Earth-Fault Fault Detection - ABB Remote I/O RIO600 Installation And Commissioning Manual

Section 6
Commissioning
Name Values (Range)
Min Operate Voltage -
Voltage Mem Time -
Abs Hyst Oper Qty 0.0...100.0
Abs Hyst Pol Qty 0...2500
6.1.6.5
100
Unit
V
ms
A
V
Table 68: DPHPTOC Technical data
Characteristic
Operation accuracy
Operate time accuracy (DMT)

Earth-fault fault detection

Non-directional earth-fault fault detection EFPTOC
Identification
Function description
Non-directional earth-fault fault
detection
Functionality
The earth-fault overcurrent fault detection function EFPTOC is used as a non-
directional phase-to-earth fault detection. The function starts when the residual
current exceeds the set limit. Function operates with definite time characteristic, that
is, the function operates after a predefined operate time and resets when the fault
current disappears.
Operation principle
The Operation setting is used to enable or disable the function. The corresponding
parameter values are "On" and "Off".
The operation of EFPTOC can be described by using a module diagram. All modules
in the diagram are explained in the next sections.
Step Default
- 500
- 100
0.1 3
0.1 200
Value
Depending on the nominal frequency of the
current measured: f = f
Current: ±1.5% of the set value
Voltage: ±1.5% of the set value
Phase angle: ±2⁰
±1.0% of the set value or ±20 ms
IEC 61850 IEC 60617
identification identification
EFPTOC I0>
1MRS757488 H
Description
Minimum operating
voltage to allow
directional criteria
Voltage memory
time
Absolute hysteresis
for operating
quantity
Absolute hysteresis
for polarizing
quantity
n
ANSI/IEEE C37.2
device number
51N
Installation and Commissioning Manual
RIO600