Loss Of Phase 37; Identification; Function Block; Functionality - ABB 615 series Technical Manual

1MAC059074-MB A
4.1.8
4.1.8.1
4.1.8.2
4.1.8.3
4.1.8.4
615 series ANSI
Technical Manual

Loss of phase 37

Identification

Function description
Loss of phase

Function block

37
I_A TRIP
I_B TRIP_A
I_C TRIP_B
BLOCK TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C
GUID-C6685AEC-7D6B-4B3E-B162-8D316BCC9B2D V1 EN
Figure 139: Function block

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.

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.
IEC 61850 IEC 60617
identification identification
PHPTUC 3I<
Section 4
Protection functions
ANSI/IEEE C37.2
device number
37
293