周正波（中国华西企业股份有限公司工程设计公司,成都市 610017）

Brief Analysis of Surge Protective Device for Large High Altitude Air Shower Observatory(LHAASO)

ZHOU Zhengbo(China Huashi Enterprise Company Limited Engineering Design Company,Chengdu 610017，China)

Abstract：Based on an example of model selection and design of the surge protective device(SPD)in the design of distribution system of the Large High Altitude Air Shower Observatory(LHAASO),a major national science and technology infrastructure,the specific methods for model selection and main parameter verification of SPD for low‑voltage distribution system in a high‑altitude environment are introduced in detail.

Key words：high‑altitude environment;surge protective device;backup protection equipment;maximum continuous operating voltage;withstand voltage;electrical clearance;temperature rise;verification

摘　要：结合国家重大科技基础设施高海拔宇宙线观测站（LHAASO）项目工艺配电系统设计中的电涌保护器（SPD）选型设计实例,详细介绍在高原环境中低压配电系统SPD产品选型、主要参数校验的具体方法。

关键词：高原环境；电涌保护器；后备保护装置；最大持续工作电压；耐受电压；电气间隙；温升；校验

中图分类号：TU895                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.04.006