Configure Secondary Circuit Analysis

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. Secondary Circuit Analysis helps designers calculate:

  • kVA load on a transformer

  • Voltage flicker due to motor starting

  • Voltage drops through transformers and along secondary and service lines

Secondary Circuit Analysis provides additional calculation options by:

  • implementing maximum fault calculation

  • entering transformer impedance as a percent (using nameplate kVA as base) plus X/R ratio

  • automatically populating transformer impedance from a lookup table, based on nameplate kVA, single-phase or three-phase, low-side voltage and pad-mount vs. pole-mount

The following tables must exist in your geodatabase (see Configuring Analysis Tools). Import them in Access, not ArcCatalog. For more information about how to use the sample tables provided, see Configuring Analysis Tools.

  • MMENG_TRANSFORMER

  • MMENG_CONDUCTOR_ELEC

  • ArcFM System Tables

To enable Secondary Circuit Analysis, assign model names as follows:

Class Model Names

Feature (object) class

Model name

ConductorInfo

CONDUCTORINFO

OH | UG secondary

FEEDERSECONDARY

Service Point

SERVICEPOINT

Transformer

TRANSFORMER

MMENG_TRANSFORMER

MMSECCKTTRANSFORMERLOOKUP

MMENG_CONDUCTOR_ELEC

MMSECCKTCONDUCTORLOOKUP

All ArcFM System Tables

ARCFMSYSTEMTABLE

Field Model Names

Conductors with FeederSecondary model name

Field

Model name

MeasuredLength

MEASUREDLENGTH

ConductorInfo

Field

Model name

ConductorMaterial

CONDUCTORMATERIAL

ConductorSize

CONDUCTORSIZE

InsulationType

INSULATIONTYPE

ServicePoint

Field

Model Name

ServiceCurrentRating

SERVICECURRENTRATING

Transformer

Field

Model Name

FacilityID

FACILITYID

GroundReactance

GROUNDREACTANCE

GroundResistance

GROUNDRESISTANCE

LowSideVoltage

LOWSIDEVOLTAGE

RatedkVA

RATEDKVA

MMENG_TRANSFORMER table

Field

Model Name

Code

MMSECCKTCODE

Cost

MMSECCKTCOST

CUCode

MMSECCKTCUCODE

Description

MMSECCKTDESCRIPTION

FULL_LOAD_LOSS_MIN

MMSECCKTTRANSFORMERFULLLOADLOSSMIN

FULL_LOAD_LOSS_MAX

MMSECCKTTRANSFORMERFULLLOADLOSSMAX

KVA

MMSECCKTTRANSFORMERKVA

NOLOAD_LOSS_MIN

MMSECCKTTRANSFORMERNOLOADLOSSMIN

NOLOAD_LOSS_MAX

MMSECCKTTRANSFORMERNOLOADLOSSMAX

PERCENT_Z_MAX

MMSECCKTTRANSFORMERMAXZ

PERCENT_Z_MIN

MMSECCKTTRANSFORMERMINZ

Phasing

MMSECCKTTRANSFORMERPHASES

X_TO_R_MAX

MMSECCKTTRANSFORMERMAXXTOR

X_TO_R_MIN

MMSECCKTTRANSFORMERMINXTOR

MMENG_CONDUCTOR_ELEC table

Field

Model Name

Ampacity

MMSECCKTAMPACITY

Code

MMSECCKTCODE

CondSize

MMSECCKTSIZE

Cost_PerUnitLength

MMSECCKTCOST

CUCode

MMSECCKTCUCODE

Description

MMSECCKTDESCRIPTION

Insulation

MMSECCKTINSULATION

Material

MMSECCKTMATERIAL

R_Per1000_Units_Length

MMSECCKTR_PER1000UNITSLENGTH

R0_Per1000_Units_Length

MMSECCKTR0_PER1000UNITSLENGTH

Underground

MMSECCKTUNDERGROUND

X_Per1000_Units_Length

MMSECCKTX_PER1000UNITSLENGTH

X0_Per1000_Units_Length

MMSECCKTX0_PER1000UNITSLENGTH

Configuring with a Denormalized Data Model

Secondary Circuit Analysis relies on a banked feature class with the model name TRANSFORMER assigned. On this feature class, it looks for a field with the field model name RATEDKVA assigned.

In your denormalized data model, you may have a Transformer feature class with multiple RatedKVA fields. Each of these fields may have a field model name similar to these: RATEDKVA_1, RATEDKVA_2, RATEDKVA_3. Secondary Circuit Analysis relies on one RatedkVA field. You must have a single RatedKVA field that sums the RatedKVA of the units. It must also carry the field model name RATEDKVA.

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