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SIF5600 - Manual - 03 - 2008
the following aspects may be programmed independently:
- enabling or disabling the simultaneous transmission of control impulses from block output circuits
Blout1 and Blout2;
- enabling or disabling the reception of control impulses by block input circuit Blin1;
- the
Pulse Blin1
control window, within which reception of the impulses by block input circuit Blin1
is controlled, may be adjusted to adopt the following values Off – 0.05 – 0.1 - 1 - 10 - 30 s;
- the
Pulse Blout
transmission impulse control window, within which a given number of impulses are
transmitted simultaneously to the block output circuits Blout1 and Blout2, which may be adjusted to
adopt values of Off-0.05-0.1-1-10-30 s and to which the periodic transmission of impulses correspond
every 0.015-0.03-0.3-3-9 s respectively (hence transmitting three impulses within the Blout Pulse win-
dow).
When the block input circuit Blin1 does not receive any impulses within the corresponding
Pulse
Blin1
regulated control window, upon expiry of the window itself it becomes recognized that the
pilot wire connected to the input circuit is broken, causing the change of state of one or more output
relays programmed to operate self-test function and/or indicate the continuity of the pilot wire in
relation to input Blin1. the pilot wire breakage message may be read on the display in the Self-test
sub-menu within the read menu; the self-test status summarizing message identifies the alarm type
as “Minor”, while the details of the cause (“PW break Blin1”) are shown by pressing the “
“ but-
ton. the same information is available on the Self-test page inside the thySetter software.
During programming, users must pay particular care so that the setting of the control window relat-
ing to the receiving relay coincides with the setting of the issue window relating to the corresponding
transmitting relay.
Furthermore, a single deactivating timer tF may be set for both output circuits Blout1 and Blout2 as a
backup in the event of a breaker failure while there is a fault on the system.
the timer tF starts counting with the start of the threshold associated with the output circuits Blout1
and Blout2 and in any case, the output circuits themselves are both maintained in the active state for
the entire duration of said count (logic state 1); upon expiry of the set time tF the output circuits are in
any case deactivated (logic state 0), allowing tripping of the relay upstream which then controls the
opening of the breaker as a backup.
Furthermore, upon expiry of the set time tF the relay indicates the breaker failure causing the switch-
ing of the status of one or more of the output relays programmed to operate the self-test function
and/or indicate the breaker failure (“cB fail”). the information is displayed by means of an explana-
tory message “cB fail”, which may be viewed on the display and through the thySetter software as
described previously (Self-test submenu inside the read menu).
the timer tF may be set within the range 0.00...10.00 s with a resolution of 0.01 s.
the user may program the activation or deactivation of the timer tF; when disabled, the block output
circuits Blout1 and Blout2 are active (logic state 1) if the threshold associated with these is started
(Start with logic state of 1) and they deactivate after a fixed backup delay of 300 ms counted from the
instant that start is reset.
As a backup function in the case of a pilot wire short circuit while there is a fault on the system, timer
tB may be set to a maximum activation time for block input circuit Blin1.
the timer tB starts from the moment input circuit Blin1 is active and upon expiry of set time tB the
protective device ignores the block state setting itself in the trip state, hence controlling the open-
ing of the breaker in order to isolate the fault. Upon expiry of the time tB the short circuit of the pilot
wire connected to the input circuit Blin1 is indicated, causing the switchover of the state of one or
more output relays programmed with the self-test function and/or indicating the short-circuiting of
the pilot wire (“PW shorted”). the information is displayed by means of an explanatory message
“PW shorted”, which may be viewed on the display and through the thySetter software (Self-test
submenu inside the read menu).
timer tB may be set within the range 0.10...10.00 s with a resolution of 0.01 s. the enabling or disabling
of the timer tB may be programmed by the user; when disabled, the protective device associated with
input circuit Blin1 is maintained in the blocked state only if the input itself is active (logic state 1).
Disabling the backup timers tF and tB is necessary in systems where the SIF5600 relay must only be
used for the indication and location of faults, without controlling the opening of any breakers.
Start
Trip
Block1
Blout2
CB fail
tF_en.ai
LOGIC STATE DIAGRAM CONCERNING THE BACKUP TIMER tF AGAINST CIRCUIT BREAKER FAILURE
t>>
t>>
t>>
t
tF
tF
tF
tF