Siemens SIPROTEC 4 User Manual

•
Overcurrent element with definite time or inverse time delay
•
For inverse time overcurrent protection, characteristics according to IEC or ANSI standards, one userde-
fined and two logarithmic inverse current/time characteristics are available
•
Direction determination with zero sequence quantities(Ι
0
, V
0
), wattmetric ground fault direction determi-
nation
•
Any element can be set as directional or non-directional — forward sensing directional, or reverse
sensing directional
•
Directional characteristic curve adjustable
•
Optionally applicable as additional ground fault protection.
Intermittent Ground Fault Protection
•
Detects and accumulates intermittent ground faults
•
Tripping after configurable total time.
Directional intermittent ground fault protection
•
Detects intermittent ground faults
•
Direction determination
•
Tripping after settable number of intermittent re-ignitions
Automatic Reclosing 79
•
Single-shot or multi-shot
•
With separate dead times for the first and all succeeding shots
•
Protective elements that initiate automatic reclosing are selectable. The choices can be different for
phase faults and ground faults
•
Separate programs for phase and ground faults
•
Interaction to time overcurrent protection element and ground fault elements. They can be blocked in
dependence of the reclosing cycle or released instantaneously
•
Synchronous reconnection is possible (only for 7SJ623, 7SJ624, 7SJ625, 7SJ626 und 7SJ64) in combina-
tion with the integrated synchronization function..
Fault Location
•
Initiation by trip command, external command or dropout of pickup
•
Calculation of the fault distance and output of the fault location in ohms (primary and secondary) and in
kilometers or miles
•
Up to three line sections can be configured.
Breaker Failure Protection 50 BF
•
By checking the current and/or evaluating the circuit breaker auxiliary contacts
•
Started by any integrated protection function that trips
•
Initiation possible via a binary input from an external protective device.
Flexible Protective Functions
•
Up to 20 customizable protection functions with three-phase or single-phase operation
•
Any calculated or directly measured quantity can be evaluated on principle
•
Standard protection logic with definite time characteristic
Introduction
1.3 Characteristics
28 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016

Siemens SIPROTEC 4 Specifications

General

Brand	Siemens
Model	SIPROTEC 4
Category	Protection Device
Language	English