6.1.8 Technical data
Table 29: 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
-
6.2 Four step phase overcurrent protection 3-phase output
OC4PTOC (51/67)
6.2.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Four step phase overcurrent protection
3-phase output
OC4PTOC
TOC-REVA V1 EN
51/67
6.2.2 Functionality
The four step phase overcurrent protection function, 3-phase output OC4PTOC (51/67)
has independent inverse time delay settings for step 1 and 4. Step 2 and 3 are always
definite time delayed.
All IEC and ANSI inverse time characteristics are available.
The directional function is voltage polarized with memory. The function can be set to be
directional or non-directional independently for each of the steps.
1MRK 511 287-UUS A Section 6
Current protection
85
Technical manual
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