Programming Time-Overcurrent Settings; Programming Settings For Time-Overcurrent Phase Protection - Siemens SIPROTEC 7SJ62 Instruction Manual
Multi-functional protective relay with bay controller
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- Manual (72 pages)
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Functions
6.2.2
Programming Time-Overcurrent Settings
6.2.2.1
Programming Settings for Time-Overcurrent Phase Protection
General
50-2 Relay Element
6-26
Normal Load Flow
50-1
T
50-1
TRIP
T
50-1
Fault Location B: Source-side Trip Time = T
Fault Location A: Load-side Trip Time = t
Figure 6-14
Reverse Interlocking Protection Scheme
The functions associated with time-overcurrent protection were established during
configuration of protective functions (Section 5.1) at address &KDUDF 3KDVH.
If address was set to 'HILQLWH 7LPH RQO\, then only the settings for the def-
inite-time elements are available.
At address )&7 , phase time-overcurrent protection may be switched 21
or 2)).
The pickup and delay of the 50-2 relay element are set at addresses
3,&.83 and '(/$< respectively. The 50-2 relay element is typically uti-
lized for protection against high magnitude faults. For this reason, the relay element
pickup is often set high while the delay is set short. It is always important to set the
B
52
50-2
´$!Ã7y‚px´
T
50-2
TRIP
T
50-2
50-2
1
Source-side Backup Trip Time = T
A
52
52
50-1
50-1
t
t
1
1
TRIP
TRIP
t
1
= Source side 50-2 Delay
=Source-side 50-1 Delay
50-1
7SJ62 Manual
C53000-G1140-C121-1
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