Secondary Circuit Analysis Tables

Secondary Circuit Analysis is an electrical calculation (available in Designer) to easily perform "what-if" 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 non-blank insulation type is taken to imply an underground (non-blank value) or an overhead (blank value) conductor. Typical values (besides a blank value): XLP, Poly.		Used to determine the inter-conductor 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 single-phase circuit with neutral return, or as a balanced 3-phase 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.