Siemens SIPROTEC 6MD665, Manual

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2 Functions
38
6MD665 Manual
C53000-G1876-C103-3
2.4.5.4 Information
2.4.6 Measurement 1phase 1.packet
This packet serves to perform a monophase measurement (current and voltage).
The measuring results of the phase current and the phase voltage are r.m.s. values of
the corresponding fundamental component.
2.4.6.1 Description
The phase current is set to the current input of the measuring transducer, whereas
the phase voltage is set to the voltage input.
The r.m.s. values calculated from these two input signals, the active power, the
reactive power, the apparent power, the cos
Φ
, the sin
Φ
and
Φ
the linked sizes
and frequency calculated from the voltage (see information overview) are then
present at the measuring transducer output.
The frequency is determined from the applied phase voltage. If the secondary input
voltage on the device falls below 10 V
eff
, the frequency is marked as invalid. The over-
flow occurs when the secondary input voltage on the device exceeds 120 V
eff
. The
rated value of the frequency is taken from
3RZHU6\VWHP'DWD
.
Routing of the measurement inputs to the respective measured value channels Phase
current and Phase voltage and the routing of the measuring results is performed with
DIGSI
®
.
Specifications for secondary transformer current and secondary transformer voltage
are made in the properties dialog box of
083B
.
Information on allocation can be obtained from the SIPROTEC
®
system description /
1/.
2.4.6.2 Configuration Notes
6HF9ROWJ1RP9DO
The factory-preset rated transformer voltage can be set in the predefined range.
6HF&XUU1RP9DO
The secondary factory-preset rated transformer current can be set in the predefined
range.
No. Message Type of Information Description
- MwCh_I MK Current Input I
- I MW Current I
- f MW frequency