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TBP过电压保护器防护性能
新型三相组合式氧化锌过电压保护器(以下简称TBP过电压保护器)。是国内自前生产的一种新型组合结构。
New three-phase combined zinc oxide overvoltage protector (hereinafter referred to as TBP overvoltage protector). It is a new type of combination structure produced in China.
CG 为串联的放电间隙,FR 为氧化锌非线性电阻器。这种TBP过电压保护器在结构上为带串联间隙式,在接线方式上有较大突破,不似以往的Y接线方式。以往的 Y接线方式均是把中心点直接地,而TBP过电压保护器是在Y接线的中心点上再串联一只ZnO元件后接地。这从技术面上看确有较大改观,它使得不论是相对地还相与相之间看进去,均有两只ZnO元件串联,因此,只要在技术特性上保证相对地的放电特性与高压电动机的绝缘相配合,那么就能做到相对相的放电特性与高压电动机绝缘相配合;也就是说,这种TBP过电压保护器相对地的放电特性和相与相之间的放电特性,对高压电动机的绝缘,在防护性能上是一致的,归纳它的特点如下:
CG is a series discharge gap and FR is a zinc oxide non-linear resistor. This TBP over-voltage protector is structurally of series gap type and has a great breakthrough in connection mode, unlike the Y connection mode in the past. Previous Y-connection methods are to connect the center point directly, while TBP overvoltage protector is grounded by connecting a ZnO element in series at the center point of Y-connection. This is a great improvement from the technical point of view. It enables two ZnO elements to be connected in series regardless of the relative phase and phase. Therefore, as long as the discharge characteristics of the relative ground are matched with the insulation of the high voltage motor, the discharge characteristics of the relative phase can be matched with the insulation of the high voltage motor; that is to say, the TBP overvoltage protector can be used. The relative ground discharge characteristics and the discharge characteristics between phases are consistent in the protection performance of the insulation of the high voltage motor. Its characteristics are summarized as follows:
4.1 这种TBP过电压保护器是有间隙的氧化锌避雷器一类,因间隙的存在,则不论是正常运行还是单相接地故障,只要过电压不超过TBP过电压保护器的动作电压,TBP过电压保护器里是不流过电流的,这时它是荷电率为零,延缓了元件的老化问题,提高了可靠性。
4.1 This TBP overvoltage protector is a kind of zinc oxide arrester with gap. Because of the existence of gap, whether it is normal operation or single-phase grounding fault, as long as the overvoltage does not exceed the action voltage of TBP overvoltage protector, there is no overcurrent in TBP overvoltage protector. At this time, it has zero charge rate, delays the aging of components, and improves reliability.
4.2 因间隙的存在,故U1mA可以做得很低,10KV过电压保护器 U1mA=16.5KV、6KV U1mA=10.5KV。所以TBP过电压保护器的操作冲击残压值远低于同类产品在相同冲击电流下的残压值。
4.2 Because of the existence of gap, U1mA can be made very low. 10KV overvoltage protector U1mA = 16.5KV, 6KV U1mA = 10.5KV. Therefore, the operating impulse residual voltage of TBP overvoltage protector is much lower than that of similar products under the same impulse current.
4.3 由于特殊结构,可将相间过电压大大降低,与常规氧化锌避雷器相对,相与相之间过电压下降了至少60~70%,可靠地保护了被保护的电气设备。
4.3 Because of the special structure, the inter-phase overvoltage can be greatly reduced. Compared with the conventional zinc oxide arrester, the inter-phase overvoltage can be reduced by at least 60-70%, which can reliably protect the protected electrical equipment.
5 结语
5 Conclusion
对于TBP过电压保护器的组合式结构所带来的优良特性是无可非议的,但因TBP过电压保护器保护间隙的存在,使得它与常规带间隙的ZnO避雷器一样,引起了人们的异议:
There is no doubt that the combined structure of TBP overvoltage protector brings about excellent characteristics, but because of the existence of the protection gap of TBP overvoltage protector, it causes people's objection as well as the conventional zinc oxide arrester with gap.
5.1 因间隙的存在,则操作过电压、工频暂态过电压等只要不在幅值上超过TBP过电压保护器的动作电压,则对ZnO阀片是不产生影响的、可靠性似乎提高了,但同时却把氧化锌避雷器所具有的良好的非线性特性、过电压能量吸收力强、响应特快等一系列优点抛弃了。

5.1 Because of the existence of gap, as long as the operating overvoltage and power frequency transient overvoltage do not exceed the operating voltage of TBP overvoltage protector in amplitude, tianchuangd.89ix.comtianchuang.89ix.comtongfengqiw.89ix.comtongfengqi.89ix.comchuanxian.89ix.com

pvcguanjian.89ix.comthe reliability of the zinc oxide arrester seems to be improved, but at the same time, a series of advantages of the zinc oxide arrester, such as good non-linearity, strong energy absorption of overvoltage and fast response, are discarded.

5.2 间隙的存在,使ZnO阀片限制内过电压及大气过电压的积极作用,也荡然无存。
The existence of 5.2 gap makes the positive role of ZnO valve disc in limiting Internal Overvoltage and atmospheric overvoltage disappear.
5.3 过去带间隙的碳化硅避雷器,因受潮而使其放电电压不稳定,这种缺点TBP过电压保护器上也依然存在。
5.3 In the past, the discharge voltage of silicon carbide arrester with gap was unstable due to damp, which still existed on TBP overvoltage protector.

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