GE MiCOM P40 Technical Manual page 740

Chapter 26 - Technical Specifications
Where:
'II' Equipment Group: Industrial.
'(2)G' High protection equipment category, for control of equipment in gas atmospheres in Zone 1 and 2.
This equipment (with parentheses marking around the zone number) is not itself suitable for operation
within a potentially explosive atmosphere.
708
P446SV
P446SV-TM-EN-1