7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 80 of 82
© 2013 Siemens Protection Devices Limited
Section 4: Control & Logic Functions
4.1
Autoreclose (79)
Autoreclose sequences can be specified differently for Phase. Earth, Externally Initiated and SEF faults.
Sequences should be simulated for each applicable different fault type with the actual relay settings required for
service installed in the relay.
The relay requires that the correct indications are received at the CB auxiliary contact inputs and that the injected
current and voltage used to generate protection operations are timed to the autoreclose sequence to provide a
realistic simulation of the actual system conditions.
The Instruments Menu contains Autoreclose Meters for the Autoreclose State and the Shot No. which are useful
during sequence testing.
The time stamped Events listing can be downloaded from the relay to a pc to allow diagnosis of the sequence
including measurements of sequence Dead Times and other timing without the use of external measuring
equipment or complex connections.
4.2
Quick Logic
If this functionality is used, the logic equations may interfere with testing of other protection functions in the relay.
The function of the Quick Logic equations should be tested conjunctively with connected plant or by simulation to
assess suitability and check for correct operation on an individual basis with tests specifically devised to suit the
particular application.
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