NSPTOC can also be used to detect broken conductors.
The operating time characteristic is according to the definite time (DT).
Operation principle
The
Operation
setting is used to enable or disable the function. The corresponding
parameter values are "On" and "Off".
The operation of NSPTOC can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
Level
detector
t
Timer
I
2
NSPTOC_Start
NSPTOC_Oper
GUID-8327A6F2-E793-4CC4-A8F7-CBDB4E34DBA7 V1 EN
Figure 79:
Functional module diagram
Level detector
The measured negative-sequence current is compared to the set
Start Value
. If the
measured value exceeds the set
Start Value
, Level detector activates the Timer
module.
Timer
Once activated, Timer activates the
NSPTOC_Start
output. When the operation
time has reached the value of
Operate Delay Time
, the
NSPTOC_Oper
output is
activated.
Signals
Table 84:
NSPTOC Input signals
Name
Type
Default
Description
I
2
SIGNAL
0
Negative phase
sequence current
Table 85:
NSPTOC Output signals
Name
Type
Description
NSPTOC_Start
BOOLEAN
General start of function
NSPTOC_Oper
BOOLEAN
General operate of function
Section 6
1MRS757488 H
Commissioning
138
RIO600
Installation and Commissioning Manual
Summary of Contents for Remote I/O RIO600
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