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.