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9.6 Setting the Comparator Limit Values (Option)
9-16
• Selecting the element (corresponds to column B in the procedure)
• WT210 (760401) no such element setting available;
• WT230 (760502) element can be selected from 1 or 3
• WT230 (760503) element can be selected from 1, 2, or 3
• Selecting the harmonic order (corresponds to column C in the procedure)
Setting range: 01 to 50
Initial value: refer to the following.
The maximum order of harmonic measurement data varies by the fundamental
frequency. Therefore, there might be cases where no measure data is present up
to the 50th order (and the display will show bars). In such a case, even if you
select an harmonic order, determination will not be carried out. Therefore, before
setting, verify the maximum order (chapter 16) and the fundamental frequency of
the object of measurement.
• Setting the limit value
No element setting is available on the WT210.
Setting range: 0.000 to ±9999
Initial setting:
ch1 : V (type) : 1 (element) : 600.0 (value) : E+0 (exponent) [ 600 V voltage
ch2 : A (type) : 1 (element) : 20.00 (value) : E+0 (exponent) [ 20.00 A current
ch3 : P (type)
ch4 : PF (type) : 1 (element) : 1.000 (value) : E+0 (exponent) [ Power factor 1
• Selecting the exponent
The following selections are available. The initial value is as described above.
–3
E–3 (10
), E+0 (10
Note
•
The values of V (voltage), A (current), W (active power), VA (apparent power), var (reactive
power), Vpk (voltage peak), and Apk (current peak) while the MAX hold function (see section
4.8) is enabled will be displayed according to the maximum values (MAX) that are held. The
values that are compared against the limit values are also the maximum values (MAX) that
are held.
•
When you use limit values based on harmonic measurement data, make sure to set the
harmonic measurement function to ON before you set the comparator function ON (see
section 9.8).
•
Although the four relays used in case of normal measurement and in case of harmonic
measurement are the same, the contents of the settings will be kept for both seperately. For
example, even after setting a limit for ch1 in case of harmonic measurement after previously
having set a limit for ch1 in case of normal measurement, will result in keeping both values.
•
The determination method does not change as a result of – (minus) limit values. For
example, if a limit of –1 is set, the relay will not be activated when the input signal value
reaches –2 coming from an even lower value, but will be activated when the input signal
value becomes 0.
•
Make sure to set the polarity of the phase angle as well, + for phase lead (and can be
ignored), – for phase lag.
: 1 (element) : 1.200 (value) : E+3 (exponent) [ 1.2 kW active
0
3
6
), E+3 (10
), E+6 (10
)
limit of element 1 for channel 1]
limit of element 1 for channel 2]
power limit of element 1 for
channel 3]
limit of element 1 for channel 4]
IM 760401-01E
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