Section 4 Protection Functions; Three-Phase Current Protection; Three-Phase Non-Directional Overcurrent Protection Phxptoc; Identification - ABB RELION 611 Series Technical Manual

1MRS757454 D
Section 4
4.1
4.1.1
4.1.1.1
4.1.1.2
4.1.1.3
611 series
Technical Manual
Protection functions

Three-phase current protection

Three-phase non-directional overcurrent protection
PHxPTOC

Identification

Function description
Three-phase non-directional
overcurrent protection, low stage
Three-phase non-directional
overcurrent protection, high stage
Three-phase non-directional
overcurrent protection, instantaneous
stage

Function block

A070553 V1 EN
Figure 37: Function block

Functionality

The three-phase non-directional overcurrent protection function PHxPTOC is used as
one-phase, two-phase or three-phase non-directional overcurrent and short-circuit
protection.
The function starts when the current exceeds the set limit. The operate time
characteristics for low stage PHLPTOC and high stage PHHPTOC can be selected to
be either definite time (DT) or inverse definite minimum time (IDMT). The
instantaneous stage PHIPTOC always operates with the DT characteristic.
Protection functions
IEC 61850 IEC 60617
identification identification
PHLPTOC 3I>
PHHPTOC 3I>>
PHIPTOC 3I>>>
Section 4
ANSI/IEEE C37.2
device number
51P-1
51P-2
50P/51P
89