Siemens Siprotec 7UM611, Руководство пользователя

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2.35 Ancillary Functions
213
7UM61 Manual
C53000-G1176-C127-3
In addition, the following are be available:
Minimum and
Maximum Values Minimum and maximum values for the positive-sequence components I
1
and U
1
, the
active power P, reactive power Q, in primary values, of the frequency f and of the 3rd
harmonic content in the displacement voltage in secondary values U
3.H
. Included are
the date and time they were last updated. The minimum/maximum values can be reset
via binary inputs or, in the delivery status of the device, also via the F4 function key.
Minimum and Maximum Values: only with version 7UM61**
_
*****
_
3***
Power Metered
Values W
p
, W
q
, metered values of the active and reactive energy in kilowatt, megawatt or gi-
gawatt hours primary or in kVARh, MVARh or GVARh primary, separately according to
the input (+) and output (–), or capacitive and inductive.
The calculation of the operational measured values is also executed during fault. The
values are updated at intervals of
≥
0.3 s and
≤
1 s.
Power Metered Values: only with version 7UM61**
_
*****
_
3***
Transfer of Mea-
sured Values Measured values can be transferred via the interfaces to a central control and storage
system.
Definition of Power Measurement
The 7UM61 uses the generator reference-arrow system. The power output is positive.
Figure 2-80 Definition of Positive Direction of Reference Arrows
The following table shows the operating ranges for synchronous and asynchronous
machines. For this, parameter
1108 ACTIVE POWER
is set to
Generator
. ”Normal
condition" shows the power under normal operating conditions: + means that a posi-
tive power is displayed on the protective device, – means that the power is negative.
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