JN15-24/31.5 series indoor earthing switch is a new design and improved on the Jnl5 typejthe installing size without any changeLsuitable with electric power system with 20-24KVJhree-phase, AC 50(60)Hz, support with various kinds of HV switchgear and as earthing protection. It is complied with GB1985-2004 and IEC129 standard.
Working condition
1. Ambient temperature： -10X ~ +40°C ；
2.Altitude： W 1000m
3.Relative humidity： Day average relative humidity w 95%；
Month average relative humidity w 90沧
4.Earthquake intensity： w 8degree；
5. Class of pollution： II
