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Underground Line - Compact Secondary Substation

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ENTEC underground line Compact Secondary Substation providing advertizing space and better city site.

General

  • Filling out the demerit in separate operation of pad mount protection device from transformer, and decreasing transformer failure rate by building in transformer protection fuse, provide better reliability and convenient use of product such as fuse replacement. Especially, it provides quick disconnection of a fault area so that blackout area can be optimized, in other words, recovering time shall be quicker.
    Providing advertizing space and better city site, inventing a new additive economical value.
    Compact design with friendly look provides less interfere with pedestrians and it makes less complain from neighbor merchants compared with rectangle design pad mount switchgear.
    Optimized installation area by Double stack built-in equipment

Characteristics

  • Insulation method : Epoxy Mold insulation(Solid dielectric) - Epoxy (cycloaliphatic), Silicone rubber application.- Due to materials characteristics, binding energy is big and it provides excellent heat resistance and hydrophobic
  • Circuit breaker operation mechanism : PMA mechanism. Min. interruption within 3 Cycle
  • Load break switch operation mechanism : Toggle method of Spring Charging mechanism. M2 class durability.
  • Interruption method : Main circuit - Vacuum Interrupter use Earthing circuit FR3, environmentally friendly Plant oil applied method.
  • Bushing : Load break switch - 600A Interface IEEE 386
    Circuit Breaker - 200A Interface IEEE 386

Control Panel

Features

  • - Power supply Monitoring (AC Power supply & Battery)
  • - Fault Indications
  • - Local/Remote Control
  • - Grounding indication and Live voltage indication
  • - Communication status indication
  • - Remote Communication
    : Front port (Data downloading and Setting uploading)
    : Rear Port (RTU Communication - DNP3.0 Protocol, Other protocols option)
  • - Un-interruptable Power Supply
  • - Emergency Operation (Circuit Breaker)

Protection

Circuit Breaker

  • Time Current Curve(TCC) provision : IEEE, IEC and 37 non-standard inverse time curves and User programmable.
  • Protective settings in nonvolatile memory
  • Phase/Ground Overcurrent protection(51P, 51G)
  • Instantaneous Overcurrent protection(50P, 50G)
  • Phase high current protection
  • Negative sequence overcurrent protection(46)
  • Under voltage / Under frequency
  • Cold Load Pickup
  • Transformer Overlaod & Heat monitoring and tripping
  • Transformer Overheat monitoring and tripping

Load Break Switch

  • Phase/Ground fault current indication
  • Phase Loss/Disconnection chceck
  • Synchronism check

Applied Standard

Insulation Test

  • AC Power frequency withstand voltage :IEC 255-5 (2kV, 60sec)
  • Impulse withstand voltage : IEEE 62.41 (Combination Wave applied)
    Voltage wave : 1.2/50㎲, 6㎸ Current wave : 8/20㎲, 3㎄
  • Surge Withstand Capability : ANSI/IEEE C37.90.1
    EFT/BURST Test : 4kV (2.5kHz)
    Vibration SWC test : 2.5kV (1MHz)
  • Radiated electromagnetic Interference from Transceivers : ANSI/IEEE C37.90.2
    35V/m, 25㎒~1000㎒

Mechanical Test

  • Vibration Test (KSC IEC 80255-21-1)
    10㎐~150㎐, 0.035 ㎜, 0.5G(4.9㎨), 1cycle(about 8min)
    10㎐~150㎐, 1G(9.8㎨), 20cycle(about 160min)
  • Shock test (KSC IEC 60255-21-2)
    5G(49㎨), 11㎳, 3Pulse
    15G(147㎨), 11㎳, 3Pulse
    10G(98㎨), 16㎳, 1 000Pulse
  • Environmental endurance test : KSC 0220, KSC 0221
    (Min.: -30±3℃, Max.: +70도±2℃)

Ratings

Circuit Breaker Load Break Switch
Rated voltage 25.8㎸ 25.8㎸
Rated current 200A 630A
AC Power frequency
withstand voltage
60㎸, 1min 60㎸, 1min
Impulse withstand voltage Main circuit :125kV BIL
Earthing circuit :150㎸ BIL
Main circuit :125kV BIL
Earthing circuit :150㎸ BIL
Rated short circuit current 12.5㎄/ 3 cycles
[short time current : 10kA/0.17sec]
12.5㎄/1sec

ENTEC - Electric & Electronics

CEO Greetings | Vision | Hisotry | Awards | Organization | Location | Power Distribution Automation | Metro & Railway System Switchgear | Power Transmission & Distribution | Nuclear Power Plant MOtor Control & Circuit Breaker | LED | Overhead Line SOlid Recloser | SF6 Gas Insulated Recloser | Solid ECO Load Break Switch | SF6 Gas Insulated Polwe Mount Load Break Switch | SF6 Gas Insulated Auto Sectionalizer | Epoxy Insulated Fault Interrupter (EFI)
Underground Line SOlid Insulated Pad Mount Load Break Switch | SF6 Gas Insulated Pad Mount Load Break Switch | Solid Insulated Pad Mount Switchgear | SF6 Insulated Pad Mount Switchgear | Solid Insulated Ring Main (SRMU) | SF6 Gas Insulated 5 & 6 Way Load Break Switch | Compact Secondary Substation | Substation Switchgear Solid Insulated Switchgear (SIS) | Cubicle Type Gas Insulated Switchgear (GIS) | Automatic Load Transfer Switch (ALTS) | Nuclear Power Switchgear DC Circuit Breaker | Q-Class DC Circuit Breaker | Railway DC Switchgear | High Speed Circuit Breaker (HSCB) | DC Disconnector Switch | Silicon Rectifier | Power IT ETSWC101 | ETCPU200 | EasyView | ETPCS-50 | AMR/AMI | EVD - Voltage Detector