Substation Automation

Short-distance T/L protection IED(SLP-K140)

Short-distance T/L protection IED(SLP-K140)


  • Current differential motion protecting function
  • Distance protecting function to provide quadrilateral operation area
  • Over-current/low-voltage-based breakdown extracting function
  • High speed one-time re-closing function
  • Measurement/monitoring/control function
  • Customized DI/DO/LED/function keys
  • Configure and apply customized control logics
  • IEC 61850 station bus communication
  • IEEE C37.94-based current differential motion protecting communication
  • Field/remote access serial (USB type)/Ethernet communication

General Specification

Division Item Specification
Terms of use Ambient temperature -25℃ ~ +55℃
Relative humidity 10% ~ 90%
Elevation 1,500m less than
Rated Frequency 60Hz
Voltage Phase voltage : 110/√3V, Interlinear voltage : 110V
Electric current 5A
Power DC 125V (90~140V)
Outward form Size 487 x 266 x 270mm (W x H x D)
Form Stand-Alone Type
Weight 10kg less than
Quality of the material Aluminum

Hardware Specification

Division Specification Note
Communication port Ethernet 100Base-FX, 2 channels
connector : ST type, Multi-mode, 1310nm
IEC 61850
100Base-T, 1 channels, Twisted-pair TCP/IP
RS-232 Female-Type D-SUB 9pin 2 channels Operational Software/Reserve
IEEE C37.94 2 channels, STtype connector PCM
Time sync. IRIG-B120 or SNTP
DI 36 points
DO 32 points
CT 4 channels
PT 5 channels
Button 18
LED 42
LCD 7" Color TFT-LCD 800x480

Apparent Dimension