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1.在选购时首先应考虑开关本身的降容问题,即:实际使用电路额定电流应为开关本体额定电流容量乘上一个阵容系数(一般降容系数选择0.8)。举个例子:实际照明配电箱某电路电流为25A,那么实际应选用额定电流为32A的断路器才能满足使用要求(32A×0.8=25A)。 2.此类产品已被国家质量技术监督局列为强制性生产品安全认证,因此在选购时应选取得电工产品安全认证,即长城标志的产品。不同制造厂所生产的断路器由于生产管理、制造工艺等差别,产品质量尚有差异,所以在选购时
1. In the purchase should first consider the derating of the switch itself, that is: the actual use of circuit rated current should be the rated current capacity of the switch body multiplied by a line-up coefficient (general derating factor selection of 0.8). For example: the actual lighting distribution box circuit current of 25A, then the actual choice should be rated for the current circuit breaker 32A to meet the requirements (32A × 0.8 = 25A). 2. Such products have been the State Quality and Technical Supervision as a mandatory product safety certification, it should be selected in the purchase of electrical product safety certification, the Great Wall logo of the product. Circuit breakers produced by different manufacturers due to differences in production management, manufacturing processes, product quality is still different, so when the purchase