Settings
Table 70: EFPTOC Settings
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - On Operation Off/On
Start Value 4…200
200…1000
A
A
1
5
4 Start value for earth-
fault detection
Operate Delay Time 40..60000 ms 10 40 Operate delay time
Absolute Hysteresis 0.0…50.0 A 0.1 0.1 Absolute hysteresis
for current
Table 71: EFPTOC Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the current
measured: f = f
n
±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)
Operate time accuracy (DMT)
±1.0% of the set value or ±20 ms
Directional earth-fault fault detection DEFPTOC
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional earth-fault fault detection DEFPTOC I0>-> 67N
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.
Section 6 1MRS757488 H
Commissioning
102 RIO600
Installation and Commissioning Manual
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