7.1.8
Technical data
Table 76:
PHPIOC (50) technical data
Function
Range or value
Accuracy
Operate current
(5-2500)% of lBase
±
1.0% of I
n
at I
£
I
n
±
1.0% of I at I > I
n
Reset ratio
> 95%
-
Operate time
20 ms typically at 0 to 2 x I
set
-
Reset time
30 ms typically at 2 to 0 x I
set
-
Critical impulse time
10 ms typically at 0 to 2 x I
set
-
Operate time
10 ms typically at 0 to 5 x I
set
-
Reset time
40 ms typically at 5 to 0 x I
set
-
Critical impulse time
2 ms typically at 0 to 5 x I
set
-
Dynamic overreach
< 5% at
t
= 100 ms
-
7.2
Instantaneous phase overcurrent protection phase
segregated output SPTPIOC (50)
7.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Instantaneous phase overcurrent
protection, phase segregated output
SPTPIOC
3I>>
SYMBOL-Z V1 EN
50
7.2.2
Functionality
The instantaneous phase overcurrent function for single pole tripping has a low transient
overreach and short tripping time to allow use as a high set short-circuit protection
function and where the requirement for tripping is one- and/or three-phase.
1MRK 506 335-UUS A
Section 7
Current protection
191
Technical manual
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