Multi-Tech Systems 7600 User Manual
Supply Voltage Dips
ION 7500 / ION 7600 User’s Guide
Page 310
Power Quality: ION Meters and EN50160 Technical Note
Supply Voltage Dips
The voltage dip is based on half-cycle RMS measurements. The duration of the dip
corresponds to the period during which the RMS value remains less than 90% of
the nominal voltage. The depth of the dip is defined as the difference (expressed in
% of nominal voltage) between the minimum RMS voltage over the course of the
dip and the nominal voltage.
corresponds to the period during which the RMS value remains less than 90% of
the nominal voltage. The depth of the dip is defined as the difference (expressed in
% of nominal voltage) between the minimum RMS voltage over the course of the
dip and the nominal voltage.
The observation period is 1 week. No evaluation criteria are suggested by either
the EN 501060 standard or the UNIPEDE Measurement Guide for Voltage
Characteristics; you should apply your own criteria to the data captured by the
meter. The table below defines the classification scheme for counters Nij:
the EN 501060 standard or the UNIPEDE Measurement Guide for Voltage
Characteristics; you should apply your own criteria to the data captured by the
meter. The table below defines the classification scheme for counters Nij:
EN 50160 data (current observation period): The meter maintains the counters
listed in the table above for each phase. These counters are reset on a weekly basis.
listed in the table above for each phase. These counters are reset on a weekly basis.
EN 50160 data (previous observation period): The meter stores the counter values
listed in the table above for each phase on a weekly basis before these counters are
reset. These registers are also stored in a data recorder on a weekly basis.
listed in the table above for each phase on a weekly basis before these counters are
reset. These registers are also stored in a data recorder on a weekly basis.
Events: The meter creates a message in the Event log every time one of the counters
increases.
increases.
Parameter data: The meter can be enabled to record the minimum RMS voltage for
each phase during a dip, the duration of the dip and the timestamp for when the
dip occurred.
each phase during a dip, the duration of the dip and the timestamp for when the
dip occurred.
Voltage Dips Default Measurements
Values from the current observation period (in the first four columns) are found in
Bin modules. They are also logged weekly by Data Recorder modules 19 – 23.
Values from previous observation (PO) period are found in Store modules.
Bin modules. They are also logged weekly by Data Recorder modules 19 – 23.
Values from previous observation (PO) period are found in Store modules.
Depth (d%)
Duration (t)
Duration (t)
10ms <=
t <100ms
t <100ms
100ms <=
t < 500ms
t < 500ms
500ms <=
t < 1s
t < 1s
1s < t < 3s
3s <= t < 20s
20s <= t <
1min
1min
10 < d < 15
N
11
N
21
N
31
N
41
N
51
N
61
15 <= d < 30
N
12
N
22
N
32
N
42
N
52
N
62
30 <= d < 60
N
13
N
23
N
33
N
43
N
53
N
63
60 < d <99
N
14
N
24
N
34
N
44
N
54
N
64
Register Labels
V1-Dip N11
V1-Dip N12
V1-Dip N13
V1-Dip N14
PO V1-Dip N11
PO V1-Dip N12
PO V1-Dip N13
PO V1-Dip N14
V1-Dip N21
V1-Dip N22
V1-Dip N23
V1-Dip N24
PO V1-Dip N21
PO V1-Dip N22
PO V1-Dip N23
PO V1-Dip N24
V1-Dip N31
V1-Dip N32
V1-Dip N33
V1-Dip N34
PO V1-Dip N31
PO V1-Dip N32
PO V1-Dip N33
PO V1-Dip N34
V1-Dip N41
V1-Dip N42
V1-Dip N43
V1-Dip N44
PO V1-Dip N41
PO V1-Dip N42
PO V1-Dip N43
PO V1-Dip N44
V1-Dip N51
V1-Dip N52
V1-Dip N53
V1-Dip N54
PO V1-Dip N51
PO V1-Dip N52
PO V1-Dip N53
PO V1-Dip N54