[经验]

断路器基础知识

2018-11-1 15:42:42

2800 断路器电机

我最近写了一篇关于断路器的文章以及选择特定型号断路器的一些注意事项。
无论设备的设计有多好，它仍然会受到工程师无法控制的事件的影响。
从雷击到短路，电路保护可以节省很多钱。
有许多不同类型的过电流情况可能发生，有些是必要的，如电机上的浪涌电流。
不同类型的断路器对于不同的应用更好。
本文探讨了三种不同类型的断路器，一些在工业中使用的术语，以及在Digi-Key网站上可以找到这些术语的地方。
涵盖的各种断路器包括：
磁性
对温度不敏感
电压敏感 - 不能与AC模型交叉DC模型
当存在过多电流时，使用磁场驱动螺线管以使断路器跳闸
热
温度敏感
对电压不敏感 - 可以使用AC模型穿过DC模型
使用双金属片来感应电流引起的温度变化
固体状态
更换双金属片和电磁阀操作
使用电流传感器和微处理器或微控制器监控
响应时间快得多
更贵

以上来自于谷歌翻译

以下为原文

I recently wrote an article about circuit breakers and some considerations for choosing a particular model of breaker. No matter how good of a design a device has, it will still be subjected to events that are out of the control of the engineer. From lightning strikes to short circuits, circuit protection can save a lot of money. There are many different kinds of over current situations that can happen, and some are necessary like an inrush current on a motor. Different types of circuit breakers are better for different applications. The article explores three different types of circuit breakers, some of the terminology that is used in industry, and where to find these on the Digi-Key website.

The different kinds of circuit breakers that are covered are:
Magnetic

Not temperature sensitive
Voltage sensitive – can’t cross DC model with AC model
Uses magnetic field to actuate a solenoid to trip breaker when too much current is present

Thermal

Temperature sensitive
Not voltage sensitive – can cross a DC model with an AC model
Uses bimetallic strip to sense temperature change caused by current

Solid State

Replace bimetallic strip and solenoid operation
- Use current sensor and microprocessor or microcontroller to monitor
Much faster response time
More expensive