Description
GE SFLA36AT0250
Technical Specifications:
- Series: GE Spectra RMS
- Frame Type: SF250 (70–250 A range)
- Rated Current: 250 A
- Rated Voltage: 600 V AC
- Number of Poles: 3
- Interrupting Capacity: 65 kA at 480 V AC; 100 kA at 240 V AC; 25 kA at 600 V AC
- Trip System: Digital RMS solid-state electronic trip
- Trip Functions: Long-time, short-time, instantaneous
- Certification: UL 489 (File E-11592), CSA LR 40350
- Reverse Feed: Suitable
- Field Installable: Yes
Functional Features:
- sensing trip system accurately detects non-sinusoidal (harmonic) currents for reliable overload and short-circuit protection
- Configurable long-time, short-time, and instantaneous trip thresholds to match various load characteristics
- Field-installable design enables on-site adjustment and maintenance without factory return
- Compatible with Spectra series accessories (shunt trip, undervoltage release, auxiliary contacts, bell alarm)
- Reverse-feed suitable, allowing use in back-fed distribution and generator applications
Application Scenarios:
- Commercial buildings: distribution protection for lighting, HVAC, and elevator systems in malls, offices, and hotels
- Data centers: power protection for servers, switches, and critical IT equipment
- Industrial plants: motor, fan, and pump feeder protection on production lines
- Power distribution panels in utility and industrial switchgear
Performance Parameters:
- High interrupting capacity (65 kA @ 480 V) handles substantial fault currents
- Precise RMS current detection ensures accurate protection under harmonic-rich loads
- Fast-acting electronic trip unit minimizes fault-clearing time
Material and Structural Characteristics:
- Molded case construction with glass-polyester insulating housing
- Copper and silver-alloy contacts for low contact resistance and high endurance
- Steel and aluminum internal mechanism components
- Standard 3-pole footprint compatible with Spectra SF250 panel cutouts
- Front-mounted trip unit with adjustment dials
Working Principle: The breaker continuously senses phase current through internal current transformers. The RMS solid-state trip unit digitizes the current waveform, computes true RMS values, and compares them against configured long-time, short-time, and instantaneous thresholds. When a threshold is exceeded for the set time delay, the trip unit energizes the shunt release mechanism, mechanically opening the contacts to interrupt fault current. Installation Requirements:
- Mount in a switchboard, panelboard, or motor control center using the SF250 frame cutout
- Connect line and load lugs per torque specifications in the GE installation instructions
- Ensure proper phase conductor sizing per the 250 A rating and applicable electrical codes
- Verify reverse-feed suitability when used in back-fed applications
Usage Notes:
- Installation and maintenance must be performed by qualified electricians
- Select the breaker rating to match actual load current, voltage, and available fault current
- Periodically exercise the breaker mechanism and verify trip unit settings
- Use only GE-approved Spectra series accessories to maintain UL/CSA certifications
