低压配电线路保护和保护电器选择(Ⅰ)

Protection for Low Voltage Distribution Circuits and Selection for Protective Devices

本文简要介绍新修订的《低压配电设计规范》关于配电线路保护的主要内容,着重阐述了实施配电线路保护的关键是对保护电器的正确选择和整定。文章系统地分析了保护电器整定必须考虑的三个问题,对每个问题提出了基本要求,阐明了设计、计算和校验方法。具有指导作用和实际应用价值。

This paper concisely introduces the main contents of protection for distribution circuit in newly issued ?code for design of Low-voltage electrical installations (GB 50054-95), emphatically elaborates the key to implement protection for distribution circuit is the correct selection and setting for protective device. The paper systematically analyses three questions that must considered in setting for protective device, puts torward essential demands respectively, expounds the design, calculation and calibration methods and has practical value.