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.

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