Substation Automation

Low frequency protection IED(SUF-K110)

Low frequency protection IED(SUF-K110)

Controlling and interlocking for field equipments such as circuit breakers and disconnecting switchgears
Applied for 170kV GIS PT & ES bay
Programming trip and control logics
Editing the single line diagram on the dedicated PC S/W
Saving the events in 1ms resolution
Recording fault waveforms in IEEE C37.111 COMTRADE format
Self-monitoring on a regular basis

Main functions

  • 8-step definite-time underfrequency (81U) protection)
  • Automatic busbar selection for frequency measurement
  • Fast frequency measurement in every ½ cycle
  • High-precision frequency measurement within the error range of ±5mHz
  • Instantaneous and definite-time phase undervoltage (27) protection for each bus)

General Specification

Division Item Specification
Terms of use Ambient temperature -25℃ ~ +55℃
Relative humidity 10% ~ 100%
Elevation 1,500m less than
Rated Frequency 60Hz
Voltage Phase voltage : 110/√3V, Interlinear voltage : 110V
Power DC 125V(90~140V)
Outward form Size 445 x 255 x 247mm (W x H x D)
Form Stand-Alone Type
Weight 9.5kg less than
Quality of the material Aluminum

Hardware Specification

Division Specification Note
Communication port Ethernet 100Base-FX, 2 channels IEC 61850
100Base-T, 1 channels TCP/IP
USB B-Type 1 channels Wired-X
Time sync. IRIG-B 120 or SNTP
RS-232 D-SUB 9pin (Male-Type), 1 port Development purposes
Enter Contact 64 points
Contact output 28 points
PT 8 channels
AI 2 channels
Display TFT Color Graphic LCD 7" (800 x 480)
Button 18
LED 26

Apparent Dimension