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User Manual – Rev B
FCS Series II
11.8.3.1 MS704 Current Harmonics Limits File
The user can define relative limits for one or more current harmonics. If set, the LxGui will
compare actual harmonic current components against the user defined limits and display pass
or fail in the right hand column. This data is also part of the test report. The current harmonic
limi
a
ocated in the LxGui
application directory. To not set a limit for a s
the
Limits can be defined for each of the five ava
ts c n be set by editing the “MS704_Distortion_Limits.ini” text file l
pecific harmonic component, remove its entry from
INI file or set its value to zero.
ilable power groups. The mapping is as follows:
INI File Section Header
Test Group
MS704_Group_0 TAC
MS704_Group_1 TVF
MS704_Group_2 SAC
MS704_Group_3 SVF
MS704_Group_4 SXF
The total harmonic current distortion level ITHD is set for each group with the enrty “Ithd = nn.n”
where nn.n is the limit in %.
For individual harmonic components, use the keyword, “IHarmLimit_x” where x = 1 through 50.
A sample “MS704_Distortion_Limits.ini” file shipped with LxGui program is shown below.
// Comments can be included for readability.
// Current Distortion Harmonics Limits by Power Group
[MS704_Group_0]
// Const MS_TAC = 0
Ithd = 12.0
IHarmLimit_3 = 65.00
IHarmLimit_5 = 4.00
IHarmLimit_7 = 3.00
[MS704_Group_1]
// Const MS_TVF = 1
Ithd = 12.0
IHarmLimit_3 = 5.00
IHarmLimit_5 = 4.00
IHarmLimit_7 = 3.00
[MS704_Group_2]
// Const MS_SAC = 2
Ithd = 12.0
IHarmLimit_3 = 5.00
IHarmLimit_5 = 4.00
IHarmLimit_7 = 3.00
[MS704_Group_3]
// Const MS_SVF = 3
Ithd = 12.0
IHarmLimit_3 = 5.00
IHarmLimit_5 = 4.00
IHarmLimit_7 = 3.00
[MS704_Group_4]
// Const MS_SXF = 4
Ithd = 12.0
IHarmLimit_3 = 5.00
IHarmLimit_5 = 4.00
IHarmLimit_7 = 3.00
California Instruments
196
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