master:currenttf parametersPSCAD Current Transformer (Lucas Model)

Every parameter of the PSCAD Current Transformer (Lucas Model) (master:currenttf): 27 names, with the unit, the default and the meaning PSCAD gives each one. Copy a name into parameters().

What master:currenttf is

Current Transformer (Lucas Model) (Current Transformer - Lucas model), a component of PSCAD's Master Library, filed under transformers and reactors.

Definition
master:currenttf
PSCAD name
Current Transformer (Lucas Model)
Category
Transformers and reactors
Parameters
27, in 5 groups; 10 carry a unit
Read from
PSCAD 5.0.0, 2026-11-07

Read and write master:currenttf in Python

import mhi.pscad

pscad = mhi.pscad.connect()              # the PSCAD that is open; launch() starts one
project = pscad.project("my_case")       # a case loaded in the workspace

for comp in project.find_all("master:currenttf"):   # the exact definition, namespace first
    params = comp.parameters()           # every parameter, as PSCAD holds it
    print(str(params["Area"]))           # Area, in m*m

comp = project.find_all("master:currenttf")[0]
comp.parameters(Area="0.013 [m*m]")      # a value that carries a unit is written with it
  • A parameter is named exactly as in the table, letter case included: parameters() gives every one of them in a dictionary, and a name the component does not have is refused.
  • A value that carries a unit comes back as a number whose unit is only in its text, so read it as text first (str(...)) or the unit is lost. PSCAD keeps a written unit as it is given: "2500 [mohm]" stays in mohm.
  • A Choice is read and written as its symbol (the capitals in "Written as"), not as the words PSCAD shows in the dialog.
  • find_all() takes the exact definition only. A wildcard or a bare name without master: comes back empty; the Builder's px_find walks the pages for those.

The Builder's runtime does the same with the unit handled for you: px_get(comp, "Area") and px_set(...), which also records the old value so the case is put back at the end. Getting started shows them.

Main Data

ParameterUnitDefaultDescription
AreaRealm*m6.5e-3AreaCross sectional area of the magnetic materialRange 0.0001 to 0.02
BremnRealT0.0Remanent Flux DensityRange -2 to 2
Curr0RealA0.0Initial Current in CoreAt least 0
FreqRealHz60.0FrequencyRange 50 to 60
NameText··Name for IdentificationEnter a name for identification
NpInteger·1Primary TurnsNumber of turns in primaryRange 1 to 2147483647
NsInteger·320Secondary TurnsNumber of turns in secondaryRange 1 to 1000
PathLRealm0.5Path LengthPath length of the magnetic materialRange 0.1 to 2
SecLRealH0.8e-3Secondary InductanceRange 0.0001 to 0.002
SecRRealohm0.5Secondary ResistanceRange 0.1 to 2
matChoice·SILECTRON_53Magnetic MaterialWritten as CUSTOM (custom), SILECTRON_53 (Silectron 53)

Saturation Characteristics

ParameterUnitDefaultDescription
BkneeRealT1.0Flux Density at Knee PointRange 0.6 to 1.5
CnstB1Real·0.0035Constant-1Range 0.001 to 0.01
CnstB2Real·0.00117Constant-2Range 0.0001 to 0.005
CnstB3Real·3.6e-08Constant-3Range 1E-09 to 1E-07
IndxB2Integer·9Index-2Range 3 to 20
IndxB3Integer·35Index-3Range 20 to 60

Internal Outputs

ParameterUnitDefaultDescription
BoutText··Flux Density
IidelText··Ideal CT Output Current
ImagnText··Magnetizing Current
ItotlText··Total Core Current

Burden

ParameterUnitDefaultDescription
BurLRealH0.8e-3Burden InductanceRange 0.0001 to 0.2
BurRRealohm0.5Burden ResistanceRange 0.1 to 40

Loss Characteristics

ParameterUnitDefaultDescription
CnstE1Real·0.1Eddy Current Loss CoefficientRange 0.001 to 0.5
CnstH2Real·0.1Hysteresis Loss Coefficient-1Range 0.001 to 0.5
CnstH3Real·0.11Hysteresis Loss Coefficient-2Range 0.001 to 0.5
CnstH4Real·3e-05Hysteresis Loss Coefficient-3Range 1E-06 to 0.0001

Related

← master:ct_single Current Transformer (JA Model) · master:db_xfmr_3p2w Duality based 3 phase 2 winding transformer →