03_Ex i circuits_bi德和盛油气站防雷讲座.ppt

1、Konferenz Jurata 2009,Surge protection for intrinsically safe circuits 本质安全电路电涌保护,www.dehn.de,Konferenz Jurata 2009,A circuit is intrinsically safe if no spark and thermal effect, which occur under defined experimental conditions (including normal operation and certain fault conditions), can ignite

2、a certain explosive atmosphere. 如果一个电路在某实验条件下(包括正常工作和故障情形), 不会产生能导致爆炸气体点火的闪络和温度变化, 这样的电路是本质安全的.,Measuring and control technology, communication technology 测控技术, 通信技术,Basic principle:/ 基本原则,Application: / 应用,Intrinsic safetyEx i in accordance with EN 60 079-11, 2007-01本质安全电路 EX i, 根据EN 60079-11, 2007

3、-01,Konferenz Jurata 2009,“Lightning is not intrinsically safe !“雷击不是本质安全,Konferenz Jurata 2009,1. Lightning as an ignition source / 雷击为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazardous areas 根据62305 危险区域防雷系统,3. Design of intrinsically safe circuits 本质安全电路设计,Konferenz Ju

4、rata 2009,1. Lightning as an ignition source / 雷击为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazardous areas 根据62305 危险区域防雷系统,3. Design of intrinsically safe circuits 本质安全电路设计,Konferenz Jurata 2009,EN 1127-1:2007 “Explosive atmospheres - Explosion prevention and protection

5、- Part 1: Basic concepts and methodology“ EN 1127-1:2007 “爆炸环境-防爆及保护-第1部分: 基本概念及方法,The following possible ignition sources are specified in the standard: 标准中列举了以下可能的点火源: - Flames and hot gases / 明火及高温气体 - Hot surfaces / 高温表面 - Mechanically generated sparks / 机械引起的火星 - Elecrical apparatus / 电器设备 - St

6、ray electric currents /杂散电流 - Static electricity / 静电 - Lightning / 雷击 - Electromagnetic waves / 电磁波 - Ionising radiation / 离子辐射 - Ultrasonics / 超音波,Konferenz Jurata 2009,Control room / 控制室,Looking for Sources of Ignitions确定点火源,Non-hazardous area,Hazardous area / 危险区域,1 IN 2,I.S. Barrier /安全栅,explos

7、ion protection zone 0 防爆分区0,explosion protection zone 1, 2 防爆分区1,2,Konferenz Jurata 2009,Control room/ 控制室,Looking for Sources of Ignitions确定点火源,Non-hazardous area,Hazardous area / 危险区域,1 IN 2,I.S. Barrier /安全栅,explosion protection zone 0 防爆分区0,explosion protection zone 1, 2 防爆分区1,2,Konferenz Jurata

8、 2009,Control room / 控制室,Looking for Sources of Ignitions确定点火源,Non-hazardous area,Hazardous area / 危险区域,1 IN 2,I.S. Barrier / 安全栅,explosion protection zone 0 防爆分区0,explosion protection zone 1, 2 防爆分区1,2,Konferenz Jurata 2009,Control room / 控制室,Looking for Sources of Ignitions确定点火源,Non-hazardous area

9、,Hazardous area / 危险区域,1 IN 2,I.S. Barrier / 安全栅,explosion protection zone 0 防爆分区0,explosion protection zone 1, 2 防爆分区1,2,Konferenz Jurata 2009,Explosion prevention and protection, Basic concepts and methodology DIN EN 1127 - 1, 2007EN 1127-1:2007 “爆炸环境-防爆及保护-第1部分: 基本概念及方法,5 Elements of risk assessm

10、ent 风险评估要素 5.3.8 Lightning 雷击 If lightning strikes in an explosive atmosphere, ignition will always occur. Moreover, there is also a possibility of ignition due to the high temperature reached by lightning conductors. 如果雷电击中爆燃性气体, 点火总是不可避免会发生. 而且, 雷击导体上产生的高温，其导致点火的可能性始终存在. Large currents flow from w

