Siemens siprotec 7SJ63, Инструкция по эксплуатации

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Functions
6-154
7SJ63 Manual
C53000-G1140-C120-1
6.17.4 Programming Settings for Fuse-Failure-Monitor
The Fuse–Failure–Monitor must be turned
2))
in these applications.
6.17.4.1 Settings for Fuse-Failure-Monitor
6.17.4.2 Information
6.17.5 Description of Trip Circuit Monitor (74TC)
The 7SJ63 is equipped with an integrated trip circuit monitor. Depending on the num-
ber of available binary inputs, monitoring with one or two binary inputs can be select-
ed. If the configuration of the binary inputs needed for this does not match the selected
monitoring type, then a message to this effect is sent. When using two binary inputs,
malfunctions in the trip circuit can be detected under all circuit breaker conditions.
When only one binary input is used, malfunctions in the circuit breaker itself cannot be
detected.
Monitoring with
Two Binary Inputs When using two binary inputs, these are connected according to Figure 6-64, parallel
to the associated trip contact on one side, and parallel to the circuit breaker auxiliary
contacts on the other.
Note:
The settings for the fuse failure monitor (address
)86()$,/9R
) are to be
selected so that reliable activation occurs if a phase voltage fails, but not such that
false activation occurs during ground faults in a grounded network. The value entered
at address
should be based on the settings entered in
36<67(0'$7$
re-
garding the voltage transformer connections. Address
)86()$,/5(6,'
must be set below the smallest anticipated ground fault current. Fuse failure monitor-
ing can be turned off completely at address
)86()$,/021
.
Note:
For ungrounded systems or systems which generate small amounts of ground fault
current, fuse failure monitoring must not be used!
Addr. LCD-Text Setting Options Default Setting Comments
5301 FUSE FAIL MON. ON
OFF OFF Fuse-Failure-Monitor
5302 FUSE FAIL 3Vo 10
~
100 V 30 V FFM pickup voltage 3V
0
5303 FUSE FAIL RESID 0.50
~
5.00 A 0.50 A FFM pickup current 3I
0
(supervision)
F# LCD-Text Comments
6575 VT Fuse Failure Voltage Transformer Fuse Failure
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