ABB 615 Series - Section 4 Protection Functions; Three-Phase Current Protection; Function Block; Functionality

Section 4 Protection functions
4.1 Three-phase current protection
4.1.1 Three-phase non-directional overcurrent protection 51P, 50P,
50P-3
4.1.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase non-directional
overcurrent protection, low stage
PHLPTOC 3I> 51P
Three-phase non-directional
overcurrent protection, high stage
PHHPTOC 3I>> 50P
Three-phase non-directional
overcurrent protection, instantaneous
stage
PHIPTOC
3I>>> 50P-3
4.1.1.2 Function block
TRIP
PICKUPI_B
51P
I_C
I_A
BLOCK
ENA_MULT
TRIP
PICKUPI_B
50P
I_C
I_A
BLOCK
ENA_MULT
TRIP
PICKUPI_B
50P-3
I_C
I_A
BLOCK
ENA_MULT
GUID-5CFFB25F-7DB5-4683-B405-03CE02826062 V1 EN
Figure 104: Function block
4.1.1.3 Functionality
The three-phase non-directional overcurrent protection function 51P, 50P, 50P-3 is used
as one-phase, two-phase or three-phase non-directional overcurrent and short-circuit
protection.
The function picks up when the current exceeds the set limit. The trip time characteristics
for low stage 51P and high stage 50P can be selected to be either definite time (DT) or
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 211
Technical Manual