11、here the lightning strikes and these currents can produce sparks in the vicinity of the point of impact. 当大电流流过时, 同样会在相邻接点之间产生跳火.,Konferenz Jurata 2009,Explosion prevention and protection, Basic concepts and methodology DIN EN 1127 - 1, 2007EN 1127-1:2007 “爆炸环境-防爆及保护-第1部分: 基本概念及方法,5 Elements of risk

12、 assessment 风险评估要素 5.3.8 Lightning 雷击 Even in the absence of lightning strikes, thunderstorms can cause high induced voltages in equipment, protective systems and components. 即使没有雷击, 雷暴也会在设备,保护系统和器件上产生很高的感应电压 For protective measures against ignition hazards due to lightning, see 6.4.8. 雷击点火危害的防护措施详见

13、6.4.8,Konferenz Jurata 2009,Lightning as an ignition source in accordance with EN 1127-1 (6.4.8)根据EN 1127-1 (6.4.8) 雷击作为点火源,If hazards due to lightning have been identified, the following specific requirements for equipment, protective systems and components shall be complied with: All categories: I

14、nstallations shall be protected by the appropriate lightning protection measures. 如果雷击导致的危害能确定, 紧随的对设备,保护系统和器件的详细需求要符合: 所有类别: 装置需受适当的防雷措施保护. The effects of lightning occurring outside zones 0 and 20 from damaging zones 0 and 20 shall be prevented, e.g. overvoltage protection systems could be install

15、ed at appropriate places. 雷击发生在0区和20区且带来的损害必须被避免, 如过电压保护系统可安装在适当的位置.,Konferenz Jurata 2009,Lightning as an ignition source in accordance with EN 1127-1 (6.4.8)根据EN 1127-1 (6.4.8) 雷击作为点火源,These requirements shall be included in the information for use (see section 7). Protective measures against ligh

16、tning shall not impair cathodic corrosion protection / Ex i measures. 这些需求应被包括在应用信息中(见第7节) 防雷措施不应该削弱阴极防腐保护措施.,Konferenz Jurata 2009,1. Lightning as an ignition source / 雷击为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazardous areas 根据62305 危险区域防雷系统,3. Design of intrinsically

17、 safe circuits 本质安全电路设计,Konferenz Jurata 2009,control room 控制室,Lightning and surge protection in accordance withEN 62305雷击及电涌保护,根据EN 62305,Non-hazardous area,Hazardous area measuring and control circuit Ex(i) 危险区域测控电路,3 OUT 4,1 IN 2,BLITZDUCTOR CT,explosion protection zone 0 防爆分区0,explosion protecti

18、on zone 1, 2 防爆分区1,2,min. 4 mm,BLITZDUCTOR BXT BAS EX, BXT ML4 .EX,LPZ 2,LPZ 1,LPZ 1,LPZ 0 A,DEHNpipe DPI MD EX 24 M2,R,Ex,LPZ 0 B,Konferenz Jurata 2009,control room 控制室,Lightning and surge protection in accordance with EN 62305雷击及电涌保护,根据EN 62305,Non-hazardous area,3 OUT 4,1 IN 2,BLITZDUCTOR CT,expl

19、osion protection zone 0 防爆分区0,explosion protection zone 1, 2 防爆分区1,2,min. 4 mm,BLITZDUCTOR BXT BAS EX, BXT ML4 .EX,LPZ 2,LPZ 1,LPZ 1,LPZ 0 A,DEHNpipe DPI MD EX 24 M2,R,Ex,LPZ 0 B,Hazardous area measuring and control circuit Ex(i) 危险区域测控电路,Konferenz Jurata 2009,1. Lightning as an ignition source / 雷击

