Siemens siprotec SJ62 User Manual page 91

2 Functions
89
rent elements or high-set elements the delay may be bypassed via a Manual Close
pulse, thus resulting in high-speed tripping.
Furthermore, immediate tripping may be initiated in conjunction with the automatic re-
closure function (cycle-dependent).
Pickup stabilization for the 67/67N elements of the directional time overcurrent protec-
tion can be accomplished by means of settable dropout times. This protection comes
into use in systems where intermittent faults occur. Combined with electromechanical
relays, it allows different dropout responses to be adjusted and a time grading of digital
and electromechanical relays to be implemented.
Pickup and delay settings may be quickly adjusted to system requirements via
dynamic setting swapping (see Section 2.4).
Utilizing the inrush restraint feature tripping may be blocked by the 67-1, 67-TOC,
67N-1, and 67N-TOC elements in phases and ground path when inrush current is de-
tected.
The following table gives an overview of the interconnection to other functions of
7SJ62/63/64.
Table 2-5 Interconnection to other functions
Directional Time Connection to Auto-
Overcurrent Pro- matic Reclosing
tection Elements
67-1
67-2
67-TOC
67N-1
67N-2
67N-TOC
Manual
CLOSE
• •
• •
• •
• •
• •
• •
Dynamic Cold Inrush Restraint
Load Pickup
•
•
•
•
•
•
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
•
•
•
•