SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 29
Explanation:
The PU3f checks the state of input signals BI1...4 from the protection device for
plausibility. Only
1 of the signal inputs BI1...3 may be active. If more than 1 of the signal inputs BI1...3 is active and
BI4 is inactive that is an
input error (prohibited input combination).
BI4 has priority and is treated independently of the states of BI1...3; i.e. if BI4 is active the state
of BI1...3 is not significant (if BI4 is active the frequency tx_f4 is transmitted regardless of the state
of BI1...3).
The guard tone (fg) is transmitted in the case of an
input error and an entry is generated in the
event memory with specification of the “prohibited input combination“.
The Unblocking function can be activated for Mode4 in the same way as with the other operating
modes.
Mode 5A “3 commands independent”
For this mode is no coded tripping available!
3 signal inputs are available for the operating mode “3 commands independent". 9 frequencies
are needed for transmitting “3-commands independent“ via the analog line interface LIA.
At the transmit end every possible combination of signal inputs BI1...3 is permanently assigned
to a protection frequency.
At the receive end every protection frequency can be assigned to one or more signal outputs
(CO1...4).
Table 20: Logic scheme for the Mode 5A (3iC three independent commands)
activated
Input
Transm.
uncoded
Command output in the remote station
tunbl>0
1)
all off fg ---
BI1 f1 CO1
BI2 f2 CO2
BI3 f3 CO3
BI1+BI2 f4 CO1+CO2
BI1+BI3 f5 CO1+CO3
BI2+BI3 f6 CO2+CO3
BI1+BI2+BI3 f7 CO1+CO2+CO3
USYNC fs ---
- - Alarm signaling +Unblocking pulse at EALR
1) If an invalid frequency or code is received, resp. in case of guard tone alarm: If tunbl>0 output of the unblocking pulse
(tunbl. = Duration of the unblocking pulse). The unblocking pulse is distributed via the EALR output of the PU3f.
Table 21: Possible output jumper settings in Mode 5A
Receive frequency CO1 CO2 CO3 CO4 Explanation
fg X/1 X/1 X/1
X/1
Guard tone signaling
f1
X/1
X/1 X/1 X/1 BI1 active
f2 X/1
X/1
X/1 X/1 BI2 active
f3 X/1 X/1
X/1
X/1 BI3 active
f4
X/1 X/1
X/1 X/1 BI1+BI2 active
f5
X/1
X/1
X/1
X/1 BI1+BI3 active
f6 X/1
X/1 X/1
X/1 BI2+BI3 active
f7
X/1 X/1 X/1
X/1 BI1+BI2+BI3 active
Note: The default program settings are highlighted in bold type
Possible settings:
X = no reaction: The state of the signal output is not affected.
1 = switch on: The signal output is switched on or “retriggered“.
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