Analog Outputs
239
7UM62 Manual
C53000-G1176-C149-3
2.37
Analog Outputs
2.37.1 Functional Description
Depending on the variant ordered, the 7UM62 machine protection can have up to four
analog outputs (plug-in modules on ports B and D). The values to be transmitted via
these interfaces have been specified during the configuration of the scope of
protection functions (see Section 2.2). A maximum of four of the following analog
outputs are available.
•
Measured positive sequence current I
1
in percent of the rated operational current;
•
Measured negative sequence current I
2
in percent of the rated operational current;
•
Measured positive sequence voltage U
1
in percent of the rated voltage;
•
Measured value |P| (absolute value of active power) in percent of the rated
operational apparent power
√
3·U
N
·I
N
,
•
Measured value |Q| (absolute value of reactive power) in percent of the rated
operating apparent power
√
3 ·U
N
·I
N
,
•
Measured value frequency f in percent of the nominal frequency,
•
Measured value |cos
ϕ
| (absolute value of power factor) in percent, referred to 1.00,
•
Measured value rotor temperature
Θ
R
/
Θ
R max
in percent of the maximum
permissible rotor temperature,
•
Measured value stator temperature
Θ
S
/
Θ
S TRIP
in percent of the tripping
temperature.
Operating nominal quantities are the nominal values set at addresses
and
SN GEN/MOTOR
(see also Section 2.3).
For measured values that can be negative (power, power factor), absolute values are
formed and output.
Analog values are output as load-independent currents. The analog outputs have a
nominal range between 0 mA and 20 mA, their operating range can be up to 22.5 mA.
The conversion factor and the scope of validity are set.
2.37.2 Setting Hints
General
You have specified during the configuration of the analog outputs (Section 2.2,
addresses
0173
through
) which of the analog inputs available will be used for
what measured values. Set
Disabled
if a function is not needed. The other
parameters associated to that analog output are masked out in that case.
Measured Values
If you have selected measured values for the analog outputs (Section 2.2, addresses
through
), you specify for the available outputs the conversion factor and
the range of validity; these are
