Description
Manufacturer: General Electric (GE / ABB Spectra RMS) Part Number: SGLA36AT0400 This is a 3-pole, 400A SG600 frame molded case circuit breaker (MCCB) belonging to the GE Spectra RMS product family. It adopts solid-state RMS electronic trip unit and current-limiting design, widely used for low-voltage power distribution protection in industrial plants, power station auxiliary systems and large commercial buildings. This model is obsolete, mainly supplied as surplus and refurbished spare parts for legacy system maintenance.
Technical Specifications
| Item | Parameter |
|---|---|
| Rated Continuous Current | 400A |
| Pole Count | 3P |
| Max Rated Voltage | 600VAC, 50/60Hz |
| Short-Circuit Interrupt Rating | 100kA @240VAC; 65kA @480VAC / 600VAC |
| Trip Unit | Electronic RMS LSI (Long-time / Short-time / Instantaneous) |
| Rating Plug | SRPG400A (interchangeable front mount rating plug) |
| Mounting Method | Bolt-on |
| Terminal | Lug type, lugs sold separately (Model TCLK365) |
| Wire Range | 8AWG ~ 600kcmil Cu/Al |
| Frame Size | SG600 |
| Certification | UL489, CSA |
| Ambient Temperature | -20°C ~ +60°C |
| Feature | Reverse feed capable, 100% rated, HACR rated |
Key Features
- True RMS digital current sampling, stable protection under distorted non-sinusoidal load waveforms
- Interchangeable front rating plug, convenient field modification of rated current without breaker disassembly
- LSI three-stage adjustable protection curve for overload, selective short-time and instantaneous short-circuit fault
- Current-limiting contact structure to reduce arc flash energy and equipment damage under short circuit
- Reverse feed capability, applicable for dual power supply and multi-source distribution layouts
- 100% continuous rated, suitable for heavy continuous loads including HVAC systems
- Robust double-break contact mechanism to improve fault interruption reliability
Application Scenarios
- Main feeder and branch circuit protection for industrial low-voltage switchboards
- Motor control center (MCC) power inlet protection
- Power plant auxiliary power distribution panels
- Retrofit, upgrade and spare replacement of legacy GE Spectra systems
- Large commercial building power distribution systems
Installation & Maintenance Notes
- Install inside metal control enclosure; strictly follow specified torque value when tightening lugs.
- Verify rating plug and trip parameter setting match load requirements before energizing.
- Execute lockout/tagout procedure and cut off upstream power before removing or servicing breaker.
- Regular inspection for terminal overheating signs, contact erosion and dust accumulation.
- Original GE Spectra SG series discontinued; verify mounting dimension, rack footprint and protection coordination before replacement.
FAQ
Q: What does LSI trip stand for? A: LSI includes long-time overload protection, adjustable short-time delay for selectivity, instantaneous trip for severe short-circuit faults.
Q: Are terminal lugs included with SGLA36AT0400? A: No, lugs are sold separately, the matching lug part number is TCLK365.
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