Instruments in Zone 2: Live Maintenance on Spurs Ex ic, High-Power Trunk

1. Trunk: protected installation according to IEC 60079-14
2. Spurs: intrinsically safe Ex ic according to IEC 60079-11, -14 and -25
3. Instruments: intrinsically safe Ex ic according to IEC 60079-11, -14 and -25
    

This is a very common application for installations in Zone 2. Intrinsic safety Ex ic enables live work at the instrument. The power supply provides the safe voltage limitation of 24 V. The Segment Protector limits the current. The trunk requires methods of mechanical ignition protection.