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GE 12STV11A1A

GE Multilin 12STV series Static Transfer Switch (STS) controller, used in UPS systems for seamless automatic transfer between two power sources.
  • Product Introduction: A static transfer switch controller designed to ensure uninterrupted power supply to critical loads by automatically switching between two power sources in UPS systems.
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Detailed content

  • Technical Specifications:
    • Rated Input Voltage: 120/208/240/277/480 VAC (configurable)
    • Rated Output Current: 100 A (continuous)
    • Switching Time: < 4 ms (typical)
    • Inputs: 2 inputs, 1 output
    • Control Voltage: 24 VDC / 120 VAC (selectable)
    • Communication Interface: RS-485 (Modbus RTU protocol)
    • Switching Speed: 2–4 ms (typical)
    • Parallel Operation Time: Unlimited (under synchronous conditions)
    • Mechanical Life: Infinite (no mechanical parts)
    • Electrical Life: ≥ 1,000,000 switching operations
    • Operating Temperature: -20 °C to +55 °C
    • Protection Grade: IP20 (panel mount)
  • Functional Features:
    • Static switch switching — no mechanical contacts, no arc
    • Priority setting: primary/backup source priority configurable
    • Synchronization detection: automatically detects synchronism between two sources; parallel operation when synchronized
    • Bypass function: manual/automatic bypass switching supported
    • Self-test function: periodically auto-detects thyristor status
    • LED status indicators: source A, source B, output, fault status at a glance
  • Material Composition:
    • Controller Housing: Flame-retardant ABS engineering plastic (UL94 V-0)
    • Thyristor Module: GE industrial-grade SCR/TRIAC
    • PCB: FR-4 high-TG material with conformal coating (three-proof paint)
    • Terminals: Copper with tin plating, bolt-fixed
  • Structural Features: Panel-mount design, dimensions approx. 144 × 144 × 89 mm (W×H×D). Front panel with 4 status LEDs and 3 operation buttons; rear with power input, two AC inputs, AC output, and communication terminals.
  • Applications: UPS systems in data centers, critical facilities, and industrial plants requiring zero interruption power transfer between two sources.

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