Section 8
Current protection
8.1
Instantaneous phase overcurrent protection 3-phase
output PHPIOC
8.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Instantaneous phase overcurrent
protection 3-phase output
PHPIOC
3I>>
SYMBOL-Z V1 EN
50
8.1.2
Functionality
The instantaneous three phase overcurrent function has a low transient overreach and
short tripping time to allow use as a high set short-circuit protection function.
8.1.3
Function block
PHPIOC
I3P*
BLOCK
TRIP
IEC08000001 V1 EN
Figure 62:
PHPIOC function block
8.1.4
Signals
Table 66:
PHPIOC Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Three phase group signal for current inputs
BLOCK
BOOLEAN
0
Block of function
Table 67:
PHPIOC Output signals
Name
Type
Description
TRIP
BOOLEAN
General trip signal
1MRK 504 135-UEN A
Section 8
Current protection
141
Technical manual
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