Macros > Macro commands and parameters > Macro calculating commands

Purpose:

Calculation of a short circuit according to IEC 60909, for only one node or for the whole network.

If the command is used for only one node, the short circuit is evaluated for that node and the currents of the other branches in the network are available for that situation.

If the command is used for the whole network, only the maximum short circuit currents on the nodes are available.

General notation:

IEC60909 ( Node( ObjectName ), Fault, Ik", Tap )

IEC60909 ( NIL, Fault, Ik", Tap )

On the position of Fault a tekst or a text variable must be inserted. The options are:

'ppp'

: symmetrical fault

'pe'	: phase-earth fault

'pp'	: phase-phase fault

'ppe'

: phase-phase-earth fault

On the position of Ik" a tekst or a text variable must be inserted. The options are:

'max'

: Ik"max (with asynchronous machines)

'min'

: Ik"min (without asynchronous machines)

On the position of Tap a boolean or a boolean variable must be inserted. The options are:

true	: nominal taps

false

: actual taps

After a successful execution the standard objects Network.Result and Object.Result will be equal to 'IEC', otherwise 'NO'.

Examples:

Perform a symmetric IEC calculation with asynchronous machines, with transformer tap changers nominal:

IEC60909 ( Node('MyNode'), 'ppp' , 'max' , true )

Perform a single phase IEC calculation without asynchronous machines for all nodes, with transformer tap changers actual:

Set( fault, 'pe' )

Set( ik, 'min' )

Set( taps, false )

IEC60909 ( NIL, fault, ik, taps )

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