Datasheet

Theory of operation STPMC1
48/77 Doc ID 15728 Rev 7
Equation 11
● iN MOM: 16-bit momentary value of neutral current
Note: In systems 3-phase, no neutral, u
ST
, u
TR
, u
RS
replace u
R
, u
S
, u
T
respectively.
9.17.3 Group 2 data records
2.1 DER:
● uR RMS: 12-bit RMS value of R phase voltage
● iR RMS: 16-bit RMS value of R phase current
2.2 DES:
● uS RMS: 12-bit RMS value of S phase voltage
● iS RMS: 16-bit RMS value of S phase current
2.3 DET:
● uT RMS: 12-bit RMS value of T phase voltage
● iT RMS: 16-bit RMS value of T phase current
2.4 DEN:
● uN RMS: 12-bit RMS value of voltage channel of NDSP. It may be DAN-V or DAH
according to the value of ENH
bit.
● iN RMS: 16-bit RMS value of neutral current
Note: In systems 3-phase, no neutral, U
ST
, U
TR
, U
RS
replace U
R
, U
S
, U
T
respectively.
RMS
X
4
i
sIRMS
⎟
⎠
⎞
⎜
⎝
⎛
=
∑
Figure 16. Group 2 data records
DER
parity iR RMSuR RMS
DES
DET
DEN
parity iS RMS
uS RMS
parity iT RMS
uT RMS
parity iN RMSuN RMS
12 bit4 bit 16 bit
DER
parity iR RMSuR RMSparity iR RMSuR RMS
DES
DET
DEN
parity iS RMS
uS RMS
parity iS RMS
uS RMS
parity iT RMS
uT RMS
parity iT RMS
uT RMS
parity iN RMSuN RMSparity iN RMSuN RMS
12 bit12 bit4 bit4 bit4 bit 16 bit16 bit
DER
parity iR RMSuR RMS
DES
DET
DEN
parity iS RMS
uS RMS
parity iT RMS
uT RMS
parity iN RMSuN RMS
12 bit4 bit 16 bit
DER
parity iR RMSuR RMSparity iR RMSuR RMS
DES
DET
DEN
parity iS RMS
uS RMS
parity iS RMS
uS RMS
parity iT RMS
uT RMS
parity iT RMS
uT RMS
parity iN RMSuN RMSparity iN RMSuN RMS
12 bit12 bit4 bit4 bit4 bit 16 bit16 bit