GE Multilin MIWII Instruction Manual page 137

9 RELAY COMMISSIONING 9.2 COMMENTS ON THE TEST EQUIPMENT
In case of using AC voltage for the activation of digital inputs, and having connected the inputs common (A10)
with the ground terminal, it is necessary to remove this connection before testing insulation on group 3.
9
GEK-113308 MIWII Directional Power Protection System 9-3