Metal Oxide Surge Arrestor

 Arrester Name

Text

Just an identifier. A name should be entered here to avoid compilation warnings

Arrester Voltage Rating

REAL

Constant

The arrestor voltage rating. This input is used as a factor to scale the voltage axis of the arrester characteristics [kV]

# of Parallel Arrester Stacks

REAL

Constant

The number of parallel arrestor stacks. This input is used as a factor to scale current axis of the arrestor characteristics. The default 1.0 but may be increased if the energy absorbed is observed excessive for a given test.

Enable Non-linear Characteristic

INTEGER

Variable

Enter 1 for complete non-linear characteristics (enable)or 0 for fixed slope (disable). To speed up the initialization process, set this value to 0 initially and later change it to 1. The energy function is cleared when disabled

I-V Characteristic

Choice

Select Default, User defined (table) or User defined (external data file). See Arrestor I-V Characteristic Data for more details

File Name

Text

Enter the file name of the file containing the I-V transfer function coordinates. This input is used with Pathname to the Datafile is Given as below. This input is enabled only if I-V Characteristic | User defined (external data file) is selected

Path to the Data File is Given As

Choice

Select Relative or Absolute Pathname.

Click on Relative Pathname if you are giving the File Name relative to the current working directory. Use Absolute Pathname if you are giving the File Name as an absolute path (Ex. C:\filename). This input is enabled only if I-V Characteristic | User defined (external data file) is selected

Maximum Number of Points in the File

Integer

Literal

The actual number of points may be less than this number. This parameter is enabled only if I-V Characteristic | User defined (external data file) is selected.

Label for Current [kA]

Output

Name for arrestor current [kA]

Label for Energy [kJoules]

Output

Name for total arrestor energy [kJ]

 Point # - Current

REAL

Constant

The I coordinates of the user defined I-V characteristic. Up to eleven points may be entered. If less than eleven points are desired, enter 0.0 for the remaining points. This input is enabled only if I-V Characteristic | User defined (table) is selected [kA]

NOTE: Do not enter the first I coordinate point as 0.0 as the default characteristic will then be used

Point # - Voltage in pu

REAL

Constant

The V coordinates of the user defined I-V characteristic. Up to eleven points may be entered. If less than eleven points are desired, enter 0.0 for the remaining points. This input is enabled only if I-V Characteristic | User defined (table) is selected [pu]

NOTE: Do not enter the first V coordinate point as 0.0 as the default characteristic will then be used