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GE CR307BT94TC2AASTA

  • Product Name:​ GE CR307 NEMA Size 2 Combination Magnetic Starter
  • Product Description:​ A 300/400‑Line combination magnetic starter with integrated disconnect, designed for industrial motor starting and protection. The CR307 typically features a thermal‑magnetic circuit breaker as the disconnect means.
  • Technical Specifications:
    • Brand: GE (now ABB)
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Detailed content

    • Series: CR307 (CR307‑CR308 family)
    • Type: NEMA Size 2 Combination Magnetic Starter
    • Maximum Continuous Ampere Rating: 45 A
    • Maximum Voltage: 600 V
    • HP Ratings (AC Motors):
      • Single‑phase: 3 HP @ 115 V, 7.5 HP @ 230 V
      • Poly‑phase: 10 HP @ 200 V, 15 HP @ 230 V, 25 HP @ 460/575 V
    • Coil Voltage: Configuration dependent (60 Hz: 115 V, 200/208 V, 230 V, 460 V, 575 V, 600 V; 50 Hz: 110 V, 220 V, 380 V, 440 V, 550 V, 600 V)
    • Overload Relay: Three‑leg block type, ±10% field‑adjustable tripping current via dial
    • Disconnect: Thermal‑magnetic circuit breaker (CR307) or fusible/non‑fusible disconnect switch (CR308)
  • Standard Features:
    • Strongbox Coil: Encapsulated coil resistant to moisture, dirt, and mechanical damage
    • Adjustable Overload Relay: ±10% field adjustment of tripping current
    • Trip Indicator: Yellow indicator visible when relay trips (right of reset arm)
    • Interlock Safety: Disconnect switch mechanically interlocked with enclosure door
  • Functional Features:
    • Full‑voltage magnetic starting of AC motors
    • Motor branch short‑circuit protection via breaker/disconnect
    • Overload protection for running and stalled motor conditions
  • Application Scenarios:​ Industrial motor control, pump and fan control, conveyor systems, HVAC, manufacturing machinery.
  • Installation Requirements:
    • Mount on a sturdy vertical support
    • Provide branch circuit protection per National Electrical Code (NEC)
    • Ensure coil voltage matches control power supply
    • Door interlock prevents opening unless handle is in OFF position
  • Usage Notes:
    • Always disconnect power before servicing or coil removal
    • Overload relay tripping current adjustable ±10% via dial — do not file contacts, replace when silver tip worn
    • Check for welded contacts via audible click or continuity test
    • Refer to GEH‑4776 documentation for renewal parts
    • Now supported by ABB Electrification (electrification.us.abb.com)

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