Local Operation
3-9
Figure 3-6 The Relationship of PF and CF
Table 3-1 Maximum and Minimum Values of PF in Different CF
CF
PFmax
PFmin (50V
rms
)
PFmin (100V
rms
)
PFmin (200V
rms
)
1.5
0.993
0.992
0.982
0.977
2.0
0.849
0.668
0.634
0.617
2.5
0.703
0.408
0.373
0.356
3.0
0.593
0.266
0.234
0.219
3.5
0.511
0.186
0.158
0.144
4.0
0.449
0.138
0.113
0.100
4.5
0.399
0.107
0.084
0.073
5.0
0.360
0.085
0.065
0.055
If users choose BOTH mode(please refer
section 3.6.1
) in CC mode(please refer
section 3.6
and CP mode(please refer
section 3.8
) under AC load simulation(please refer
section 3.5
),
thus it is needed to input CF and PF values simultaneously.
It is necessary to set CF and PF priority again in BOTH mode. If users’ settings are outside
of the range as in
, 63800 Electronic Load will modify users’ settings
to a reasonable range automatically.
Example 1: (when the priority is CF and the output voltage of UUT is
200V
rms
)
a. If users set CF=1.5 and PF=1, however the allowable PF value with CF=1.5 is from 0.977
to 0.993. The system will use a loading with a PF value close to the allowable PF value, in
this case a PF value of 0.993 will be used.
b. If users set CF=1.5 and PF=0.8, however the allowable PF value reasonable range under
CF=1.5 is from 0.977 to 0.993. The system will use a loading with a PF value close to
the allowable PF value, in this case a PF value of 0.977 will be used.
c. If users set CF=3 and PF=0.1, however the allowable PF value reasonable range under
CF=3 is from 0.219 to 0.593. The system will use a loading with a PF value close to the
allowable PF value, in this case a PF value of 0.219 will be used.
