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
I2
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
To Next Page
Loading...
