ABB Remote I/O RIO600 Installation And Commissioning Manual page 110

Section 6
Commissioning
Table 70: EFPTOC Settings
Name Values (Range)
Operation Off
On
Start Value 4...200
200...1000
Operate Delay Time 40..60000
Absolute Hysteresis 0.0...50.0
102
Settings
Unit
-
A
A
ms
A
Table 71: EFPTOC Technical data
Characteristic
Operation accuracy
Operate time accuracy (DMT)
Directional earth-fault fault detection DEFPTOC
Identification
Function description
Directional earth-fault fault detection
Functionality
The earth-fault function DEFPTOC is used as a directional earth-fault detection for
feeders.
The function starts when the operating quantity (residual current, Io) and polarizing
quantity (zero sequence voltage, Uo) exceed the set limits and the angle between them
is inside the set operating sector. Function operates with the definite time
characteristic, that is, the function operates after a predefined operate time of 40 ms
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 DEFPTOC can be described by using a module diagram. All
modules in the diagram are explained in the next sections.
Step Default
- On
1 4
5
10 40
0.1 0.1
Value
Depending on the frequency of the current
measured: f = f
±10% of the set value in the range of 4...25 A
±1.5% of the set value in the range of 26...1000 A
(Current measurement based on internal
calculation)
±1.0% of the set value or ±20 ms
IEC 61850 IEC 60617
identification identification
DEFPTOC I0>->
1MRS757488 H
Description
Operation Off/On
Start value for earth-
fault detection
Operate delay time
Absolute hysteresis
for current
n
ANSI/IEEE C37.2
device number
67N
Installation and Commissioning Manual
RIO600