Operating Under Permanent Fault Conditions With Trip Three Count Setting Recloser - ABB wiAutoLink Instruction Manual

Wireless electronic sectionalizer; 15kv, 27kv and 38 kv

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Table Of Contents

Table of Contents

1YSA160045-EN - Rev. 5

3. If the upstream recloser or breaker closes and further fault detected, could be considered a

permanent fault condition and wiAutoLink process an Fault condition again waiting an opening

of the upstream recloser or breaker.

4. If the upstream recloser or breaker open again and the occurrence of zero current, the

sectionalizer registers the last count and wiAutoLink opening procedure are performed as

indicated below:

a. So far, show information

b. Opening operation

c. After Opening operation

Below, in figure 4 diagram.

The times shown in Diagrams B and C as T1 correspond to the time the recloser takes to reconnect the

circuit. This "dead time" is usually adjustable up to 3 minutes. The wiAutoLink can operate while

keeping the count performed with the current at zero for up to 3.5 minutes, above any possible dead line

value configured in the recloser.

Due to the latest technological improvements recently introduced to reclosers, the time indicated as T2

is the time the recloser takes to open after the fault detected. The wiAutoLink, by means of the spectral

analysis in the second harmonic, only needs one cycle to identify a current as a fault current, isolating it

from symmetric and asymmetric inrush currents. This feature adds an outstanding technical advantage

to the wiAutoLink.

D.2.2.2.