Toshiba GRZ100 B Series, Instruction Manual, Page: 59 / 447

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58
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6 F 2 S 0 8 4 6
Logic Level
Inversion
Trip
Guard
or Trip
BIn
BIm
(+)
(-)
R1-CH1
Logic Level
Inversion
R1-CH2
Signal
Receiving
Signaling Equipment
Signal
Sending
BO13
Logic Level
Inversion (*)
CS Trip
BO9
Logic Level
Inversion (*)
SBT
Test
BOn
Logic Level
Inversion (*)
S-DEF2
(or S-DEFBOP2)
Trip
(*): By PLC function.
Figure 2.4.3.10 Interface with Signaling Equipment
2.4.3.9 Signaling Channel
Table 2.4.3.1 shows the protection scheme and required signaling channel. "Simplex" here means
that a transmit signal is shared by all terminals. "Multiplex" means that a specific channel is used
for each terminal.
Table 2.4.3.1 Protection Scheme and Signaling Channel
Scheme
Simplex Multiplex
PUP × ×
POP ×
UOP × ×
BOP × ×
Since the PUP transmits a trip permission signal through operation of the underreaching element,
it is not necessary to distinguish a transmit signal from a receive signal and a simplex channel
suffices. Of course, a multiplex channel can also be applied.
Since the POP transmits a trip permission signal through operation of the overreaching element, it
is necessary to distinguish a transmit signal from a receive signal to prevent false operation in case
of a fault in the overreaching zone. Therefore, a multiplex channel is necessary.
Since the UOP and BOP transmit a trip block signal, a simplex channel suffices. A multiplex
channel can also be applied.
The signal received from the protection signaling equipment is generally a single one, while with
frequency shift signaling, two signals, a trip signal and a guard signal, are received. The GRZ100
is equipped with signal receive logic shown in Figure 2.4.3.11 to respond to either case. In the case
of a single signal, a signal from the signaling equipment is input to R1-CH1 and the scheme switch
[CHSEL] is set to "Single". In the case of two signals, a trip signal is input to R1-CH1, a guard
signal or an alternative trip signal is input to R1-CH2 and the [CHSEL] is set to "Guard". Signal
R1-CR selected by this scheme switch is used as a receive signal in command protection.
When two signals are utilized, the signal receive logic outputs signal R1-CR only when receiving
a trip signal only or no trip signal nor guard signal is received for more than 20 ms. However, the
output by the latter lasts only for 100 ms. When the latter continues for more than 100 ms, a
telecommunication circuits failure alarm signal R1-CF is output.