本指南旨在为空气开关用户提供一种方法，用于确定激励的大小以及电阻和电容电流，这些电流可以通过喇叭间隙、垂直断路空气开关在室外位置成功中断，空气开关安装在正常水平竖直位置，且未配备中断辅助装置。每个开关的最小中心线到中心线相位间隔基于ANSIC37中规定的尺寸。32-1972[B1]1，表5，第6栏。本指南假设开关应用于有效接地的Y形三通系统。 目前正在考虑一份不接地系统指南。

This guide is intended to provide air switch users with a means for determining the magnitude of excitation as well as resistive and capacitive currents that may be successfully interrupted with horn-gap, vertical-break air switches in outdoor locations mounted in the normal horizontal-upright position and not equipped with interrupting aids. The minimum centerline-to-centerline phase spacing of each switch is based upon dimensions stated in ANSIC37.32-1972 [B1]1, Table 5, Column 6. This guide assumes that the switches are applied to an effectively grounded wye system. A guide for ungrounded systems is being considered.