PLUTON presents a new SOTA protection and monitoring system More details
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Main traction network monitoring and protection system SMTN-3 technical parameters

Name of parameter Unit of measurement Value
Main parameters
Number of current measuring channels  pc. 1
Number of voltage measuring channels pc. 1
Type of current sensor - Shunt
Power circuit voltage measuring range  V -2000...+2000*
-8000...+8000*
Input voltage range for power circuit current measuring
channel (DC generated voltage on shunt)		 V -0,5...+0,5
Current measuring range
where:
Ish — shunt rated current;
Ush — voltage drop on shunt under rated current.		 А Imax= ± (0,4•Ish)/Ush 
Measured values sampling period  mks  50
Current measuring accuracy, max, of Ish % 0,5
Voltage measuring accuracy, max, of measuring range % 0,5
Insulation strength between measuring module power circuit and power supply circuit, minimum kV 10
  (30)*
Measured values
- - - Current (current channel);
- Voltage (voltage channel);
- Power (calculated);
- Energy (calculated);
- Test current (Line tester channel);
External signals
Number of high speed digital outputs   pc. 5
Digital outputs designation  - Signals issuing is set individually for each output under one or several protection functions tripping
Number of digital inputs  pc. 5
Digital inputs designation - Set individually for each input:
- HSCB condition control;
- external opening signal;
- time synchronization.
Power supply
Rated operating voltage V ⎓5; 12; 24 ; 48, 110; 220
≂110; 220
SMTN-3 system max consumed power, max W 15
Permissible voltage long-term tolerances % -15…+10
Communication interfaces
Data transfer interface  - Ethernet
Data transfer protocols  - WEB technologies
ModBus TCP/IP
Reliability    
Mean time between failures (MIL-HDBK-217F) hours 100 000
Total average lifetime
(under condition of the required technical maintenance activities provision)		  years  25
Design  
Protection degree of modules in acc. with IEC/EN 60 529/VDE 0470-1  - IP 3X
Cooling  - natural, air
Type of modules mounting  - DIN-rail (TH 35, DIN 46277-3 (EN 50022)
Protection functions
Code ANSI     50 
 76  

 

 59 
 27 
 49 
BF		 - Instantaneous overcurrent;
- Overcurrent protection;
- Current rate of rise protection;
- Current increment directional
  protection;
- Overvoltage protection;
- Undervoltage protection;
- Thermal protection;
- Breaker failure.
Period of data processing by protective functions algorithms  mks 50
Number of settings groups   2
Measuring and logging functions
Measured values  - - Current;
- Voltage;
- Power;
- Energy;
- HSCB tripping counter;
- Test current (line tester channel).
Number of recorded oscillograms under emergency event** occurrence pc.                                      2
- “Fast track”
- “Slow track”
Emergency oscilligraph records coverage width - - Current curve;
- Voltage curve;
- Digital inputs and outputs state
  diagram;
- Astronomical time;
- Type of tripped protection.
Emergency oscilligraph records coverage depth points 2048 (for each measured value)
Signals sampling frequency in “Fast track” record kHz 20
Signals sampling period in “Slow track” record Hz 10
“Fast track” record time coverage depth ms 100
“Slow track” record time coverage depth  s 100
Prehistory *** record time coverage depth in “Fast track”
record		 points Set
0 - 2048
Prehistory *** record time coverage depth in “Slow track”
record 		 points Set
0 - 2048
Number of emergency oscillograph stored records  - 200
Local human interaction interfaces
 -  - LCD touch-screen or
LED indication and control element
Operating conditions
Ambient temperature range °C +1…+60
Relative air humidity, under temperature (upper value) % 60, 20°C
(80, 25°C)

* - depending on measuring module design, for application in city electric transport with traction network voltage up to 1000 V or for application
in railway transport with traction network voltage up to 4000 V
**- one of protections tripping is considered to be emergency event
*** - prehistory is a diagram of measured values up to emergency event occurrence