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GE SKPA36AT1200
Product Name: GE Spectra RMS SKPA36AT1200 — 1200 A, 600 V, 3-Pole Bolt-On Molded Case Circuit Breaker
Overview: The SKPA36AT1200 is a high-capacity 3-pole molded case circuit breaker from GE’s Spectra Series SK frame, rated for 1200 A at 600 VAC. It features a Spectra RMS digital solid-state trip system with an electronic LSI (Long-Time, Short-Time, Instantaneous) interchangeable trip unit, providing adjustable and precise circuit protection for demanding industrial power distribution.
Detailed content
Technical Specifications:
- Manufacturer: General Electric
- Series / Frame: Spectra Series, SK Frame
- Type: SKPA
- Amperage: 1200 A
- Voltage: 600 VAC (3-phase)
- Poles: 3
- Trip System: Spectra RMS digital solid-state, electronic LSI interchangeable trip unit
- Protection Functions: LSI — Long-Time, Short-Time, and Instantaneous
- Interrupting Rating: 100 kA @ 480 V (some sources cite 65 kA @ 480 V); 200 kA @ 240 V; 42 kA @ 600 V (UL)
- Mounting Type: Bolt-On / Front Mount
- Connection: Bolt-On (lugs not included)
- Rating Plug: Required for ampere rating configuration (e.g., SRPK1200A1200)
- Certifications: UL Listed, CSA Certified
- Dimensions (H × W × L): 15.51″ × 8.25″ × 7.09″
- Reverse Fed Applications: Suitable
Key Features:
- Digital RMS sensing trip system for accurate, adjustable protection
- Interchangeable trip unit allows flexible configuration
- Very high interrupting capacity for severe fault conditions
- Current limiting design
- Bolt-on connection for secure, reliable mounting
- Solid-state electronic trip for stable performance across temperature variations
Working Principle: The Spectra RMS solid-state trip system continuously senses the RMS value of the current. The LSI logic provides long-time overload protection, short-time delay for selective coordination, and instantaneous tripping for high-magnitude faults. When the sensed current exceeds the configured threshold, the trip unit sends a signal to open the contacts, interrupting the fault current.
Application Scenarios: Industrial power distribution panels, main incoming breakers for large commercial and industrial facilities, feeder protection in 600 V 3-phase systems, and any application requiring 1200 A of bolt-on circuit protection.
Installation Requirements:
- Requires a rating plug (e.g., SRPK1200A1200) to set the ampere rating
- Bolt-on front mounting into compatible Spectra Series enclosures
- Lugs must be separately procured and installed (not included)
- Install in accordance with UL/NEC requirements for 1200 A services
