Contents - Index

Switch/UM settings


The following table describes the Switch and Universal Machine (UM) settings available in the ATP Settings dialog box:

Switch study
Statistic study: Study with statistic switches. Specify the number of simulation Num>0.
Systematic study: Study with systematic switches. Specify the number of simulation Num>0.
ATPDraw sets the correct sign of NENERG.

Switch controls:
Option Description
ISW If 1, printout of all variable switch closing/opening time to LUNIT6. If 0 (zero), no printout.
ITEST Extra random delay using DEGMIN, DEGMAX and STATFR in STARTUP. Possible values are:
0: Extra random delay for all switches.
1: No random delay.
2: Extra random time delay added to all closing switches.
3: Extra random time delay added to all opening switches.
IDIST Select probability distribution of switch. A value of 0 (zero) means Gaussian distribution and a value of 1 uniform distribution.
IMAX If 1, printout of extrema to LUNIT6 for every energization. If 0 (zero), no such printout.
IDICE Use of standard random generator. A value of 0 (zero) implies computer-dependent random generator and a value of 1 standard random generator.
KSTOUT Extra printed (LUNIT6) output for each energization. Output of time-step loop and variable extrema (if Extralmal values checked). If 0 (zero), extra printed output. If -1, no such output.
NSEED Repeatable MonteCarlo simulations. Possible values are:
0: Every simulation on the same data case will be different.
1: Same result each time the data case is run on the same computer.

Universal machine controls:
Here the user can specify global data to be used with Universal electrical machines in ATP. The selections apply to all universal machines in a circuit.

Automatic or Manual initialization.
Manual:  Terminal quantities of all machines must be specified.
Automatic: Initial conditions calculated by ATP. See section 9D1.5. in the ATP Rule Book for requirements.
Prediction or Compensation based interface.
Prediction: The machine does not appear to be a nonlinear element to the external network. The option is not available for single phase machines.
Compensation: The machine does appear to be a nonlinear element to the external network. Certain rules regarding connecting machines together must be followed. Inclusion of stub lines is often required.
SI or per unit quantities.