20、为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazardous areas 根据62305 危险区域防雷系统,3. Design of intrinsically safe circuits 本质安全电路设计,Konferenz Jurata 2009,Intrinsic safetyEx i in accordance with EN 60 079-11, 2007-01根据EN 60079-11,2007-01 本质安全 EX i,Safety barriers are passive netw

21、orks which isolate intrinsically safe circuits from non-intrinsically safe circuits without galvanic isolation. The installation of safety barriers allows to use standard instrumentation and installation in the non-intrinsically safe circuit. However, voltages must not exceed 250 V. A major drawback

22、 of this safety barrier is its relatively high ohmic resistance which has to be considered for line compensation. Safety barriers are always installed outside hazardous areas. 安全栅为无源网络,用来隔离本质安全电路和非本质安全电路,通过非电气隔离的方式. 允许使用标准仪表并安装在非本质安全电路中. 但是, 其电压不能超过250V, 且本身的高阻性的弱点在线路补偿中必须被考虑. 通常安全栅都安装在危险区域外围.,Block

23、 diagram of a safety barrier / 安全栅电路图,Konferenz Jurata 2009,Only safety barriers with galvanic isolation can be used for hazardous zone 0. Earth connection of intrinsically equipment under normal operating conditions is permitted. Different earth potentials will not cause measurement errors. The int

24、rinsically circuit and the measuring instrument can have different potentials. Installation time is reduced since equipotential bonding is not required. 只有带电隔离的安全栅才能被应用在危险分区0. 允许正常工作条件下本质设备的接地连接. 不同的地电势不会导致测量误差. 本质电路和测量设备可具有不同的电势. 由于不再需要等电位连接,安装时间大大减少.,Block diagram of a safety barrier with galvanic

25、 isolation / 带电隔离的安全栅电路图,Intrinsic safetyEx i in accordance with EN 60 079-11, 2007-01根据EN 60079-11,2007-01 本质安全 EX i,Konferenz Jurata 2009,Intrinsic safetyEx i in accordance with EN 60 079-11, 2007-01根据EN 60079-11,2007-01 本质安全 EX i,Isolation from intrinsically safe electric equipment / 本质安全电气设备的隔离

26、Isolation has to be ensured: / 隔离必须被确保: between the intrinsically safe circuit and the chassis; 本质安全电路与底座之间 a.c. test voltage of at least 500 V rms, 1 min. 交流测试电压至少为500V, 持续1分钟 between the intrinsically safe and non-intrinsically safe circuit; 本质安全和非本质安全电路之间 a.c. test voltage of at least 1500 V rms,

27、 1 min. 交流测试电压至少为1500V, 持续1分钟,Hazardous area / 危险区域,Non-hazardous area / 非危险区域,Resistance thermometer (enlarged) 阻性温度计,Transducer (associated equipment) 变送器(关联设备),Konferenz Jurata 2009,1. Lightning as an ignition source / 雷击为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazard

28、ous areas 根据62305 危险区域防雷系统,3. Design of intrinsically safe circuits 本质安全电路设计,Konferenz Jurata 2009,Minimum discharge capacity of 10 impulses with 10 kA (8/20 s) each without reducing or negatively affecting the protective function. 最少10个冲击,每次放电电流10kA (8/20 s), 冲击后保护功能不会降低或者 劣化.,Installation of the S

29、PD into a metal housing and earthing of min. 4 mm Cu SPD应安装在金属箱体内且接地线至少为4 mm铜线.,Selection of surge protective devices Requirements in accordance with EN 60079-14根据EN 60079-14 电涌保护器需求及选型,Installation of the conductor between SPD and equipment in the metal pipe which is earthed at both ends or use of

30、shielded conductors with a length of max. 1m SPD和金属管道内的设备导线两端应接地或采用最长不超过1米的屏蔽线.,Konferenz Jurata 2009,Isolation from earth of the intrinsically safe equipment? 本质安全设备是否对地隔离?,Type of protection - Category ia or ib? 防护类别- ia 或 ib?,Compliance with the maximum permissible values for Lo and Co 是否满足最大允许的电

