NEX17 Withdrawable Vacuum Circuit-Breaker Maintenance and Services Guide

This document is a maintenance and services guide for the NEX 17.5 kV withdrawable vacuum circuit-breaker, part of the NEX17 indoor, metal-enclosed medium-voltage switchgear system. It covers recommended maintenance frequencies, operating conditions (including corrosive atmospheres), and specific procedures for control mechanisms, insulating materials, power circuits, low voltage auxiliary circuits, circuit-breaker maintenance, and Sepam protection relay maintenance.