2.45.2 Measurements
Display of
Measured Values
Table 2-19
Conversion Formulae between Secondary Values and Primary/Percentage Values
Measured Val. Secondary
I
, I
,
I
L1 S2
L2 S2
sec S2
I
,
L3 S2
I
, I
1 S2
2 S
3I
0 S2
I
, I
,
I
L1 S1
L2 S1
sec S1
I
,
L3 S1
I
I
EE 1
EE1 sec
I
I
EE S2
EE2 sec
U
, U
,
U
L1E
L2E
L-E sec.
U
,
L3E
U
0
U
, U
1
2
U
, U
,
U
L1-L2
L2-L3
LL sec.
U
L3-L1
7UM62 Manual
C53000-G1176-C149-3
A series of measured values and the values derived from them are constantly
available for call up on site, or for data transfer (See Table 2-19, as well as the
following list).
The operational measured values listed in Table 2-19 can be read out as secondary,
primary or percent values. A precondition for correctly displaying the primary and
percentage values is complete and correct entry of the nominal values for the current
transformers, and protected equipment, in accordance with Subsections 2.3 and 2.5.
Table 2-19 lists the formulae for the conversion of secondary into primary or
percentage values.
Depending on the version ordered, the type of device connection and the configured
protective functions, only a part of the operational measured values listed in Table 2-
19 may be available. The displacement voltage 3U
voltages: 3U
= |U
+ U
0
L1
connected for this.
Primary
IN–PRI I–CT S2
⋅
-------------------------------------------- - I
IN–SEC I–CT S2
IN–PRI I–CT S1
⋅
-------------------------------------------- - I
sec S1
IN–SEC I–CT S1
⋅
FACTOR IEE1
I
EE1 sec
⋅
FACTOR IEE2
I
EE2 sec
UN–VT PRIMARY
---------------------------------------------------------- - U
UN–VT SECONDARY
UN–VT PRIMARY
---------------------------------------------------------- - U
=
UN–VT SECONDARY
+ U
|. All three voltage inputs must be phase-ground
L2
L3
sec S2
⋅
L-E sec
⋅
LL sec
Auxiliary Functions
is calculated from the phase-earth
0
%
I
prim. S2
------------------------------------------------------------------------------------------------------------------ - 100
⁄
(
⋅
SN GEN/MOTOR
3 UN GEN/MOTOR
Diff. protect. for generators/motors:
I
prim. S1
------------------------------------------------------------------------------------------------------------------ - 100
⁄
(
⋅
SN GEN/MOTOR
3 UN GEN/MOTOR
Diff. protect. for 3-phase transformer:
I
prim. S1
----------------------------------------------------------------------------------------- - 100
⁄
(
⋅
SN TRANSF
3 UN WIND.S1
I
EE1 prim
.
------------------------------------------------------------------------------------------------------------------ - 100
⁄
(
⋅
SN GEN/MOTOR
3 UN GEN/MOTOR
I
EE2 prim.
------------------------------------------------------------------------------------------------------------------ - 100
⁄
(
⋅
SN GEN/MOTOR
3 UN GEN/MOTOR
U
prim.
-------------------------------------------------------------- - 100
⁄
(
UN GEN/MOTOR
U
prim.
⋅
---------------------------------------------- - 100
UN GEN/MOTOR
⋅
)
⋅
)
⋅
)
⋅
)
⋅
)
⋅
)
3
289