InteliLite
NT
AMF26-P, SW version 2.4, ©ComAp – January 2016 34
AMF26-P-2.4 Reference Guide.pdf
CT location
There are two options of CT location.
a) Load
b) Gen-Set
According to the connection you use you should set either CT location: Load or CT location: Gen-Set.
Earth Fault measurement (module)
The Earth Fault protection is done by extension module IL-NT-EFCPM or IL-NT-EFCPM2.
Technical characteristics
- Input current range up to 8,32 mA (IL-NT-EFCPM)
- Input current range up to 10 mA (IL-NT-EFCPM2)
- Measurement range from 0,03 to 5A
- Operating frequency 50 or 60 Hz
- Tripping current software programmable from 0,03 to 5 A or DISABLED
- Tripping delay software programmable from 0,03 to 5 seconds
- Included two binary outputs and one binary input (in case of IL-NT-EFCPM)
- Included seven binary inputs or seven binary outputs (in case of IL-NT-EFCPM2)
For more technical details see IL-NT-EFCPM interface and IL-NT-EFCPM2 interface parameters.
Earth Fault Current protection has been adjusted
- The Earth Fault Current protection is evaluated regardless of the MCB state.
- The protection is newly enabled also when MCB is closed.
Opearting principle
The IL-NT-EFCPM uses toroidal transformer connected to the earth wire (Figure 2). When the
measured current exceeds the set value, this indicates that part of the current is dispersed to earth
and after the set Earth Fault Del then Earth Fault Sd protection, AL EARTH FAULT and BREAKER
TRIP output are activated. Earth Fault protection is not active when MCB is closed and also when EF
Protection: DISABLED.
For manual protection simulation can be used EF Prot Test or Earth Fault Protection Test function.
To Next Page
Loading...
