Secondary Circuit Analysis Tables
Secondary Circuit Analysis is an electrical calculation (available in Designer) to easily perform "whatif" scenarios and determine which type of equipment will maximize the network's performance and minimize costs. Below are descriptions of the tables and fields required for Secondary Circuit Analysis. These tables must be owned by SDE.
MMENG_CONDUCTOR_ELEC
Field 
Data Type 
Description 
Units 
How Used 

ID 
long integer 
A unique ID identifying the row in the table. 


Code 
text 
A unique value for GIS features. 

Serves as a lookup key when mapping GIS features onto rows in this table. 
CUCode 
text 
Not currently used. 


Description 
text 
A description of the conductor feature. 


R_Per1000_Units_Length 
double 
Positive sequence resistance per 1000 units length. 


X_Per1000_Units_Length 
double 
Positive sequence reactance per 1000 units length. 


Ampacity 
double 
Continuous current carrying capacity, in Amperes. 


R0_Per1000_Units_Length 
double 
Zero sequence resistance per 1000 units length. 


X0_Per1000_Units_Length 
double 
Zero sequence reactance per 1000 units length. 


Cost_PerUnitLength 
double 
Material cost per unit length of the conductor, in local currency. This value must be greater than 0. 


Material 
text 
Contains the conductor material (such as AL, CU, ACSR). 


Size_ 
text 
The diameter of the conductor. 
in. 

Underground 
short integer 
A yes/no value indicating whether the conductor is underground or overhead. Yes=Underground, No=Overhead. 


Insulation 
text 
Contains the type of insulation used by the conductor. The presence or absence of a nonblank insulation type is taken to imply an underground (nonblank value) or an overhead (blank value) conductor. Typical values (besides a blank value): XLP, Poly. 

Used to determine the interconductor spacing that is assumed. 
MMENG_CONDUCTOR_ELEC_ORIG
This table is for internal use only.
MMENG_TRANSFORMER
Field 
Data Type 
Description 
Units 
How Used 

ID 
long integer 
A unique ID identifying the row in the table. 


Code 
text 
A unique ID for GIS features. 

Serves as a lookup key when mapping GIS features onto rows in this table. 
CUCode 
text 
Not currently used. 


Percent_Z_Min 
double 
Minimum impedance, as percent of rated kVA 


Percent_Z_Max 
double 
Maximum impedance, as percent of rated kVA 


Percent_X_Min 
double 
Not currently used by Secondary Circuit Analysis. 


Percent_X_Max 
double 
Not currently used by Secondary Circuit Analysis. 


Percent_R_Min 
double 
Not currently used by Secondary Circuit Analysis. 


Percent_R_Max 
double 
Not currently used by Secondary Circuit Analysis. 


NoLoad_Loss_Min 
long integer 
Not currently used by Secondary Circuit Analysis. 


NoLoad_Loss_Max 
long integer 
Not currently used by Secondary Circuit Analysis. 


Full_Load_Loss_Min 
long integer 
Not currently used by Secondary Circuit Analysis. 


Full_Load_Loss_Max 
long integer 
Not currently used by Secondary Circuit Analysis. 


EX_Min 
double 
Not currently used by Secondary Circuit Analysis. 


EX_Max 
double 
Not currently used by Secondary Circuit Analysis. 


X_to_R_Min 
double 
Ratio of reactance to resistance, for the maximum impedance value. 


X_to_R_Max 
double 
Ratio of reactance to resistance, for the minimum impedance value. 


Description 
text 
A description of the transformer feature. 


Phasing 
text 
The number of phases on the transformer (1 or 3). 

This value determines whether the secondary circuit will be modeled as a singlephase circuit with neutral return, or as a balanced 3phase circuit. 
kVA 
double 
The nameplate kVA rating of the transformer. 


Type_ 
text 
Indicates the type of transformer. Typical values: pole, pad, pad mounted, pad mounted network, pole stepdown, deadfront pad mounted. 


High_Side_Voltage 
text 
The amount of voltage coming into the transformer. 


Low_Side_Voltage 
text 
The amount of voltage leaving the transformer. 


Cost 
double 
Material cost of the transformer, in local currency. 
local currency 

Min_R_Per1000_Units_Length 
double 
Positive sequence resistance per 1000 units length. Used for calculations that wish to err on the side of underestimating conductor impedance. 

Used by Design Optimization for fault calculations. 
Min_X_Per1000_Units_Length 
double 
Positive sequence reactance per 1000 units length. Used for calculations that wish to err on the side of underestimating conductor impedance. 

Used by Design Optimization for fault calculations. 
MMENG_ TRANSFORMER_ORIG
This table is for internal use only.