Loading (LD)
Purpose: To specify the impedance loading on one segment or a number of
segments. Series and parallel RLC circuits can be generated. In
addition, a finite conductivity can be specified for segments.
Card:
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|LD |I1 | I2 | I3 | I4 | F1 | F2 | F3 | F4 | F5 | F6 |
| | | | | | | | | | | |
| | L | L | L | L | ZLR | ZLI | ZLI | B | B | B |
| | D | D | D | D | | | | L | L | L |
| | T | T | T | T | | | | A | A | A |
| | Y | A | A | A | | | | N | N | N |
| | P | G | G | G | | | | K | K | K |
| | | | F | T | | | | | | |
| The numbers along the top refer to the last column in each field |
| | | | | | | | | | | |
- Parameters:
- Integers
- LDTYP (I1) - Determines the type of loading which is used. The
options are:
- -1 - short all loads (used to nullify previous loads). The remainder of the card is left
blank.
- 0 - series RLC, input ohms, henries, farads.
- 1 - parallel RLC, input ohms, henries, farads.
- 2 - series RLC, input ohms/meter, henries/meter, farads/meter.
- 3 - parallel RLC, input ohms/meter, henries/meter, farads/meter.
- 4 - impedance, input resistance and reactance in ohms.
- 5 - wire conductivity, mhos/meter.
- LDTAG (I2) Tag number; identifies the wire section(s) to be
loaded by its (their) tag numbers. The next two
parameters can be used to further specify certain
segment(s) on the wire section(s). Blank or zero
here implies that absolute segment numbers are being
used in the next two parameters to identify segments.
If the next two paramters ara blank or zero, all
segments with tag LDTAG are loaded.
- LDTAGF (13) - Equal to m specifies the mth segment of the set of
segments whose tag numbers equal the tag number
specified in the previous parameter. If the previous
parameter (LDTAG) is zero, LDTAGF then specifies an
absolute segment number. If both LDTAG and LDTAGF
are zero, all segments will be loaded.
- LDTAGT (14) - Equal to n specifies the nth segment of the set of
segments whose tag numbers equal the tag number
specified in the parameter LDTAG. This parameter
must be greater than or equal to the previous param-
eter. The loading specified is applied to each of
the mth through nth segments of the set of segments
having tags equal to LDTAG. Again if LDTAG is zero,
these parameters refer to absolute segment numbers.
If LDTAGT is left blank, it is set equal to the
previous parameter (LDTAGF).
- Floating Point Input for the Various Load Types
- a. Series RLC (LDTYP = 0)
- ZLR (Fl) - Resistance in ohms, if none, leave blank.
- ZLI (F2) - Inductance in henries, if none, leave blank.
- ZLC (F3) - Capacitance in farads, if none, leave blank.
- b. Parallel RLC (LDTYP = 1), floating point input same as a.
- c. Series RLC (LDTYP = 2) input, parameters per unit length.
- ZLR - Resistance in ohms/meter, if none, leave blank.
- ZLI - Inductance in henries/meter, if none, leave blank.
- ZLC - Capacitance in farads/meter, if none, leave blank.
- d. Parallel RLCRLC (LDTYP = 3), input parameters per unit length,
floating point input same as c.
- e. Impedance (LDTYP = 4)
- ZLR - Resistance in ohms.
- ZLI - Reactance in ohms.
- f. Wire conductivity (LDTYP = 5)
- ZLR - Conductivity in mhos/meter.