Earth-Fault Protection; Non-Directional Earth-Fault Protection Efxptoc; Identification; Function Block - ABB RELION REX640 Technical Manual

1MRS759142 C
4.2
4.2.1
4.2.1.1
4.2.1.2
4.2.1.3
4.2.1.4
REX640
Technical Manual

Earth-fault protection

Non-directional earth-fault protection EFxPTOC

Identification

Function description
Non-directional earth-fault protection,
low stage
Non-directional earth-fault protection,
high stage
Non-directional earth-fault protection,
instantaneous stage

Function block

GUID-82AD69E2-A313-4EDA-B666-86497DB366A6 V1 EN
Figure 219: Function block

Functionality

The non-directional earth-fault protection function EFxPTOC is used as non-
directional earth-fault protection for feeders.
The function starts and operates when the residual current exceeds the set limit. The
operate time characteristic for low stage EFLPTOC and high stage EFHPTOC can be
selected to be either definite time (DT) or inverse definite minimum time (IDMT). The
instantaneous stage EFIPTOC always operates with the DT characteristic.
In the DT mode, the function operates after a predefined operate time and resets when
the fault current disappears. The IDMT mode provides current-dependent timer
characteristics.
The function contains a blocking functionality. It is possible to block function outputs,
timers or the function itself.

Analog channel configuration

EFxPTOC has one analog group input which must be properly configured.
Protection functions
IEC 61850 IEC 60617
identification identification
EFLPTOC Io>
EFHPTOC Io>>
EFIPTOC Io>>>
Section 4
ANSI/IEEE C37.2
device number
51G/51N-1
51G/51N-2
50G/50N
403