**Parameter**;**Datatype**;**Value Range**;**Explanation**
name;string;;name of the external grid
bus*;integer;;index of connected bus
vm_pu*;float;:math:`>` 0;voltage set point [p.u]
va_degree*;float;;angle set point [degree]
max_p_mw**;float;;Maximum active power
min_p_mw**;float;;Minimum active power
max_q_mvar**;float;;Maximum reactive power
min_q_mvar**;float;;Minimum reactive power
s_sc_max_mva***;float;:math:`>` 0;maximum short circuit power provision [MVA]
s_sc_min_mva***;float;:math:`>` 0;minimum short circuit power provision [MVA]
rx_max***;float;0...1;maxium R/X ratio of short-circuit impedance
rx_min***;float;0...1;minimum R/X ratio of short-circuit impedance
r0x0_max****;float;0...1; maximal R/X-ratio to calculate Zero sequence internal impedance of ext_grid         
x0x_max****;float;0...1;  maximal X0/X-ratio to calculate Zero sequence internal impedance of ext_grid
in_service*;boolean;True / False;specifies if the external grid is in service.