Overview
The General Electric AB-40 50-103131-LSZZ2 is a legacy AC ammeter panel meter designed for industrial and utility power monitoring applications. Built to GE’s proven standards, this analog meter provides reliable current measurement in AC electrical systems. The AB-40 series is widely found in manufacturing, utilities, and control panel installations where direct current indication is required.
Key Features
- Type AB-40 analog panel meter construction
- AC ammeter with 5A full-scale rating
- 400:1 current transformer ratio for high-current sensing
- 60-cycle (40–70 Hz) compatible
- Compact 4.5″ × 4.5″ × 4.5″ case dimensions
- Made in USA by General Electric
- Tested and functional used unit
Technical Specifications
| Manufacturer | General Electric |
| Part Number | 50-103131-LSZZ2 |
| Type/Series | AB-40 |
| Meter Function | AC Ammeter |
| Full-Scale Range | 0–5 A |
| CT Ratio | 400:1 |
| Frequency Rating | 40–70 Hz |
| Case Dimensions | 4.5″ × 4.5″ × 4.5″ |
| Weight | Approximately 2 lbs |
| Origin | Made in USA |
| Condition | Used, Tested & Functional |
Typical Applications
The General Electric AB-40 ammeter is commonly used in:
- Industrial control panels and switchboards
- Motor starter and soft-starter monitoring
- Utility power distribution and load monitoring
- Machine tool and equipment control systems
- AC current indication in legacy electrical installations
Compatibility & Replacements
Compatible With
- Standard AC electrical systems rated 40–70 Hz
- Current transformer (CT) secondary circuits with 400:1 ratio compatibility
- Industrial control systems requiring analog current indication
- Panel cutout mounting configurations (standard 4.5″ square opening)
Replaces / Drop-In Replacement For
Similar GE AB-40 ammeter units with equivalent ratings and configurations. Verify specific model number compatibility with your system integrator before ordering. Common comparable models in the AB-40 series include 50-103131-LSTM2 and other 5A ammeter variants.
Works With
- AC power systems (single-phase and three-phase)
- Standard current transformer secondary loops
- Industrial relay and control circuits
- Legacy analog instrumentation panels
