Siemens SIPROTEC 7SS525 V3.3 User Manual

End Fault Protection
139
7SS52 V4 Manual
C53000-G1176-C182-3
5.4.3 Setting Notes
T-CB open The parameter T-CB open (XX26/CU) is used to delay processing of the circuit
breaker OPEN status for special treatment of the coupler currents and for the end fault
protection.
End Fault Prot If the bay is configured as a feeder, the parameter End Fault Prot (XX29/CU) is
used to activate and deactivate the end fault protection. For coupler bays the setting
of this parameter is not relevant.
5.4.4 Settings for the Central Unit
5.4.5 List of Information from the Central Unit
5.4.6 List of Information from the Bay Unit
Addr. Setting Title Setting Options Default Setting Comments
118 I> BF 0.10 .. 2.00 I / In 0.50 I / In Current threshold for BF
119 I> BF-EF 0.05 .. 2.00 I / In 0.25 I / In Current threshold for BF - EF
120 T-BF-1P 0.05 .. 10.00 s 0.25 s Time delay for BF with 1-pole fault
121 T-BF-mP 0.05 .. 10.00 s 0.25 s Time delay for BF with multi-pole
faults
125 T-TRIP repeat 0.00 .. 10.00 s 0.12 s Time delay for TRIP repeat
126 T-CB open 0.00 .. 10.00 s 0.00 s Time delay for CB open
129 End Fault Prot ON
OFF
OFF End fault protection
FNo. Alarm Comments
10477 CZ release Check zone released
10478 >EF charact. >Earth fault characteristic active
FNo. Alarm Comments
7617 >CB OFF >Circuit breaker open
7618 >CB man.close >Circuit breaker manual close
7623 >CB ON >Circuit breaker closed
7644 End-Flt. Trip End fault protection: Trip phase L123
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Siemens SIPROTEC 7SS525 V3.3 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SS525 V3.3
Category	Power distribution unit
Language	English