Mode 3A (4 Independent Commands, 4Ic) - Siemens SWT 3000 Equipment Manual

Activated Input
BI1 and/or
BI2 and/or
BI3 and/or
BI4
-
USYNC
1) If an invalid frequency or code is received, or in case of guard tone alarm: If t
unblocking impulse (t
the RXALR output of the ALR board.
2) If more than one input is active, command transmission is alternating. The priority control dictates the
sequence in which the command frequencies are transmitted. Setting the output extension to ≥ 100 ms on
the receive side prevents the output relays releasing during alternating command transmission.
3) If an invalid frequency or code is received or in case of guard tone alarm.
2.7.3.5

Mode 3a (4 Independent Commands, 4iC)

NOTE
i
i
This mode is always transmitted in the coded tripping function.
Table 2-7
Activated Input
All off
BI1
BI2
BI3
BI4
BI1 + BI2
BI1 + BI3
BI1 + BI4
BI2 + BI3
BI2 + BI4
BI3 + BI4
BI1 + BI2 + BI3
BI1 + BI2 + BI4
BI1 + BI3 + BI4
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020
Transmission
Uncoded
f and/or
1
f and/or
2
f and/or
3
f alternating
4
-
fs
= Duration of the unblocking impulse). The unblocking impulse is distributed via
unbl.
Logic Scheme for the Mode 3a
Transmis- Transmission Coded
sion
Uncoded
- fg
- f + f
s 4
- f + f
1 4
- f + f
2 4
- f + f
3 4
- f + f
s 5
- f + f
2 5
- f + f
s 6
- f + f
1 5
- f + f
3 5
- f + f
2 6
- f + f
1 6
- f + f
3 6
- f + f
s 7
Transmission Command Output
Coded in the Remote
Station without
unblocking
- CO1 and/or
CO2 and/or
CO3 and/or
CO4 alternating
-
Alarm signaling
- -
Command Output in
the Remote Station
without Unblocking
-
CO1
CO2
CO3
CO4
CO1 + CO2
CO1 + CO3
CO1 + CO4
CO2 + CO3
CO2 + CO4
CO3 + CO4
CO1 + CO2 + CO3
CO1 + CO2 + CO4
CO1 + CO3 + CO4
Functional Description
2.7 Protection Modes
Command Output
in the Remote
Station with
Unblocking
T > 0 1)
unbl.
CO1 and/or
CO2 and/or
CO3 and/or
2) CO4 alternating 2)
3) Alarm signaling 1)
unblocking impulse
at RXALR
-
> 0, output of the
unbl.
Command Output in
1) the Remote Station
with Unblocking 2)
T > 0
unbl.
-
CO1
CO2
CO3
CO4
CO1 + CO2
CO1 + CO3
CO1 + CO4
CO2 + CO3
CO2 + CO4
CO3 + CO4
CO1 + CO2 + CO3
CO1 + CO2 + CO4
CO1 + CO3 + CO4
+
1)
53