Metal Oxide Surge Arrester

 Arrester Name

Text

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

Arrester Voltage Rating

REAL

Constant

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

Number of Parallel Arrester Stacks

REAL

Constant

The number of parallel arrester stacks. This input is used as a factor to scale the current axis of the arrester characteristics. The default is 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 Arrester I-V Characteristic Data for more details.

File Name

Text

Enter the 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 arrester current [kA]

Label for Energy [kJoules]

Output

Name for total arrester energy [kJ]

 Point # - Current

REAL

Constant

The Electrical Current (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 Electrical Voltage (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