47113964.2.023
РЭ
7
Continuation of the Table 3
Reactive power,
per phase (absolute
value)
Q
FA
Q
FB
Q
FC
k
2
·Q
FA
/
Q
phnom
k
2
·Q
FB
/
Q
ph nom
k
2
·Q
FC
/
Q
ph nom
–
–
–
–
–
–
+
+
+
+
+
+
Q
FA
= √(S
A
2
– P
A
2
)
Q
FB
= √(S
B
2
– P
B
2
)
Q
FC
= √(S
C
2
– P
C
2
)
Frequency
f
k
3
·f/f
ном
–
–
–
+
Notes
1 The sign «+» identifies when the function is realized. The sign «–» identifies when the function
is not realized.
2 k
1,
k
2,
k
3
-
resolution
factors.
When configuring the transducer:
- k
1
can be established from 2500 to 5000;
- k
2
can be established from 1000 to 5000;
- k
3
can be established from 20000 to 50000.
3 The index «nom» denotes nominal value
1.2.2 Nominal quantities (voltage, current and power) are given in table 4.
Nominal frequency f
nom
………………… 50 Hz
Nominal power factor:
active ……………………………………….. сos
ϕ
=1
reactive …………………………………….. sin
ϕ
= 1
1.2.3 Operation ranges of input signals are given in table 5.
1.2.4 Limits of intrinsic error
γ
and quantum values are given in table 6.
1.2.5 Variations from influencing magnitudes correspond to table 7.
1.2.6 Error due to distortion of the input signal
When distortion factor vary from 5 up to 30 % for voltage and from 5 up to 50 % for current (for
harmonics to 13th), limits of error are:
±
0.4 % of the fiducial value for measured phase current, line-to-line voltage and line-to-neutral voltage;
±
0.5 % of the fiducial value for measured zero-sequence voltage and zero-sequence current;
±
0.6 % of the fiducial value for measured power.
Note – Input amplitudes shall not exceed 1.2U
nom
∙√
2 and 1.2I
nom
∙√
2.
1.2.7 Error of the inbuilt RTC lies within ± 2.6 second per day. Error of the timestamp setting
doesn’t exceed 10 ms providing that synchronization is operated.
1.2.8 Refresh rate of the data register is 6 Hz.
1.2.9 Time between reception of the request and the beginning information output is no more than 15 ms.
