Table 171: PHHPTOC Technical revision history
Technical revision Change
C
Measurement mode
"P-to-P + backup" replaced
with "Peak-to-Peak"
D Step value changed from 0.05 to 0.01 for the
Time multiplier
setting.
Table 172: PHLPTOC Technical revision history
Technical revision Change
B Minimum and default values changed to 40 ms
for the
Operate delay time
setting
C Step value changed from 0.05 to 0.01 for the
Time multiplier
setting.
4.1.2 Three-phase non-directional overcurrent protection
PH3xPTOC
4.1.2.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase non-directional
overcurrent protection - Low stage
PH3LPTOC 3I> 51P-1
Three-phase non-directional
overcurrent protection - High stage
PH3HPTOC 3I>> 51P-2
Three-phase non-directional
overcurrent protection - Instantaneous
stage
PH3IPTOC 3I>>> 50P/51P
4.1.2.2 Function block
GUID-684F722A-B4AC-4326-AE35-B5B3A8D3ACC1-CN V1 EN
Figure 76: Function block
4.1.2.3 Functionality
The three-phase overcurrent protection PH3xPTOC is used as one-phase, two-
phase or three-phase non-directional overcurrent and short circuit protection for
feeders.
1YHT530004D05 D Section 4
Protection functions
615 series 157
Technical Manual
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