Siemens SIPROTEC 7UT613 series User Manual

2 Functions
314
7UT613/63x Manual
C53000-G1176-C160-2
2.22.6 Energy Metering
Metered values for active and reactive power are determined in the background by the
processor system. They can be called up at the front of the device, read out via the
operating interface using a PC with DIGSI, or transferred to a central master station
via the system interface.
2.22.6.1 Energy Metering
7UT613/63x integrates the calculated power which is then made available with the
Measured Values. The components as listed in Table 2-17 can be read out. Note that
„input“ and „output“ are always as seen from the protective object. The signs of the
operating values depend (as for the powers) on the setting at address 1107 P,Q
sign. Work calculation is not possible for single-phase busbar protection.
Energy metering can only be used in situations where a calculation of the power is
possible.
The values are always positively incremented, decrementing does not occur. This
means, for instance, that W
p
+ goes up if the real power is positive and that in the pres-
ence of a negative real power W
p
– goes up, but Wp+ does not go down, etc.
Please be aware that 7UT613/63x is, above all, a protection device. The precision of
the metered values depends on the transformer (normally protection core) and the
device tolerance. The metering is therefore not suited for tariff purposes.
The counters can be reset to zero or any initial value (see SIPROTEC 4 System De-
scription).
Table 2-17 Operational metered values
Operating Hours
Meter
The main protective object is considered to be in operation if a current flows at least
on one side, i.e. if the minimum threshold for detection of a current flow is exceeded,
e.g. for side 1 the threshold PoleOpenCurr.S1 (address 1111). A current which
does not flow into the object from 2 measuring locations is theoretically zero because
no current flows into the protective object.
In busbar protection, the busbar is considered to be in operation if a current flows
through at least one measuring location (i.e. one feeder).
The 7UT613/63x counts the operating hours and outputs them in the measured
values. The upper limit is 999.999 hours (approx. 114 years).
You can define a setpoint for the operating hours for the output of an operational indi-
cation.
Measured Values primary
W
p
+ Real power, output kWh, MWh, GWh
W
p
– Real power, input kWh, MWh, GWh
W
q
+ Reactive power, output kVARh, MVARh, GVARh
W
q
– Reactive power, input kVARh, MVARh, GVARh

Siemens SIPROTEC 7UT613 series Specifications

General

Brand	Siemens
Model	SIPROTEC 7UT613 series
Category	Protection Device
Language	English