ISA T2000 - Transformers Selection

DOC. SIE10110 Rev. 6 Page 20 of33
LEVEL1
LEVEL
2
LEVEL 3
FUNCTION
METERS
(continued)
Other
external
None (default)
No extra measurement displayed
Active power
P; W
Reactive power (AC)
Q; VAr
Impedance module
Z, Ohm
Impedance argument
φ, °
Active impedance
component
R, Ohm
Reactive impedance
component (AC)
X, Ohm
Phase, I (AC)
φ, Vmain-Iext; reference Vaux
Phase, V (AC)
φ, Vmain-Vext; reference Vaux
Apparent power (AC)
S; VA
Power factor
p.f. = cos φ(V-I)
Frequency of V (AC)
f, Hz
LEVEL1
LEVEL 2
LEVEL 3
LEVEL 4
FUNCTION
RESULTS
Display
Display selected result
Delete
Delete selected result
Print
Print selected result
CONFIGU-
RATION
Settings
Save to address
1..10
Saves current settings to X
Restore address
1..10
Restores settings from X
Restore default
1..10
Restores default settings
Language
To be specified at order
Display
Speed
Slow
The displayed value is refreshed every
1000 ms
Fast
The displayed value is refreshed every
300 ms
Hold mode
Hold trip
As relay trips, test data measured 4
periods before trip are held.
Hold min
As relay trips, the minimum value
within 0.5 s is held.
Hold max
As relay trips, the maximum value
within 0.5 s is held.
Note: measurements marked AC apply only if both inputs are selected as alternate current.
3.9.2 Transformers selection
With this selection, you can choose the desired type of test. After entering the selection, the
operator can input the relevant parameters, still by using the multi-function knob: turning it allows
changing the parameter; pressing it makes it possible to go to next parameter.
Once all parameters are set, it is possible to start the test and execute it. Test time is kept to the
minimum to avoid the excess of heating. The following table summarizes all tests and the
corresponding performances.
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