ABB RELION 620 Series Technical Manual page 656

Section 4
Protection functions
4.5.4
4.5.4.1
4.5.4.2
4.5.4.3
4.5.4.4
650
Single-phase undervoltage protection PHAPTUV
Identification
Function description
Single-phase undervoltage protection,
secondary side
Function block
GUID-D3827813-F922-45E5-9BCA-161B5006F543 V1 EN
Figure 330: Function block
Functionality
The single-phase undervoltage protection function PHAPTUV is used to disconnect
damaged devices from the network. These can be, for example, electric motors which
are damaged when subjected to service under low voltage conditions.
The function contains a blocking functionality. It is possible to block function outputs,
timers or the function itself, if desired.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of PHAPTUV can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
GUID-E7B57F00-F9AF-467A-9C48-5AC47ECA22CA V1 EN
Figure 331: Functional module diagram
IEC 61850 IEC 60617
identification identification
PHAPTUV U_A<
1MRS757644 F
ANSI/IEEE C37.2
device number
27_A
620 series
Technical Manual