1YSA160045-EN - Rev. 5
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Section D: Operation of the wiAutoLink
D.1.
General
The wiAutoLink Electronic Sectionalizer is a device that operates at a permanent fault in the distribution line. It must be used
together with an upstream recloser or circuit breaker with reclosure capability. Please take note that the wiAutoLink is not a fuse tripping
device, therefore it cannot be used as a protection device by itself.
The main function of the wiAutoLink is to discriminate between permanent and transient faults in the distribution line, making it
possible for the upstream recloser or substation breaker to clear transient faults without permanent interruption to the customers.
The wiAutoLink is not a fuse tripping device, it will operate to isolate a permanent fault on no load condition. The wiAutoLink fits
into a standard fuse cutout and it directly replaces an existing fuse base. When it operates the wiAutoLink drops open like a fuse.
The wiAutoLink Electronic Sectionalizer is designed ONLY to sectionalize faulty lines
and NOT for saving people from accidents or electrocution when contacting energized
circuits.
D.2.
Operating Under Fault Conditions
D.2.1.
Operating Under Temporary Fault Conditions
In distribution overhead lines 80-90% of the faults are temporary, and are cleared by an upstream recloser or breaker.
Figure 37.
1.
The wiAutoLink is in monitor mode under normal load conditions.
wiAutoLink register:
a.
“Device returned to normal condition”
if last overhead has been solved without trip
b.
“
The device has been normally powered up
”
if is the first time that wiAutoLink has powered.
2.
When a fault is present
The wiAutoLink senses a current above a programmed pickup threshold (Ia wiAutoLink) and
becomes active.
