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GE 133D6343G1

The GE 133D6343G1 is a 133D series molded case circuit breaker (MCCB) with a 63 A rated current, 4-pole (4P) configuration, and a G-type electronic trip unit (LSIG protection). It is used for branch circuit protection in low-voltage power distribution systems.
  • Product Type: Molded Case Circuit Breaker (MCCB)
  • Series: GE 133D series modular MCCB
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Detailed content

  • Frame Rating: 100 A (133D standard frame)
  • Rated Current (In): 63 A
  • Poles: 4P (4-pole)
  • Trip Unit: G-type electronic trip unit (LSIG protection, denoted by “G1”)
  • Rated Insulation Voltage (Ui): 690 VAC / 750 VDC
  • Rated Operating Voltage (Ue): ≤690 VAC
  • Rated Short-Circuit Breaking Capacity (Icu): 36 kA @ 415 VAC
  • Rated Service Short-Circuit Breaking Capacity (Ics): 25 kA @ 415 VAC
  • Protection Functions (LSIG):
    • L​ — Long-time delay (overload)
    • S​ — Short-time delay (short circuit)
    • I​ — Instantaneous (short circuit)
    • G​ — Ground fault
  • Additional Features:
    • Wide-range current setting via electronic trip unit
    • Electric operator interface for remote open/close
    • Overvoltage/undervoltage trip function
  • Mechanical Life: ≥10,000 operations
  • Electrical Life: ≥5,000 operations at rated current
  • Instantaneous Trip Time: ≤20 ms
  • Operating Temperature: –25°C to +70°C
  • Protection Rating: IP40
  • Materials:
    • Housing: Flame-retardant PC/ABS alloy (UL94 V-0)
    • Arc chute: Metal grid arc-splitting
    • Contacts: Silver alloy
    • Terminals: Copper alloy, tin-plated
  • Structural Features: Fixed installation (133D fixed structure); front operating handle with open/closed/tripped indication; top/bottom wiring options; field-settable trip unit panel
  • Working Principle: The electronic trip unit samples current signals via CT or direct measurement and compares them against preset protection curves. On overload, the trip coil is actuated after an inverse-time delay, releasing the spring mechanism to rapidly open the main contacts. Ground fault and instantaneous faults trigger immediate tripping.
  • Applications: Low-voltage power distribution branch protection, motor circuits, feeder circuits, and general load circuits
  • Installation Requirements: Fixed mounting in switchgear; ensure proper torque on terminal connections; wire according to top/bottom configuration selected.
  • Usage Notes: Periodically verify trip unit settings match the protected load; the electronic trip unit allows field adjustment without replacement; ensure proper derating at elevated ambient temperatures.

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