電涌保護器名詞術(shù)語解釋

　　EXPLANATION OF SPD TECHNICAL TERM

　　電涌保護器 （SPD） surge protective device

　　用于限制瞬時過電壓和泄放電涌電流的電器，它至少包含一個非線性的元件。

　　The appliance used to limit transient over voltage and discharge the surging current, it includes one of non-linear element at least.

　　電壓開關(guān)型SPD voltage switching type SPD

　　沒有電涌時具有高阻抗，有浪涌電壓時能立即轉(zhuǎn)變成低阻抗的SPD。電壓開關(guān)型SPD常用的元件有放電間隙、氣體放電管、閘流管（硅可控整流器）和三端雙向可控硅開關(guān)元件。這類SPD有時也稱作“短路型SPD”。

　　SPD that it shows high impedance when there has no surging, and becomes low impedance while surging voltage occurs . Voltage switching type SPD generally composed of discharging gap, gas discharging tube, thyratron （silicone controllable rectifier） and three-ending bidirectional silicone switching element. Sometimes it also call “short circuit type SPD”

　　電壓限制型SPD voltage limiting type SPD

　　沒有電涌時具有高阻抗，但是隨著電涌電流和電壓的上升，其阻抗將持續(xù)地減小的SPD。常用的非線性元件是：壓敏電阻和抑制二極管。這類SPD有時也稱作“籍位型SPD”。

　　SPD that it shows high impedance when there has no surging, but the impedance will decrease gradually while surging current and voltage rise up. Common non-linear element: piezoresistance, and clamping diode, Sometimes it also call “Clamping SPD”

　　復(fù)合型SPD combination SPD

　　由電壓開關(guān)型元件和電壓限制型元件組成的SPD。其特性隨所加電壓的特性可以表現(xiàn)為電壓開關(guān)型、電壓限制型或兩者皆有。

　　SPD constructed of voltage switching and voltage limiting elements. The characteristics curve can take on the characteristics of voltage switching or limiting type, or both.

　　保護模式modes of protection

　　SPD 保護元件可以連接在相對相（L-L）、相對地（L-PE）、相對中線（L-N）、中線對地（N-PE）及其組合。這些連接方式稱作保護模式。

　　Protective element of SPD can be connected between phase line to phase line （L-L）， phase line to earth （L-PE）， phase line to neutral line （L-N）， neutral line to earthing line （N-PE） or their combination. These connections call protection modes.

　　SPD脫離器的 SPD disconnector

　　把SPD從電源系統(tǒng)斷開所需要的裝置（內(nèi)部的和/或外部的）

　　The device that isolates SPD from power supply network （interior and / or outer）

　　標稱放電電流ln nominal discharge current

　　流過SPD具有8/20波形的電流峰值，用于II級試驗的SPD分級以及I級、II級試驗的SPD的預(yù)處理實驗。

　　The 8/20 wave current peak that passing by SPD, used for grading SPD under class II test, or prospective treatment of SPD class I 、II test

　　沖擊電流limp impulse current

　　它由電流峰值l Peak 和電荷量Q確定。其試驗應(yīng)根據(jù)動作負載試驗的程序進行。這是用于I級試驗的SPD分類試驗。

　　It determined by current peak value and charge Q, it shall be performed according to the program for test of acting load. It is used for SPD classification Class I test

　　最大放電電流lmax

　　maximum discharge current forclass II test

　　流過SPD，具有8/20波形電流的峰值，其值按II級動作負載的程序確定。lmax大于ln

　　Passing through SPD, the peak value of current with 8/20 wave, determined by the program for Class II acting load. lmax larger than ln

　　最大持續(xù)工作電壓Uc

　　maximum continuous operating voltage

　　允許持久地施加在SPD上的最大交流電壓有效值或直流電壓。其值等于額定電壓。

　　Maximum AC virtual voltage or DC voltage allowed to be applied on SPD continuously, the value equal to rated voltage.

　　電壓保護水平Up voltage protection level

　　表征SPD限制接線端子間電壓的性能參數(shù)，其值可從優(yōu)先值的列表中選擇。該值應(yīng)大于限制電壓的最高值。

　　It indicates the performance of SPD limiting the voltage between terminals being connected. The value can be selected from the sheet of prior values. This value shall be larger than highest limited voltage.