The properties for the fault object are as follows:




Property

Description

phases

Number of Phases. Default is 1.

bus1

Name of first bus. Examples: 
bus1=busname
bus1=busname.1.2.3

bus2

Name of 2nd bus. Defaults to all phases connected to first bus, node 0, if not specified. (Shunt Wye to ground connection)

R

Resistance, each phase, ohms. Default is 0.0001. Assumed to be Mean value if gaussian random mode.Max value if uniform mode. A Fault is actually a series resistance that defaults to a wye connection to ground on the second terminal. You may reconnect the 2nd terminal to achieve whatever connection. Use the Gmatrix property to specify an arbitrary conductance matrix.

Gmatrix

Use this to specify a nodal conductance (G) matrix to represent some arbitrary resistance network. Specify in lower triangle form as usual for DSS matrices.

MinAmps

Minimum amps that can sustain a temporary fault. Default is 5.

ONtime

Time (sec) at which the fault is established for time varying simulations. Default is 0.0 (on at the beginning of the simulation)

pctperm

Percent of failures that become permanent. (not currently used)

Temporary

{Yes | No} Default is No. Designate whether the fault is temporary. For Time-varying simulations, the fault will be removed if the current through the fault drops below the MINAMPS criteria.

%stddev

Percent standard deviation in resistance to assume for Monte Carlo fault (MF) solution mode for GAUSSIAN distribution. Default is 0 (no variation from mean).


Standard Inherited Properties (may not apply to all Fault elements)


Property

Description

normamps

Normal rated current.

emergamps

Maximum current.

basefreq

Base Frequency for ratings.

faultrate

No. of failures per year. This property can be used by such things as a monte carlo fault study to specify how often this fault is likely to occur.

repair

Hours to repair.

enabled

{Yes|No or True|False} Indicates whether this element is enabled.

like

Make like another object, e.g.: 
New Fault.F2 like=F1 ...