Application and Setting Notes
Parameter:
Binary Output Config > Hand Reset Outputs
•
Default Setting:
<None>
Unless programmed as above the output relays are self reset by default. These outputs will reset after
removal of the operate condition or elapse of the
Binary Output Config > Min. Operate Time
setting, whichever is the longer.
When set to
Hand reset
the output remains in the operate state until reset by:
–
pressing the ▶ button for 3 seconds, or
–
energizing a suitably programmed binary input, or
–
an appropriate command over the data communications channel(s).
On loss of the auxiliary supply hand-reset outputs will reset. When the auxiliary supply is re-established
the binary output will remain in the reset state unless the initiating condition is still present.
!
WARNING
Self Reset Outputs.
²
Any/all binary output relays can be used to operate the trip coils of the circuit‑breaker directly where
the trip coil current does not exceed the
make and carry
contact rating. Typically circuit‑breaker
auxiliary contacts or other auxiliary devices must be used to interrupt the trip coil current.
²
With a failed breaker condition the relay may remain operated until current flow is interrupted by an
up-stream device. The relay will then reset and attempt to interrupt trip coil current flowing through
an output contact. Where this level is above the break rating of the output contact an auxiliary relay
with heavy-duty contacts should be utilized in the primary system
Parameter:
Binary Output Config > Min Operate Time
•
Default Setting:
0.1 s
This time is initiated from the pickup of a
self reset
or
pulsed
output contact.
Parameter:
Binary Output Config > Pickup Outputs
•
Default Setting:
<None>
When assigned as a
Pickup
an output relay will operate for both the pickup and operate condition of the
assigned function element(s). The pickup output of function elements is instantaneous i.e. without the
time delay associated with the operate output.
Parameter:
Binary Output Config > Pulsed Outputs
•
Default Setting:
<None>
When operated, the output will reset after elapse of the
Min Operate Time
setting regardless of the
initiating condition.
As an example this feature can be used when a binary output is operated by a device counter reaching its
target value. The operate condition (counter value) may be present for an indefinite period after opera-
tion of the output relay but continuous operation of the output relay is undesirable e.g. SCADA system
interface.
3.5.4
Device Functionality
3.5 Binary Outputs
Reyrolle 7SR5, Transformer Protection Device, Device Manual
81
C53000-G7040-C015-1, Edition 11.2019
