Siemens SIPROTEC 7SJ62 Instruction Manual

Functions
6-497SJ62 Manual
C53000-G1140-C121-1
a fault in the reverse direction, the directional overcurrent element that detects faults
in the reverse direction will block the high-speed operation of the non-directional over-
current element at the opposite end of the line. The relay at the opposite end of the
line is generally located at a different substation, thus blocking is accomplished via the
pilot wires. In addition, a message is generated regarding the fault direction and trans-
mitted to the relay located at the opposite end of the line.
Figure 6-25 Reverse Interlocking Using Directional Elements
Figure 6-26 Logic Diagram for Generation of Fault Direction Signals
The directional overcurrent elements can be coordinated with each other to provide
time delayed backup protection for the reverse interlocking scheme.
6.3.2 Programming Directional Overcurrent Settings
6.3.2.1 Programming Settings For Directional Overcurrent Phase Protection
General In contrast to the main functions of non-directional phase and ground overcurrent pro-
tection, all other protective functions are disabled upon device delivery. The accom-
7
SJ6*
7
SJ6*
7
SJ6*
50-1
7
SJ6*
7
SJ6*
7
SJ6*
7
SJ6*
7
SJ6*
− Blocking
− Non-directional Ele-
ment
− Directional Element
52 52 52 52 52 52
G
G
52
52
50-1
50-1
50-1
50-1
50-1
50-1
50-1
50-1
Pickup of 50-1 A φ
RVS 50-1 A Forw.
RVS 50-1 A Rev.
Direction deter-
mination Phase A
forwards
reverse
Pickup of 50N-1
Direction deter-
mination Ground
RVS 50N-1 N Forw.
forwards
RVS 50N-1 N Rev.
reverse
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Siemens SIPROTEC 7SJ62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SJ62
Category	Relays
Language	English