Overview
General Electric 50-103021-PZXE1 AB-40 AC Voltmeter
The General Electric 50-103021-PZXE1 is a fixed panel-mount AC voltmeter from the GE AB-40 series, engineered for accurate voltage monitoring in industrial and utility power systems. This meter features a 150V full-scale rating with a 120:1 potential transformer (PT) ratio, enabling measurement of high voltages (0–18 kV) via external PT connection. Designed for 50–60 Hz operation, it delivers reliable performance in both industrial and utility applications where precision voltage measurement is essential.
Key Features
- 150V full-scale input rating with 120:1 PT step-down ratio for secure kV-level measurement
- Fixed dial face marked 0–750 AC volts at secondary (PT) output
- 50–60 Hz frequency range suitable for North American and international power systems
- Robust AB-40 panel-mount design with .92 kV peak circuit-to-ground isolation
- Approximately 960 gram weight; compact footprint ideal for switchboard installation
Technical Specifications
- Manufacturer: General Electric (Ross Hill Controls Corporation)
- Part Number: 50-103021-PZXE1
- Instrument Type: AB-40 Panel-Mount AC Voltmeter
- Input Rating: 150V AC full-scale
- PT Ratio: 120:1
- Secondary Dial Range: 0–750 AC volts
- Frequency: 50–60 Hz
- Dielectric Strength: .92 kV peak (circuit to ground)
- Weight: 960 grams
- Mounting: Fixed panel-mount
Typical Applications
- Industrial switchgear voltage monitoring and troubleshooting
- Utility substation and transformer panel metering
- Power distribution system commissioning and maintenance
- Portable test and measurement setups where external PT connection is available
- Retrofit or replacement in legacy systems using GE AB-40 instruments
Compatibility & Replacements
Compatible With
- GE AB-40 series panel-mount switchboard systems
- Standard 120:1 potential transformers (primary 10–12 kV / secondary 0–150V)
- Industrial and utility 50–60 Hz power systems
- Switchboards and control panels with standard rectangular cutout dimensions
Replaces / Drop-In Replacement For
- General Electric 50-103021-PZXE2 (similar AB-40 voltmeter with equivalent specs)
- Other GE 50-103021 variants with matching PT ratio and frequency rating
- Legacy panel voltmeters requiring 150V full-scale / 120:1 PT configuration
Works With
- Analog voltage measurement and monitoring in SCADA systems
- Traditional switchboard instruments (non-digital control environments)
- Integration with external PT/protection relay systems
- No software or programming required; passive analog instrument
