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GE 36C774345AAG04
Product Name: GE Spectra 36C Series Molded Case Circuit Breaker (MCCB)
Product Introduction: The 36C774345AAG04 is a member of GE’s Spectra 36C series of molded case circuit breakers. It is a 250 A frame-size MCCB configured with an LSIG four-stage electronic trip unit, designed for medium-to-large current industrial power distribution protection.
Detailed content
Technical Specifications & Performance Parameters:
- Series: Spectra 36C
- Frame Size: 250 A
- Rated Current: 225 A
- Number of Poles: 3-pole (3P)
- Rated Voltage: 600 VAC
- Rated Insulation Voltage: 690 VAC
- Rated Impulse Withstand Voltage: 8 kV
- Short-Circuit Breaking Capacity (Icu): 65 kA @ 480 VAC
- Service Short-Circuit Breaking Capacity (Ics): 50 kA @ 480 VAC
- Trip Unit Type: LSIG four-stage electronic trip unit (denoted by “A” in the code)
- Configuration Code: AG04
Functional Characteristics:
- Four-stage protection: L (overload) + S (short-time delayed short circuit) + I (instantaneous short circuit) + G (ground fault)
- Electronic trip accuracy: ±3%
- Adjustable long delay (L): 0.4–1.0 × In
- Adjustable short-time delay (S): 1.5–10 × In, time delay 0.05–0.4 s
- Adjustable instantaneous (I): 2–15 × In
- Ground fault protection (G): 0.2–1.0 × In, time delay 0–0.3 s
Structural Features:
- Rotary operating handle; supports manual and electrical operating mechanisms
- Silver alloy contacts for strong breaking capacity
- Flame-retardant enclosure rated UL94 V-0
- Supports DIN rail mounting and screw-fixed installation
Application Scenarios: Industrial power distribution cabinets, building power distribution, petrochemical installations, metallurgical systems, and municipal infrastructure.
Working Principle: The LSIG electronic trip unit continuously monitors the current flowing through all three phases. When current exceeds the adjustable thresholds for overload, short circuit, or ground fault, the corresponding protective stage operates to trip the breaker contacts, disconnecting the faulty circuit.
Installation Requirements:
- Install in accordance with the Spectra 36C panel design, using appropriate DIN rail or screw-fixed mounting.
- Ensure proper torque on all terminal connections.
- Verify the LSIG trip unit settings (L, S, I, G parameters) match the protected circuit requirements before energizing.
Usage Notes:
- The electronic trip unit requires proper adjustment for each application; incorrect settings may cause nuisance tripping or inadequate protection.
- Periodic inspection of contacts and trip unit calibration is recommended for critical installations.
