用环氧和有机硅树脂涂料对由聚乙烯／炭黑（PE／CB）制备的正温度系数（PTC）电路保护元件的表面处理及其工艺进行了研究。
The packaging materials and processes of positive temperature coefficient (PTC) devices made up of the composite of polyethylene and carbon black(PE/CB) for over current protection were studied.
继电器是保护系统的逻辑元件，它感知故障，并使断路器解扣电路带电和断路器打开触点。
Relays are the logic elements of a protection system which sense the fault and cause the circuit-breaker trip circuits to be energized and the breakers to open their contacts.
另一个关注焦点为专门设计用于保护电路的元件，使其不受电流和电压冲击、ESD和非正常范围温度影响。
A further focus is on components that are designed to protect circuits from current and voltage surges, ESD and excessive temperatures.
保护元件和电路，防止在电源供应、控制和信号线产生的ESD。
Protection of Components and Circuits Sensitive to ESD Transients Occurring on Power supplies, Control and Signal Lines.
我们的电子元件处理电信号，保护电子电路和控制电源供应。
Our components process electrical signals, protect electronic circuitry and control energy supplies.
本文介绍了一种只用一块NE555时基电路和少量分立元件，就能制作一个具有过压、欠压和断电延迟三种保护功能的全自动电冰箱保护器。
The author introduces the process of using NE555circuit and a few fittings to make a tutamen of automatic refrigerator with functions of over-pressure, deficient pressure, and delay.
本文介绍了一种只用一块NE555时基电路和少量分立元件，就能制作一个具有过压、欠压和断电延迟三种保护功能的全自动电冰箱保护器。
The author introduces the process of using NE555circuit and a few fittings to make a tutamen of automatic refrigerator with functions of over-pressure, deficient pressure, and delay.
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