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SIF5600 - Manual - 03 - 2008
and remote commands are disabled (52 local Off, 52 remote Off).the output relay opening and closing
command minimum duration (ttr1...4), which may be set within the range 0.01….1.00 s, must be set
on the basis of the characteristics of the breaker being controlled.
the breaker closure command (by means of the front panel button or controlled remotely via the se-
rial port) is only enabled when the protective device is in the resting state with the trip indicator LeDs
(50-51 and 50N-501N) off; in the case of the prior tripping of a protective function, it is necessary to
reset the trip indication (reSet).
Manual opening and closing commands are only considered valid if they have a duration exceeding
a preset value (tVAL) of 200 ms.
Output opening and closing commands are mutually exclusive, in the case of the simultaneous op-
eration of the buttons, priority is given to the open command.
By means of the Modbus command over the rS485, thySetter or locally (MMI) it is possible to:
- enable/disable the breaker open/close buttons,
- enable/disable diagnostic monitoring of the breaker status; when diagnostic monitoring is disabled
(52 check Off) the flashing of the LeDs is deactivated along with the alarm commands on the relay
possibly programmed for breaker diagnostics (Self test 52)
Selection of the breaker closure function on a output relay excludes the possibility of programming
any other functions on the same relay.
the breaker diagnostic monitoring function (Self test 52) may be configured in association with the
general self-test function with the same method.
remote control of the breaker may also be activated by Modbus on the rS485 and thySetter; issuing
the opening and closing commands is enabled (if 52 remote On) regardless of the position of the key
switch.
CAUTION
The breaker open and/or close commands must be executed by qualified personnel in compliance
with the safety requirements; failure to observe the safety rules may have dangerous consequences
for the system and people..
CAUTION
The breaker open and/or close commands must be executed by qualified personnel in compliance
with the safety requirements; failure to observe the safety rules may have dangerous consequences
for the system and people..
tTR
tTR
tTR
tTR
CLOSE CB
BUTTON
OPEN CB
BUTTON
CLOSE
COMMAND
OPEN
COMMAND
LOGIC STATE DIAGRAM CONCERNING CIRCUIT BREAKER MANAGEMENT COMMANDS
tval
tval
tval
tval
tval
tval
tval
t
KEYLOCK
SWITCH
OFF/
DISPLAY MODE
CB MODE
CB1_en.ai