Loss Of Phase 37; Identification; Function Block; Functionality - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
4.1.13
4.1.13.1
4.1.13.2
4.1.13.3
4.1.13.4
620 series ANSI
Technical Manual

Loss of phase 37

Identification

Function description
Phase undercurrent protection

Function block

GUID-ED7916D7-8083-4660-B274-252DA7DCB833-ANSI V1 EN
Figure 120: Function block

Functionality

The phase undercurrent protection 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 the phase undercurrent protection 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
PHPTUC1 3I<
Section 4
Protection functions
ANSI/IEEE C37.2
device number
37
263