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104
NV10P - Manual - 01 - 2015
MEASURES, LOGIC STATES AND COUNTERS
Analog channels
Frequency
f
UL1
,
f
UL12
,
f
UL13
Fundamental component for input phase voltages
U
L1
,
U
L2
,
U
L3
Fundamental component for input phase-to-phase voltages
U
12
,
U
23
,
U
31
Fundamental component for measured residual voltage
U
E
Fundamental component for calculated residual voltage
U
EC
Fundamental component for positive sequence voltage
U
1
Fundamental component for negative sequence voltage
U
2
Frequency rate of change
df
/
dt
Digital channels
Binary inputs
Output relays
COMTRADE
Records are recorded in COMTRADE format; (Common Format for Transient Data); This is a standard
for the data exchange for various types of tests or simulation datas, etc, for power system applica-
tions.
The measurements are recorded in ASCII or BINARY format. COMTRADE fi les always come by
pairs:
The “.CFG”-fi le describing the confi guration: number of analog and digital channels, sampling rate,
scale factors, etc.
The “.DAT”-fi le containing the data
The COMTRADE is part of IEC 60255-24 standard.
The recording can be analyzed by mean of ThySetter sw or any other standard compliant viewer.
The record quantity (max 400 records) is depending on settings of following parameters:
Pre-trigger and post-trigger times
Number of allocated channels.
By means of the following formula the record quantity may be evaluated:
where:
N
: record quantity
v
i
: sampled measures
v
RMS
: analog measures (RMS)
n
B
: logic variables
t
pre
: pre-trigger time interval
t
post
: post-trigger time interval
f
: frequency
Example 1
With the following setting:
Pre-trigger:
0.25
s
Post-trigger:
0.25 s
Sampled measures:
u
L1
,
u
L2
,
u
L3
,
u
E
Analog measures:
U
L1
,
U
L2
,
U
L3
,
U
E
Logic variables:
K1, K2, K3, K4, K5, K6, IN1, IN2
180 record can be stored if f = 50 Hz
Example 2
With following setting:
Pre-trigger:
0.25
s
Post-trigger:
02.5 s
Sampled data:
u
L1
,
u
L2
,
u
L3
,
u
E
Analog measures:
U
L1
,
U
L2
,
U
L3
,
U
E
Digital channels:
K1, K2, K3, K4, K5, K6, IN1, IN2
up to 150 records can be stored if f = 60 Hz
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N
= int
(34 + 20
v
i
+ 4
v
RMS
+
n
B
)·(
t
pre
+
t
post
)
12000
·
f
(Hz)
50 (Hz)
N
= int
(34 + 20
v
i
+ 4
v
RMS
+
n
B
)·(
t
pre
+
t
post
)
12000
·
f
(Hz)
50 (Hz)
