< ,="" tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">B&nbs;型剩余电流断路器测试仪概述： < ,="" tahoma,="" arial,=""宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear:both;">B型剩余电流断路器测试仪（以下简称测试仪）是为剩余电流断路器的性能测试而研制，它是检测B型剩余电流断路器脱扣电流和分断时间的关键仪器。< ,="" tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">测试仪的功能能够满足GB16916.1-2003、GB16917.1-2003和GB22974-2008标准对剩余电流断路器的测试要求。< ,="" tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">测试仪适用于电子式和电磁式的剩余电流断路器。1P+N、2P、、+N、4P的断路器均能测试，输出大剩余电流为2A。< ,="" tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">测试仪的功能操作采用触摸屏，断路器动作后，脱扣电流和分断时间均能保持，便于读数和记录。 < ,=""tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">系统显示和操作采用流行的工业级触摸屏，操作简单； < ,="" tahoma,="" arial,=""宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">辅助电源要求：三相四线输入380V，大于2A < ,=""tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">接地方式：可靠接地 < ,="" tahoma,="" arial,="" 宋体,=""sans-serif;="" font-style:="" normal;="" font-variant-ligatures:=""font-variant-cas:="" font-weight:="" 400;="" letter-sacing:=""orhans:="" 2;="" text-align:="" left;="" text-indent:="" 0x;=""text-transform:="" none;="" white-sace:="" widows:=""word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">2.2仪器输出电流范围和精度 < ,="" tahoma,=""arial,="" 宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear:both;">&nbs;&nbs;测试仪输出的电流值为真有效值，测试不确定度小于1%； < ,=""tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">&nbs;1）变频模式交流剩余电流范围：0~2A； < ,="" tahoma,=""arial,="" 宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">（2）50Hz交流剩余电流范围：0~2A； < ,="" tahoma,=""arial,="" 宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">（3）脉动直流剩余电流 < ,="" tahoma,="" arial,=""宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">选项角为0°的脉动直流剩余电流，电流的范围为0~800mA； < ,=""tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">选项角为90°的直流剩余电流，电流的范围为0~400mA； < ,="" tahoma,=""arial,="" 宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">选项角为135°的直流剩余电流，电流的范围为0~200mA； < ,=""tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">（4）平滑直流剩余电流，剩余电流的范围为0~2A； < ,="" tahoma,="" arial,=""宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear: both;">（5）叠加平滑直流的范围为5~100mA； < ,="" tahoma,=""arial,="" 宋体,="" sans-serif;="" font-style:="" normal;=""font-variant-ligatures:="" font-variant-cas:="" font-weight:=""400;="" letter-sacing:="" orhans:="" 2;="" text-align:="" left;=""text-indent:="" 0x;="" text-transform:="" none;="" white-sace:=""widows:="" word-sacing:="" -webkit-text-stroke-width:=""text-decoration-style:="" initial;="" text-decoration-color:=""initial;"="" data-x-flag="12_6" style="margin-to: 0x;margin-bottom: 0x; adding: 0x; outline: 0x; color: rgb(51, 51, 51);font-size: 14x; white-sace: normal; background-color: rgb(255, 255,255); osition: relative; line-height: 2em; font-family: "MicrosoftYaHei"; clear:both;">&nbs;（6）时间测试：在0~1000ms范围内，漏电测试仪测量的分断时间相对于计量值的偏差在±2ms。< ,="" tahoma,="" arial,="" 宋体,="" sans-serif;="" font-style:=""normal;="" font-variant-ligatures:="" font-variant-cas:=""font-weight:="" 400;="" letter-sacing:="" orhans:="" 2;=""text-align:="" left;="" text-indent:="" 0x;="" text-transform:=""none;="" white-sace:="" widows:="" word-sacing:=""-webkit-text-stroke-width:="" text-decoration-style:="" initial;=""text-decoration-color:="" initial;"="" data-x-flag="12_6"style="margin-to: 0x; margin-bottom: 0x; adding: 0x; outline: 0x;color: rgb(51, 51, 51); font-size: 14x; white-sace: normal;background-color: rgb(255, 255, 255); osition: relative;line-height: 2em; font-family: "Microsoft YaHei"; clear:both;">&nbs;
CAN收发器的改良和隔离器件引入，大大提高了通信的可靠性，但同时也引入了额外的延时，导致通信距离变短，或总线错误帧增加，本文以1Mbs波特率下的应用为例，对CAN总线信号延时做简要分析。CAN总线传输距离的相关因素ACK应答CAN总线采用多主通信模式、非破坏式总线仲裁机制。以标准数椐帧为例，从结构上看分成7段，分别为起始段、仲裁段、控制段、数椐段、CRC校验段、ACK应答段、帧结束段，如所示：标准数椐帧结构及应答ACK段长度为2个位，包含应答间隙（ACKSLOT）和应答界定符（ACKDELIMITER）。CAN总线作为应用非常广泛的现场总线，保证CAN总线一致性非常重要，DLC作为CAN帧的一部分，它的正确与否直接影响到总线通信。那么DLC代表什么?它的功能是什么?如何测试验证其正确性?CAN总线是ISO标准化的串行通信协议。在汽车产业中，出于对安全性、舒适性、方便性、低公害、低成本的要求，各种各样的电子控制系统被开发了出来。由于这些系统之间通信所用的数据类型及对可靠性的要求不尽相同，由多条总线构成的情况很多，线束的数量也随之增加。伴随越来越多的高科技汽车电子产品的开发与应用，如何解决汽车电子系统的电磁兼容问题，提高汽车的可靠性和安全性，已经成为一个非常重要和迫切的问题。然而接地设计作为根治电磁兼容问题方法之一，地偏移测试显得就尤为重要了，因此本文对接地设计及地偏移测试进行了解读。整车系统接地设计地线的意义地线在汽车上不仅仅是一个接点，它是一个综合的系统的汽车电气系统，它的主要功能有：提供给直流负载、交流负载和瞬变负载电流回路，连接蓄电池或发电机的负极端；提供电压给传感器、通讯系统、单端数字输入等；静电，隔离外部RF辐射；提供静电放电泄流，ESD保护；汽车天线的地平面；降低电平，减小腐蚀。