Substation Automation

Transformer control IED(STC-K120)

Transformer control IED(STC-K120)

View all IEDs

IED to be installed in field control panel of main 154kV transformer
Use as control IED to protect main transformer and monitoring (control) IED for each bank
Provide monitoring and control input/output contact point on OLTC or cooling device
Apply monitoring/measurement/control/interlock function
Apply 7-inch TFT LCD equipped with touch screen

Main functions

  • Main transformer control function
  • Field monitoring (control) function of main transformer in each bank
  • Apply monitoring/measurement/control/interlock function
  • Automatic frequent monitoring function
  • IEC 61850 Station Bus Interface
  • Serial/Ethernet communication function for field/remote access
  • Provide customized DI, DO, LED, and function key

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
Electric current 5A
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
RS-232 Serial 9pin (Male-Type), 2 port Operational Software , Reserve
Time sync. IRIG-B 120 or SNTP
Enter Contact 48 points
Contact output 28 points
CT 4 channels
PT 5 channels
AI 4~20mA DC : 10 channels
RTD : 12 channels
Display TFT Color Graphic LCD 7" (800 x 480)
Button 18
LED 42

Apparent Dimension