ABB 615 Series - Function Block; Functionality; Identification; Loss of Phase 37

4.1.8 Loss of phase 37
4.1.8.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Loss of phase PHPTUC 3I< 37
4.1.8.2 Function block
TRIP
TRIP_A
I_A
37
I_B
I_C
BLOCK
TRIP_B
TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C
GUID-C6685AEC-7D6B-4B3E-B162-8D316BCC9B2D V1 EN
Figure 139: Function block
4.1.8.3 Functionality
The loss of phase function 37 is used to detect an undercurrent that is considered as a fault
condition.
37 picks up when the current is less than the set limit. Operation time characteristics are
according to definite time (DT).
The function contains a blocking functionality. It is possible to block function outputs and
reset the definite timer if desired.
4.1.8.4 Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are “Enable” and “Disable”.
The operation of 37 can be described with a module diagram. All the modules in the
diagram are explained in the next sections.
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 293
Technical Manual