~ 9 ~
NOVATEK-ELECTRO
UBZ-304
Table 3.5
–
Measured and Calculated Parameters
Measurement functions
Range
Accu-
racy
Mnemonic
Address
Data transfer
units
Currents
Effective values of phase currents, A
0.5
–
6300
2%
Phase i1
Phase i2
Phase i3
30,
31,
32
The
tenth
of
amperes.
When
working
with measuring
transformers
with
rated
current
over
100A,
the
currents
(measured and
calculated)
in
addition to the
zero
sequence
current (ground
fault)
are
transferred via
RS-232/RS485
in amperes.
Effective value of positive-sequence current, A
0.5
–
6300
2%
Positive si
33
Effective value of zero-sequence current, A
0.3
–
20
2%
Earth i0
34
Negative-sequence current (imbalance), A
0.2
–
200
5%
Revers si
35
Average current per each phase during the
time specified in the parameter "Tm average i"
Average i1
Average i2
Average i3
36,
37,
38
Maximum value of the average current for each
phase obtained since the last download. Reset
of all average values is performed by the
button
RES/MEM/SEL
in case of displaying
the maximum value of average current in any
phase (by indication of the present average
current of the respective phase).
<3 Iсt
> 3 Iсt
2%
10%
Peak i1
Peak i2
Peak i3
39
40
41
Motor starting current (average phase current)
Overload current (average phase current)
Starting time, s
Starting time is the period of time from when
all three-phase current will exceed 1.2 In and
up to the moment when three currents will
drop lower than 1.2 In. Maximum phase
current achieved during this period is the
maximum starting current.
<3 Iсt
> 3 Iсt
0.1
–
600
2%
10%
Start i
Overload i
Start time
42
43
44
Voltage
Effective values of phase voltages (determined
when connecting the neutral conductor to UBZ), V
100
–
300
3V
Phase U1
Phase U2
45
46
Volt
Phase U3
47
Volt
Effective values of line voltages, V
100
–
475
5V
Line U1
Line U2
Line U3
48
49
50
Volt
Positive-sequence voltage, V
100
–
300
3V
Positive sU
51
Negative-sequence voltage, V
3
–
300
3V
Revers sU
52
Zero-sequence voltage (vector sum of three
phase voltages divided by three), (it is defined
when connecting to the neutral wire of UBZ), V
3
–
100
3V
Zero sU
53
Miscellaneous
Time counter of motor operation, day
0
–
999
Time motor
54
Motor insulation resistance
1
, MOhm
0
–
19.9
10%
Insulation
55
Hundreds of kOm
Mains frequency, Hz
45
–
65
1%
Frequency
56
Tenths of Hertz
Hold time before automatic restart
2
, s
0
–
900
1 s
End of AR
57
Second
Time to overload trip (it indicates the time
remaining until shutdown made by thermal
overload protection)
3
, s
0
–
600
1 s
Before OvL
58
Second
Waiting time after overload trip (it indicates
waiting time before permit to start-up blocked by
thermal overload protection)
3
, s
0
–
900
1 s
After OvL
59
Second
Full power
4
, kVA
0
–
5000
5%
Apparent P
60, 61
Dozens of Watts
Active power
4
, kW
0
–
5000
5%
Active P
62, 63
Reactive power
4
, kVA
r
0
–
5000
5%
Reactive P
64, 65
Cosine of angle between voltage and phase
current L1
0
–
1
5%
Cos A
66
Cosine of angle
between voltage
and current *1000
Cosine of angle between voltage and phase
current L2
0
–
1
5%
Cos B
67