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ND_5机车的电子装置主要有三个部分:恒功励磁屏、防空转屏和电压调节器。前两个屏构成的系统比国产电传动内燃机车相应的系统性能好、可靠性高,但复杂程度也较高。本文介绍CHEC系统和恒功励磁屏性能、输入/输出信号,故障分析等,主要供运用部门的检查维修人员参考。一、CHEC系统及励磁屏介绍 ND_5机车的CHEC系统的核心部分是恒功励磁屏,也简称为CHEC屏,CHEC的含义是“恒定功率励磁控制”(Constant Horse power Excitation Control)。第一批机车采用17FL246El,机车号为001～220;第二批机车采用17FL257A6,机车号为221～420。
ND_5 locomotive electronic device has three main parts: constant excitation screen, air defense screen and voltage regulator. The system composed of the first two screens has better system performance and higher reliability than the domestic electric drive diesel locomotives, but the complexity is also high. This article describes the CHEC system and constant excitation screen performance, input / output signals, fault analysis, etc., mainly for the inspection department maintenance staff reference. I. Introduction of CHEC system and excitation screen The core of CHEC system of ND_5 locomotive is the constant excitation excitation screen, also referred to as CHEC screen for short, meaning “Constant Horse power Excitation Control”. The first locomotive using 17FL246El, locomotive number 001 ~ 220; the second locomotive using 17FL257A6, locomotive number 221 ~ 420.