IS220PCAAH1A工控自動化卡件
M斷路器Publicati Bulletin M斷路器可用于保護分支電路。分支電路是一個系統的接線部分，它延伸到構成電路的最后一個過電流裝置之外。應使用iEC、CEC、UL和CSA制定的指南來確定特定設備。例如，電機分支電路公告M斷路器沒有額定功率，因為它們能夠安全地中斷超過所選電機鎖定轉子值的電流。該能力在標準和標準中得到認可，并通過UL和CSA C標準中所述的UL和CSA測試進行測試。Bulletin M斷路器的尺寸應按照反時限斷路器的指南確定。參考NEC。因此，請參見CEC和適當的加拿大標準。變壓器保護公告M斷路器可用于變壓器保護，遵循制定的指南。參考NEC和UL，請參見CEC和相應的加拿大標準。分支電路應用信息電路電壓公告M斷路器按電壓等級進行額定。應用程序不應超過列出的電壓和電流范圍。電路頻率Bulletin M斷路器可用于降額和不降額的頻率。對于應用，請提供斷路器降額的具體應用信息。有效短路電流Bulletin M斷路器僅適用于有效短路或故障電流小于或等于美國/加拿大和的應用。應用程序跳閘特性曲線特性如下頁所示。斷路器所示的頻帶代表斷路器的電流跳閘限值，并且在UL規定的限值范圍內。公告M的標準跳閘電流為C型。C型斷路器的勵磁電流為斷路器的額定電流。熱跳閘特性的參考溫度為C。C型特性適用于大多數應用。在C型電流不完全滿足應用要求的情況下，D型磁電流可用，其轉變高度約為標準C型電流的兩倍。對于C級的特定電流，斷路器將在曲線所示的最短和最長時間內的某個總時間內自動“閉合電路”。例如，一個e，Bulletin M斷路器跳閘時間小于s，但不超過s a電流。因為UL標準定義了這個時間讀數，所以用戶不應該指定下一個跳閘時間。曲線左上角的下電流部分表示由于電線和cne負載的熱ti和回流過載保護而導致的時間。右下角曲線中較高的電流部分表示由于斷路器的磁性ti和短路水平電流引起的回流保護。以下是與北美應用相關的應用案例的討論。當將產品應用于區域要求時，請遵循規程和指南。特定應用的特定安培額定值的選擇取決于負載類型和占空比，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
