STPMC1 ST Microelectronics, STPMC1 Datasheet - Page 29

• Manufacturer Part Number: STPMC1
• Description: Programmable poly-phase energy calculator IC
• Manufacturer: ST Microelectronics

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STPMC1
Table 14.
9.10.2
BCS
0
1
Where:
I
Bit BCS is set according to
Tamper conditions
with ( i
Phase sequence is wrong (status bit BSF)
One tamper condition is that phase sequence is not correct. A 3-ph phase status bit BSF
checks the sequence of phases, which, in a three phase system is one of the following:
●
●
●
In one of the above cases BSF is cleared, otherwise bit BSF is set.
Whatever the SYS bits setting (indicating phases presence and configuration), bit BSF is
always calculated, but it is valid only in cases SYS is 0, 1, 2 and 3. In fact in this case all the
three phase voltage signals (u
In cases SYS is 4, 5, 6, 7, only two or one voltage signal are available (u
the sequence cannot be checked. Bit BSF is always set in the status byte, but it must be
ignored.
In standalone application for SYS = 0, 1 or 2 (3-phase systems) bit BSF is available as
output on SDATD pin.
max
I
I
X
X
= I
= I
= 2
R
S
T
R
S
16
X
+ I
+ I
)
R
RMS
T
S
T
S
+ I
SYS = 0, 1, 2, 3, 4, 7
= (i
R
S
T
∑
∑
T
+ I
R
i
i
X
X
+ i
N
RMS
RMS
S
+ i
for SYS = 5, 6
for SYS = 0, 1, 2, 3, 4, 7
T
∑
∑
Table 14
+ i
8
8
I
I
R
Doc ID 15728 Rev 1
N
X
X
, u
)
RMS
S
, u
T
) are available and can be checked, as shown in 0.
7
9
7
9
I
I
S
S
I
I
T
T
9
7
9
7
I
I
S
S
SYS = 5, 6
or
or
Theory of operation
S
and/or u
or
7
9
7
9
I
I
T
T
I
I
T
S
S
), so that
9
7
9
7
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I
I
T
T