MOCB	Minimum oil circuit breaker
SF6	Sulfur hexafluoride
Al2O3	Aluminum oxide (alumina)
CCTO	Calcium copper titanium oxide (CaCu3Ti4O12)
ZnO	Zinc oxide
DDF	Dielectric dissipation factor
SiO2	Silicon dioxide
TiO2	Titanium dioxide
MCB	Miniature circuit breaker
MCCB	Molded case circuit breaker
wt%	Weight percentages
N-GS	Amorphous graphene nanosheets
MONF	Mineral oil nanofluid samples
EONF	Synthetic ester oil nanofluid samples
MO	Mineral oil
EO	Ester oil
Fe3O4	Iron oxide
R1	Radius of oil molecules
R2	Radius of oil molecules after good dispersion
J	Current density
σ	Electrical conductivity
Je	Externally generated current density
E	Electric field strength
V	Electrical potential
Vo	Boundary electrical potential of the fixed contact
Q	Heating source
ρ	Fluid density
Cp	Fluid heat capacity at constant pressure
kc	Fluid thermal conductivity
u	Fluid velocity field
T	Dependent variable temperature in the model
Qe	Heating source term
ΔT	Temperature difference between oil molecules
U	Internal energy inside MOCB