Functions
3.2 Power Metering
SICAM P38 P39, 3-phase Power Meter with Multi-Tariff function, User Manual
E50417-H8940-C564-
4
, Release Date
06.2018
15
• Current K coefficient K
f
of each phase, a critical index measuring current quality
where, I
h
- effective value of No. h harmonic current (RMS); k - range 1 to 50, configurable with communi-
cation, factory default 50.
• Telephone harmonic form factor (THFF) of each phase
Harmonic interference will generate communication system noise, reducing quality of connection. Consul-
tative Committee of International Telephone and Telegraph (CCITT) measures harmonic interference to
telecommunication using weight coefficient P
h
of noise, expressed with THFF.
where, P
h
- weight coefficient of noise.
3.2
Power Metering
This meter can meter various energy:
• Combined active and supply and demand active energy
• Combined reactive and four-quadrant reactive energy
• Fundamental active power and total harmonic active energy
• Import and export active energy of each phase, combined reactive energy of each phase, fundamental active
energy and harmonic active energy