在磁制动母线差动保护的基本原理基础上提出了一种实时检测电流互感器（CT）二次电阻R的方法。
It proposes a method of detecting the secondary resistance R of CT on real time based on the principle of magnetic restraint differential protection for busbar.
用于电焊机二次侧接线及连接电焊钳、电焊机的专用电缆，其特性是电阻大、电压低。
For the electric welding machine two secondary side wiring and electrode holder, welding connection cable, its characteristic is high, low voltage resistance.
应用二次脉冲电流，改变电阻焊熔核的金属组织结构，达到提高焊接强度的目的。
The twice impulse process is employed to change the metallic structure of the resistance welding so as to improve the welding strength.
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