31、感电容值?,Compliance with the maximum values for U0 and I0 是否满足电压和电流的最大值?,Energy coordination of surge protective device and terminal equipment 电涌保护器与终端设备是否能量协调?,Selection of surge protective devices Requirements in accordance with EN 60079-14根据EN 60079-14 电涌保护器需求及选型,Konferenz Jurata 2009,automation dev

32、ice 自动化设备,safety barrier/ 安全栅,Non-hazardous area /非危险区域,Transducer 变送器,Safety barrier with galvanic isolation Isolation from earth 与地电隔离的安全栅,Hazardous area/ 危险区域,Konferenz Jurata 2009,BLITZDUCTOR XT BXT ML4 BD EX 30Isolation from earth ensured !BXT ML4 BD EX 30, 确保对地隔离,Power-frequency voltage streng

33、th = 500 V 工频电压强度 = 500V,Konferenz Jurata 2009,(1),(2),(PA),Safety barrier with galvanic isolation Protection with Blitzductor XT BXT ML4 BD EX 30 电隔离保护的安全栅,PA,(1),(2),Konferenz Jurata 2009,BD EX,Tr,Se,1,2,1,2,BD EX,1,2,1,2,signal line / 信号线,BLITZDUCTOR XT,BLITZDUCTOR XT,sensor 1) 传感器,intermeshed ea

34、rth-termination system/ 网格接地系统,1)Insulation strength 500 V a.c. Ensure consistent equipotenital bonding and intermeshing 绝缘强度 500 V, 在保证良好的等电位连接和网格接地情况下.,Summary: Installation of surge protective devices Ex (i)总结: 本安型电涌保护器安装,safetybarrier 1) 安全栅,Konferenz Jurata 2009,Example of use: BXT ML4 BD EX 30

35、, installation into a switchgear cabinet应用举例: BXT ML4 BD 3X 30, 安装在开关柜内,Source: TAL Pipeline,FISCO certification,Certificate of conformity KEMA 06 ATEX 0274 X II 2 (1) G EEx ia IIC T4/T5/T6,Konferenz Jurata 2009,Example of use: BXT ML4 BD EX 30, Installation into a metal housing应用举例: BXT ML4 BD EX 3

36、0, 安装在金属箱体内,FISCO certification,Certificate of conformity KEMA 06 ATEX 0274 X II 2 (1) G EEx ia IIC T4/T5/T6,Konferenz Jurata 2009,FISCO certification,for intrinsically safe circuits 本质安全电路应用,Certificate of conformity PTB 03 ATEX 2088 II 2 (1) G EEx ia IIC T4/T5/T6,Example of use: DPI MD EX 24 M 2,

37、Installation into a metal pipe应用举例: DPI MD EX 24 M 2, 安装在金属管道内,Konferenz Jurata 2009,1. Lightning as an ignition source / 雷击为点火源一种,2. Lightning protection systems in accordance with EN 62305 in hazardous areas 根据62305 危险区域防雷系统,3. Design of intrinsically safe circuits 本质安全电路设计,Konferenz Jurata 2009,H

38、azardous area Non-hazardous area,Transducer /变送器,casting compound,UZ,RS,IO,UO,UN,automation device 自动化设备,PA,Safety barrier without galvanic isolation Earth-bound 非电隔离并接地的安全栅,safety barrier / 安全栅,危险区域 非危险区域,Konferenz Jurata 2009,Isolation from earth of the intrinsically safe equipment? 本质安全设备是否对地隔离?,Type of protection - Category ia or ib? 防护类别 ia 或 ib?,Compliance with the maximum permissible values for Lo and Co 是否满足最大允许的电感电容值?,Compliance with the maximum values for U0 and I0 是否满足电压和电流的最大值?,Energy coordination of surge prote