接地极能减小接地系统的季节系数，起稳定接地系统安全性能的作用。
Adding vertical rods to grounding system will decrease the seasonal coefficient and stabilize the safety of grounding system.
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