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电涌保护器名词术语解释
EXPLANATION OF SPD TECHNICAL TERM
电涌保护器 (SPD) surge protective device
用于限制瞬时过电压和泄放电涌电流的电器，它至少包含一个非线性的元件。
The appliance used to limit transient over voltage and discharge the surging current, it includes one of non-linear element at least.
电压开关型SPD voltage switching type SPD
没有电涌时具有高阻抗，有浪涌电压时能立即转变成低阻抗的SPD。电压开关型SPD常用的元件有放电间隙、气体放电管、闸流管（硅可控整流器）和三端双向可控硅开关元件。这类SPD有时也称作“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”
电压限制型SPD voltage limiting type SPD
没有电涌时具有高阻抗，但是随着电涌电流和电压的上升，其阻抗将持续地减小的SPD。常用的非线性元件是：压敏电阻和抑制二极管。这类SPD有时也称作“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”
复合型SPD combination SPD
由电压开关型元件和电压限制型元件组成的SPD。其特性随所加电压的特性可以表现为电压开关型、电压限制型或两者皆有。
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.
保护模式modes of protection
SPD 保护元件可以连接在相对相（L-L）、相对地（L-PE）、相对中线（L-N）、中线对地（N-PE）及其组合。这些连接方式称作保护模式。
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脱离器的 SPD disconnector
把SPD从电源系统断开所需要的装置（内部的和/或外部的）
The device that isolates SPD from power supply network (interior and / or outer)
标称放电电流ln nominal discharge current
流过SPD具有8/20波形的电流峰值，用于II级试验的SPD分级以及I级、II级试验的SPD的预处理实验。
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
冲击电流limp impulse current
它由电流峰值l Peak 和电荷量Q确定。其试验应根据动作负载试验的程序进行。这是用于I级试验的SPD分类试验。
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
最大放电电流lmax
maximum discharge current forclass II test
流过SPD，具有8/20波形电流的峰值，其值按II级动作负载的程序确定。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
最大持续工作电压Uc
maximum continuous operating voltage
允许持久地施加在SPD上的最大交流电压有效值或直流电压。其值等于额定电压。
Maximum AC virtual voltage or DC voltage allowed to be applied on SPD continuously, the value equal to rated voltage.
电压保护水平Up voltage protection level
表征SPD限制接线端子间电压的性能参数，其值可从优先值的列表中选择。该值应大于限制电压的最高值。
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.
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