RAILROAD-1-EP

 EuroProt familija
DIGITAL COMPLEX PROTECTION FOR SINGLE PHASE RAILROAD SYSTEM
 
RAILROAD-1-EP digital complex protection has been specially designed for single phase electrified railroad system. It contains a distance relay with 5 independently programmable quadrilateral zones, a fault locator, an autoreclosing system, and a thermal overload relay.
 
Main Features
 
  • Full scheme distance relay with 5 zones
  • All parameters of the zones can be set independently
  • 2 forward zones, 1 reverse zone, 2 programmable to be forward or reverse
  • All zones have quadrilateral characteristics
  • Two different measuring algorithms:
    • the first zone has a very fast three point measuring algorithm which is insensitive to CT saturation
    • the other 4 zones use an algorithm with Fourier filtering
  • Polarising for directional detection without dead zone at close-up faults
  • Instantaneous definitive trip at switch-on-to-fault
  • Signal from VT midget CB is used for VT circuit supervision
  • Built-in automatic fault locator
  • Operating time: 25 ± 5 ms
  • One shot auto-reclosing
  • Each impedance zone from 1 to 4 can be independently set to start or block auto-reclose
  • Operation of zone 5 (always reverse) generates definite trip
  • AR function can be blocked or enabled with parameter or hardware input or via user-defined logical equation
  • Complete thermal overload relay for best protection against line overheating
  • Separate current input for thermal overload relay
  • Thermal overload relay has pre-alarm and trip stages
  • Thermal overload relay takes the effect of previous heating into consideration (heating and cooling processes)
  • PROTLOG powerful logic with 8 user definable logic equations. User can add breaker-failure and other functions to the basic set. It can also eliminate usage of auxiliary contacts and time relays
  • Built-in software matrix to parameterise the functions of output contacts and indicating LEDs
  • Built-in self test function with dc supply check, trip/close circuit supervision and Watch Dog
  • One serial communication direction with two ports: (selectable with a parameter)
    • an isolated RS 232 connector on the front plate
    • a fiber optic connector on the rear plate
  • Two types of event recording:
    • event log for storing collected data of the last 50 protection operations
    • event sequence recorder with 1 ms resolution for 300 events
  • 16 isolated optical coupled binary inputs
  • 8 output contacts with user-defined functions. Each can be NO or NC
  • 6 programmable indicating LEDs
  • Man-machine communication via external PC or built-in LCD display
  • Battery backed-up RAM to store events and running real time clock
  • Clock synchronisation with external binary input or on serial link
 
Technical Data
 
Rated secondary current, In
 1 A ili 5 A
Rated secondary line voltage, Un 100 V, 110 V ili 200 V
Rated frequency 50 Hz
Overload capacity, in voltage circuits, continuous
Overload capacity, in current circuits, continuous
1 s		 1,2xUn
2xIn
100xIn (In=1 A), 50xIn (In=5 A)
Dynamic current limit 100xIn
Accuracy of digital impedance relays (> 50 % In) ± 5%
Accuracy of digital current relays (> 50 % In) ± 2%
Accuracy of digital timer ± 3 ms (10 ms steps)
± 12 ms (1s steps)
Impedance stages, hysteresis 15%
Reset ratio of current relays 95%
Optical isolated inputs 16 pcs, 220V DC
Output relays 8 pcs printrelays
Output relay contact type programmable by matrix: 8 pcs
Output contacts ratings,
rated switching voltage
continuous load current
switching on current
breaking current at 220 V dc,
pure conductive circuit
L/R = 40 ms
option: L/R = 40 ms
250 V
8 A
16 A

0,25 A
0,14 A
4 A
Auxiliary dc battery voltage (the same supply unit)
voltage tolerance
 220 V or 110 V
88 V to 310 V
Permissive ambient temperature 0o to 50o C
Insulation test (IEC 255) 2 kV, 50 Hz
5 kV, 1.2/50 µs
Disturbance test (IEC 255) 2.5 kV, 1 MHz
Electrostatic discharge test (ESD; IEC 801-2) 8 kV
Burst test, (IEC 801-4) 2 kV
Electromagnetic (radiofrequency) interference test IEC 801-3
 
Design, size
 
An EuroProt device is always rack-mounted type. One of the design form is suitable to mount directly into a standard 19" inch cabinet frame. The other designs are panel mounted devices with raised-hinged or flush mounted forms. Outline size of a 19 inch cabinet frame mounted device and a panel mounted device with flush mounted form is as follows.

Design
Width
Height
Depth
Rack mounting
483 mm
132,5 mm
201 mm
Panel mounting
490 mm
250 mm
250 mm

Terminal type at panel mounted design is as follows (terminal are placed onlydown).
Switchable: 02 to 20 terminals, WTL6/1 Weidmuller
Not switchable: 21 to 73 terminals, WDU 2,5 Weidmuller,
Weight 8 kg.
 
Optional Functions
 
  • Digital fault recorder with 80 sec recording time
  • RTU card with IEC 870-5-101, 870-5-103, MODBUS protocols and complete RTU functions
  • Additional binary input and output contact cards for RTU tasks
  • Graphic LCD display (320x240 pixels) on front plate for displaying measured values and one-line scheme