CYG PRS-7367 User Manual

Protection Functions
PRS-7367 81
I3P
OCTN_46N
Blk
Blk_Str
Blk_Op
Str
Ena_Mult
Op
Figure 3.10-1 Function block
3.10.1.2 Signals
Table 3.10-1 Input Signals
Signal
Description
I3P
The current magnitude in all the three phases
Blk
This signal blocks all the binary output signals of the function
Blk_Str
This signal blocks all the start outputs of the function
Blk_Op
This signal blocks all the trip signals of the function.
Ena_Mult
This signal enables the current multiplier.
Table 3.10-2 Output Signals
Signal
Description
Str
This is the integrated start signal
Op
This is the integrated operation signal.
3.10.2 46N Protection Principle
The negative sequence current protection function can be enabled or disabled by setting the
corresponding 46N_Ena parameter values as "1" or "0".
The operation of the negative sequence current protection can be described using a module
diagram. All the modules in the diagram are explained in the next sections.
 Initiation element
The measured negative-sequence current is compared to the set 46N_Cur_Str value. If the
measured value exceeds the set 46N_Cur_Str, the level detector activates the timer module.
If the 46N_Ena_Mult input is active, the set 46N_Cur_Str, is multiplied by the set
46N_Mult_Cur_Str.

CYG PRS-7367 Specifications

General

Brand	CYG
Model	PRS-7367
Category	Control Unit
Language	English