IS220PCAAH1A工控自动化卡件
M断路器Publicati Bulletin M断路器可用于保护分支电路。分支电路是一个系统的接线部分，它延伸到构成电路的最后一个过电流装置之外。应使用iEC、CEC、UL和CSA制定的指南来确定特定设备。例如，电机分支电路公告M断路器没有额定功率，因为它们能够安全地中断超过所选电机锁定转子值的电流。该能力在标准和标准中得到认可，并通过UL和CSA C标准中所述的UL和CSA测试进行测试。Bulletin M断路器的尺寸应按照反时限断路器的指南确定。参考NEC。因此，请参见CEC和适当的加拿大标准。变压器保护公告M断路器可用于变压器保护，遵循制定的指南。参考NEC和UL，请参见CEC和相应的加拿大标准。分支电路应用信息电路电压公告M断路器按电压等级进行额定。应用程序不应超过列出的电压和电流范围。电路频率Bulletin M断路器可用于降额和不降额的频率。对于应用，请提供断路器降额的具体应用信息。有效短路电流Bulletin M断路器仅适用于有效短路或故障电流小于或等于美国/加拿大和的应用。应用程序跳闸特性曲线特性如下页所示。断路器所示的频带代表断路器的电流跳闸限值，并且在UL规定的限值范围内。公告M的标准跳闸电流为C型。C型断路器的励磁电流为断路器的额定电流。热跳闸特性的参考温度为C。C型特性适用于大多数应用。在C型电流不完全满足应用要求的情况下，D型磁电流可用，其转变高度约为标准C型电流的两倍。对于C级的特定电流，断路器将在曲线所示的最短和最长时间内的某个总时间内自动“闭合电路”。例如，一个e，Bulletin M断路器跳闸时间小于s，但不超过s a电流。因为UL标准定义了这个时间读数，所以用户不应该指定下一个跳闸时间。曲线左上角的下电流部分表示由于电线和cne负载的热ti和回流过载保护而导致的时间。右下角曲线中较高的电流部分表示由于断路器的磁性ti和短路水平电流引起的回流保护。以下是与北美应用相关的应用案例的讨论。当将产品应用于区域要求时，请遵循规程和指南。特定应用的特定安培额定值的选择取决于负载类型和占空比，并由
M Circuit Breakers Publicati Bulletin M circuit breakers may be used to prote branch circuits. A branch circuit is the wiring porti of a system extding beyd the final overcurrt device proteing the circuit. Guidelines estlished iEC, CEC, UL, and CSA should be used to detere the ecific device. For exampleMotor Branch Circuit Bulletin M circuit breakers e not horsepower rated because they e le to safely interrupt currts f in excess of the locked rotor value for a seleed motor. This ility is recognized in the s and standds and isso estlished by the UL and CSA tests described in UL and CSA C. standds. The size of a Bulletin M circuit breaker should be dete following the guidelines for an Inverse Time Circuit Breaker. RefercesNEC . and UL .so see CEC and appropriate Canadian Standds. Transformer Protei Bulletin M circuit breakers may be used for transformer protei following the guidelines estlished. RefercesNEC and UL .so see CEC and appropriate Canadian Standds. Branch Circuits Applicati Informati Circuit Voltage The Bulletin M circuit breakers e rated by voltage class. Applicatis should not exceed the listed voltage and currt range. Circuit Frequcy The Bulletin M circuit breakers may be applied to frequcies of and without derating. For applicatis ove , t with ecific applicati informati for the derating of the circuit breakers. Availle Short Circuit Currt The Bulletin M circuit breakers should ly be applied in those applicatis in which the availle shortcircuit or fault currt is less than or equal to US/Canada and . Applicati Csideratis Tripping Chteristics The curve chteristics e shown the following pages. The bands shown for eh breaker represt currt tripping limits for a circuit breaker and e within the limits estlished by UL. The standd tripping chteristic for Bulletin M is Type C. Type C has a magnetic tivated at times the rated currt of the circuit breaker. The referce temperature for the thermal tripping chteristics is C. The Type C chteristic will suit most applicatis. In re occurrces wh the Type C chteristic does not fully meet the applicati, Type D magnetic chteristic is availle,lowing for transits approximately twice as high as the standd Type C. For a ecific currt at C, a circuit breaker will op "cle the circuit" automatically at some total time that will be within the imum and maximum time shown the curves. For example, a e, Bulletin M circuit breaker trips iot less than s and not more than s a A currt. Because the UL standd defines this time read, users should not ecify ext tripping time. The lower currt porti of the curves upper left depis the time to due to thermal ti and refle overload protei of the wire and cne load. The higher currt porti of the curves lower right depis the due to magnetic ti of the circuit breaker and refles protei due to short circuit level currts. The following is a discussi of applicati csideratis related to North American applicatis. Wh applying produ to regial requiremts, follow prtices and guidelines. The selei of a ecific ampere rating for a ecific applicati is depdt the type of load and duty cycle and is governed by the
