Settings
Table 86: NSPTOC Settings
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - On Operation Off/On
Start Value 4...1000 A 1 12 Start value
Reset Delay Time 0...60000 ms 5 20 Reset delay time
Operate Delay Time 40…200000 ms 1 40 Operate delay time
Table 87: NSPTOC Technical data
Characteristic Value
Operation accuracy Depending on the nominal frequency of the
current measured: f = f
n
Current:
±1.5% of the set value or ±0.02 A
I
Fault
= 2 × set value = <36 ms
I
Fault
= 10 × set value = <30 ms
Operate time accuracy
±1.0% of the set value or ±20 ms
6.1.6.8 Fuse failure supervision SEQSPVC
Identification
Description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Fuse failure supervision SEQSPVC FUSEF 60
Functionality
The fuse failure supervision function SEQSPVC is used to block the voltage-
measuring functions when failure occurs in the secondary circuits between the voltage
transformer (or combi sensor or voltage sensor) and the protection relay to avoid
malfunctions of the voltage protection functions.
SEQSPVC has two algorithms, a negative sequence-based algorithm and a delta
current and delta voltage algorithm.
A criterion based on the delta current and the delta voltage measurements can be
activated to detect three-phase fuse failures which usually are more associated with
the voltage transformer switching during station operations.
Operation principle
The Operation setting is used to enable or disable the function. The corresponding
parameter values are "On" and "Off".
1MRS757488 H Section 6
Commissioning
RIO600 139
Installation and Commissioning Manual
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