SA9602M
For example, a meter manufacturer may wish to build
(a)
(b)
Meter rated for 230V/80A, 1000 pulses/kWh
Meter rated for 230V/40A, 1000 pulses/kWh
If the LED output pulse rate is considered, then
(a) 230V/80A, R1=1 and R0=0
The table of Rated Condition Select shows that for this case the frequency for the
LED output at rated conditions is 5.11Hz.
Hence,
VI
fp
230 x 80
5.11
1 pulse =
=
3600 Ws
˜
(b)
230V/40A, R1=0 and R0=0
The table of Rated Condition Select shows that in this case the frequency for the
LED output at rated conditions in 2.55Hz
Hence,
VI
fp
230 x 40
2.55
1 pulse =
=
3600 Ws
˜
As the examples shows, the SA9602M can be configured easily for use in meters
for different rated systems. The only changes which must be implemented are:
selection of current sense resistors for the expected rated load current; and
selection of settings for R0 and R1.
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