GE SFLA36AT0250

Technical Specifications

Function Features

• Digital RMS Sensing: Measures true RMS current for accurate protection against sinusoidal and non-sinusoidal loads (VFDs, SMPS), eliminating false trips from harmonic distortion.
• LSI Protection: Long-Time (inverse-time overload), Short-Time (adjustable time/current for coordination), and Instantaneous (fixed/magnetic for high faults) functions cover all overcurrent scenarios.
• Adjustable Settings: Field-installable rating plugs set ampacity (70–250A); front-panel dials tune short-time pickup (0.5–10×Iₙ) and time delay (0.05–10s); instantaneous pickup (3–15×Iₙ) tracks short-time settings for coordination.
• Current-Limiting Design: Reduces fault energy let-through, minimizing thermal/mechanical stress on cables, transformers, and motors.
• Bolt-On Mount: Secure panelboard/switchgear installation with standard hardware; compatible with NEMA enclosures.
• Wide Interrupt Ratings: 100/65/25 kAIC across 240/480/600VAC ensures protection at all system voltages.
• Global Certifications: UL, CSA, CE, HACR, NOM compliance for use in North American and international systems.
• Harmonic Tolerance: Digital sampling handles up to 30% THD without performance degradation.
• Field Serviceability: Rating plugs and lugs are field-replaceable; no special tools needed for configuration.
• Visual Status Indicators: Pivot/toggle handle shows ON/TRIPPED/OFF states for quick diagnostics.

Application Scenarios

• Industrial Panelboards: Protects branch circuits in manufacturing plants, handling mixed loads (motors, heaters, VFDs) with adjustable LSI settings.
• Commercial Building Distribution: Powers HVAC, lighting, and elevator systems in high-rise buildings; meets NEC/CEC coordination requirements.
• Motor Control Centers (MCCs): Guards 3-phase motors against overload, locked rotor, and short-circuit faults; coordinates with contactors and overload relays.
• Switchgear Assemblies: Used in medium-voltage switchgear for secondary-side protection; current-limiting reduces arc-flash hazards.
• Data Centers: Protects UPS systems, server racks, and cooling infrastructure from harmonic-rich, high-current faults.
• Petrochemical Facilities: Installed in Zone 2/Class I, Div 2 non-hazardous areas to protect process pumps and compressors.
• Water/Wastewater Treatment: Guards pump stations and aeration systems against overloads from variable-speed drives.
• Renewable Energy Inverters: Protects grid-tie inverters and DC/AC distribution in solar/wind farms; handles non-sinusoidal inverter currents.

Compatibility and Integration

• Rating Plugs: Uses GE Spectra RMS™ front-mounted rating plugs (e.g., 250A, 200A) for ampacity adjustment; no tools required for replacement.
• Lug Compatibility: Accepts 8 AWG to 350 kcmil copper/aluminum lugs (standard compression or bolt-on); rated for 600VAC/250A.
• Controller Integration: Works with GE Multilin relays, Allen-Bradley PLCs, and Siemens S7 systems via auxiliary contacts (optional); supports remote monitoring via Modbus (with add-on communication module).
• Panelboard Compatibility: Fits standard NEMA 1/3R/4/4X/12 panelboards; bolt-on terminals align with industry mounting patterns.
• Coordination with Fuses: Coordinates with Class J/K/L fuses for selective tripping; short-time delay prevents nuisance tripping during inrush currents.
• Replacement for Legacy Breakers: Drop-in replacement for older GE SF250-frame MCCBs; no panel modifications needed.
• Maintenance Tools: Compatible with GE Trip Unit Test Kits for verifying LSI settings without system shutdown.