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Functions
6.17.4 Programming Settings for Fuse-Failure-Monitor
must be set below the smallest anticipated ground fault current. Fuse failure monitor-
ing can be turned off completely at address )86( )$,/ 021.
6.17.4.1 Settings for Fuse-Failure-Monitor
Addr.
LCD-Text
5301
FUSE FAIL MON.
5302
FUSE FAIL 3Vo
5303
FUSE FAIL RESID
6.17.4.2 Information
F#
LCD-Text
6575
VT Fuse Failure
6.17.5 Description of Trip Circuit Monitor (74TC)
Monitoring with
Two Binary Inputs
6-154
Note:
The settings for the fuse failure monitor (address )86( )$,/ 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,'
Note:
For ungrounded systems or systems which generate small amounts of ground fault
current, fuse failure monitoring must not be used!
The Fuse–Failure–Monitor must be turned 2)) in these applications.
Setting Options
ON
OFF
~
10
100 V
~
0.50
5.00 A
Voltage Transformer Fuse Failure
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.
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.
Default Setting
OFF
Fuse-Failure-Monitor
30 V
FFM pickup voltage 3V
0.50 A
FFM pickup current 3I
Comments
Comments
0
(supervision)
0
7SJ63 Manual
C53000-G1140-C120-1
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