(一) 概述新型组合接触器是东风_4型内燃机车电控攻关电器之一。于1982年开始设计,在原组合接触器的基础上,吸收机务段运用意见,本着使用可靠、便于维修、通用互换、降低成本的原则,尤其是在触头材质上做了较大的改进。取消了银炭化钨触头,以铜质代替,并于1983年3月完成样机试制。样机见图1。 (A) Overview The new combination contactor is Dongfeng _4 diesel locomotive one of the electric control off. In 1982, the design was started. Based on the original combination contactor, it absorbed the opinions of the locomotive depot. In line with the principle of reliable use, easy maintenance, universal interchangeability and cost reduction, the contact material made great improvements . Canceled the silver-carbonized tungsten contact, replaced by copper, and completed prototype test in March 1983. The prototype see Figure 1.