1MRS 750942-MUM
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
REU 523
23
SGF1...SGF4
Switchgroups SGF1...SGF4 are used for configuring the desired function as follows:
Table 4.1.4.6-2 SGF1
Switch Function
Default
setting
SGF1/1 Selection of the latching feature for power output PO1 0
SGF1/2 Selection of the latching feature for power output PO2 0
• When the switch is in position 0 and the measuring signal which
caused the trip falls below the set start value, the output contact
will return to its initial state.
• When the switch is in position 1, the output contact will remain
active although the measuring signal which caused the trip falls
below the set start value.
A latched output contact can be unlatched either via the HMI, the
external binary input or the serial bus.
SGF1/3 Minimum pulse length for signal outputs SO1 and SO2
• 0=80 ms
• 1=40 ms
0
SGF1/4 Minimum pulse length for power outputs PO1 and PO2
• 0=80 ms
• 1=40 ms
Note!
The latching function of PO1 and PO2 will overrun this function.
0
SGF1/5 CBFP
• When the switch is in position 0, the CBFP is not in use.
• When the switch is in position 1, the signal to output PO1 will
start a timer which will generate a delayed signal to output PO2,
provided that the fault is not cleared before the CBFP operate
time has elapsed.
0
SGF1/6 Not in use 0
SGF1/7 Not in use 0
SGF1/8 Not in use 0
Σ SGF1 0
Table 4.1.4.6-3 SGF2
Switch Function
Default
setting
SGF2/1 Single or three-phase use
• 0 = three-phase use
• 1 = single-phase use
In single-phase use, the measured voltage has to be connected to
inputs X1.1/1 and X1.1/3 for proper functioning and the set start
value of stage U<< set 0.1 x U
n
below the set start value of stage
U<.
0
SGF2/2 Selection of conventional undervoltage measurement or
positive-phase-sequence protection for stage U<<
• 0 = conventional undervoltage measurement in use
• 1 = positive-phase-sequence U
1s
in use
0
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