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6.20
Analog Outputs (optional)
6.20.1 Method of Operation
6.20.2 Applying the Function Parameter Settings
Measure Values
7SA6 Manual
C53000-G1176-C156-2
Depending on the ordering version the 7SA6 relay up to four analog outputs are avail-
able. During the configuration of the functional scope (see Figure 5.1) it was deter-
mined which values may be transmitted via these interfaces. Up to four outputs can
be selected out of the following list:
• Measured value I
(current of phase L2) in per cent of the operational nominal
L2
current
• Measured value U
L2–L3
tional nominal voltage
• Measured value |P| (value of active power) in per cent of the operational nominal
power √ 3·U
·I
N
N
• Measured value |Q| (value of reactive power) in per cent of the operational nominal
apparent power √ 3·U
• Fault distance d in per cent of line length on the basis of the configured reactance
per unit length and the line length (Address 1110 to 1113 , see also Subsection
6.1.3)
• Fault distance d in kilometres or miles, depending on the configured length unit (Ad-
dress 236 , see also Subsection 6.1.1), on the basis of the configured reactance per
unit length (Address 1110 or 1112 , see also Subsection 6.1.3)
• Fault current I
, i. e. the maximum of 3 phase currents during clearance of the
max
last fault, primary in Ampere, on the basis of the configured primary and secondary
nominal current (Address 205 and 206 , see also Subsection 6.1.1)
The operational nominal values are the nominal values configured according to Ad-
dress 1103 and 1104 (see also Subsection 6.1.3).
The analog values are output as current source. The nominal range of the analog out-
puts is 0 mA to 20 mA, the operating range may reach up to 22.5 mA. The conversion
factor and the valid range can be set.
Once the measured values are selected (Section 5.1, Addresses 150 to 153 ), set the
conversion factor and the valid range for the available outputs, as follows:
for analog output 1 at mounting location "B" (Port B1):
Address 5001 20 mA (B1) = value in % to be indicated at 20 mA
Address 5006 MIN VALUE (B1) the minimum value permitted
for analog output 2 at mounting location "B" (Port B2):
Address 5011 20 mA (B2) = value in % to be indicated at 20 mA
Address 5016 MIN VALUE (B2) the minimum value permitted
(phase-to-phase voltage L2-L3) in per cent of the opera-
·I
N
N
Functions
6-269
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