由于只用到暂态零序电流量，该选线判据不受PT异常情况的影响，可以适用于任意方式的不直接接地系统。
For that the transient zero sequence currents are used only, the criterion is immune to the abnormity of the PT, and it can be applied to all kinds of the neutral indirectly grounded systems.
中性点不接地系统和中性点经消弧线圈接地系统统称为中性点不直接接地系统，广泛应用于铁路配电系统中。
Non-ground neutral system and arc-suppression-coil-ground neutral system are called non-direct ground neutral system that is widely used in power distribution system.
相对于中性点非直接接地系统而言，发生在中性点直接接地系统中的铁磁谐振过电压有着许多新的特点，而且对它的研究相对较少。
Compared with neutral ungrounded power system, ferroresonance overvoltage occurred in neutral grounded power system has more new features, and the research about it is much.
介绍变压器中性点直接接地和不接地系统中人身触电电流的计算方法。
This paper introduces the calculating method of person shocking current in the sysytem of power supply of neutral dot directground connection and not ground connection.
介绍变压器中性点直接接地和不接地系统中人身触电电流的计算方法。
This paper introduces the calculating method of person shocking current in the sysytem of power supply of neutral dot directground connection and not ground connection.
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