保定奥兰电气科技有限责任公司

本装置是以高能氧化锌压敏电阻为核心元件，经过科学的有机搭配，使每一路压敏电阻的伏安特性完全相同，再经过并联，从而构成一个巨大的非线性压敏电阻，在组装时采用特殊的散热工艺，使本装置的容量极大，因而可以将其动作值设置在系统的相电压左右，并直接连接在系统中性点对之间，作为系统的接地电阻使用。     因氧化锌压敏电阻具有非常优异的非线性，在系统正常运行时呈高阻状态，通过其中的电流非常小，相当于开路状态，这时系统为非有效接地方式，具有很高的供电可靠性；不论何种原因，当系统发生谐振、接地或其它原因产生过电压时，都会在系统的中性点产生较高的电压，压敏电阻产即响应，将过电压限制在设定的范围内，这时压敏电阻呈小电阻状态，相当于低阻接地，并且电流在很大的范围内变化，而压敏电阻两端的电压基本保持不变，具有优异的过电压保护性能，因此又具备了低阻接地系统的优点。

The device uses high-energy Zinc Oxide varistor as the core component, after the organic collocation of science, so that each volt ampere characteristics of varistors are exactly the same, then after parallel, thus forming a huge nonlinear varistor, the cooling process in special assembly, make the device capacity greatly, which can be the action value set in the phase voltage system, and is directly connected to the neutral point of the system, as the use of grounding resistance system. Because Zinc Oxide varistor has very excellent nonlinear, in a high impedance state when the system is in normal operation, through which the current is very small, the equivalent of the open state, then the system is non effective grounding mode, power supply reliability is very high; for whatever reason, when the system resonance occurs, earthing or other reasons over voltage, will produce high voltage in the neutral point of the system, which will produce varistor response, overvoltage in the range, then the pressure sensitive resistance is low resistance state, the equivalent of low resistance grounding, and the current changes in a large range, and the two ends of the varistor voltage remained the same, with overvoltage protection with excellent properties, and therefore it has the advantages of low resistance grounding system.