13
4.2 Additional functions
Along with unidirectional and bidirectional active energies, G1B meters may measure reactive
energy and maximum demand, store registers of up to 16 billing periods in billing profile, measure
instantaneous values and record load profile. Choices for energy measurement and programmable
functions are denoted with letter “F” and two digits in ordering code and are listed in Table 4-3.
Table 4-3 Possible code choices for energy measurement, instantaneous values and load profiles
No.
F - Energy measurement, instantaneous values, load profiles
Code:
FX
X.
Section 2
Energy measurement
Billing and load profile, instantaneous values and maximum demand
F3
Billing and load profile, instantaneous values and maximum demand, reactive energy
F4
DLMS/COSEM protocol
Short name (SN) referencing
-
Logical name (LN) referencing
8
Table 4-4 List of instantaneous values.
12.7.0
Instantaneous RMS voltage (V)
11.7.0
Instantaneous RMS current (A) in phase
15.7.0
Instantaneous active power
|
P
|
(kW)
16.7.0
Instantaneous active power ±P (kW)
3.7.0
Instantaneous reactive power +Q (kvar)
4.7.0
Instantaneous reactive power –Q (kvar)
13.7.0
cos
ϕ
14.7.0
Frequency (Hz)
91.7.0
Instantaneous RMS current (A) in neutral
12.7.124
Instantaneous THD for voltage
11.7.124
Instantaneous THD for current
Harmonics analysis is performed by using a digital band-pass filter, tuned to 50 Hz (narrow band).
Total Harmonic Distortion (THD) for current and voltage is calculated by formulas:
2
2
2
NB
NB
WB
I
I
I
I
THD
−
=
2
2
2
NB
NB
WB
U
U
U
U
THD
−
=
I
WB
– RMS value of current, measured in wide frequency band;
I
NB
– RMS value of current, measured in narrow frequency band (50 Hz);
U
WB
– RMS value of voltage, measured in wide frequency band;
U
NB
– RMS value of voltage, measured in narrow frequency band (50 Hz).
The sample rate is
Fs
= 2184.53 Hz (32768 Hz/15).
Wide band RMS values are measured up to 21st harmonics (21 × 50 Hz = 1050 Hz).
Maximum demand registration is explained in chapter 7.3. For more information about billing
profile refer to chapter 8.1. List of measured instantaneous values is presented in Table 4-4.
Instantaneous data can be readout via all available communication interfaces.
Please note:
meters that do not contain reactive energy registers (Code F3), do not measure
instantaneous reactive power, as well as power factor cos(φ). For more information about load
profile refer to chapter 8.2.
4.3 Sealed button functions
G1B meters may have sealed button, which may perform one of the functions described below.
Choices of sealed button functions are denoted with letter “B” and one digit in ordering code and
are listed in Table 4-5. More about button functions in chapter 6.10.2.
Table 4-5 Possible code choices for sealed button functions
No.
B-sealed Button functions
Code:
BX.
Section 3 Without
-
Billing period reset
B1
Communication unblock for parameterization
B2
Billing period reset and communication unblock for parameterization
B4
Содержание G1B Series
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