Overview
The Instrument Transformers 350-301 is a precision current transformer (CT) designed for industrial metering and relaying applications. This window-type, single-phase CT provides accurate current transformation at a 300:5A ratio with robust 600V, 10 kV BIL insulation. Operating across 50–400 Hz, the 350-301 serves as a drop-in solution for legacy electrical systems requiring secondary metering circuits in panel boards, control panels, and generator monitoring applications.
Key Features
- Current ratio: 300:5A with high accuracy for metering-class applications
- Single-phase, window-type design for easy installation around primary conductors
- 600V insulation with 10 kV BIL (Basic Impulse Level) protection
- Wide frequency range: 50–400 Hz for global industrial use
- Compact, lightweight construction (2.90 lbs) suitable for retrofit installations
- UL and CSA recognized; meets IEEE C57.13 standards
Technical Specifications
- Manufacturer: Instrument Transformers Inc.
- Part Number: 350-301
- Transformer Type: Current Transformer (CT), Window Type
- Current Ratio: 300:5A
- Insulation Voltage: 600V (10 kV BIL)
- Frequency Range: 50–400 Hz
- Phase Configuration: Single Phase
- Weight: 2.90 lbs
- Application Class: Metering and Relaying
- Status: Discontinued by Manufacturer
- Certifications: UL recognized, CSA approved, IEEE C57.13 compliant
Typical Applications
The Instrument Transformers 350-301 is well-suited for:
- Panel board and control panel metering circuits
- Electric motor monitoring and protection systems
- Generator and engine control applications
- Legacy distribution switchgear retrofit and upgrades
- Industrial facility load monitoring and demand measurement
- Ammeter and power analyzer secondary connections
Compatibility & Replacements
Compatible With
- Industrial metering panels rated 600V and below
- Panel-mounted ammeters and analog meters
- Programmable logic controllers (PLCs) with analog input modules
- Power analyzers and energy management systems
- Electrical protection relays and monitoring devices
Replaces / Drop-In Replacement For
- GE ITI 350-301 (equivalent legacy designation)
- Older Instrument Transformers window-type CTs with 300:5A ratio
- Verify compatibility with your system integrator before ordering for exact model matching.
Works With
- Standard 600V panel board architectures
- Industrial automation and measurement systems
- SCADA and real-time monitoring platforms requiring analog metering inputs
- Legacy three-phase power systems (single-phase CT for individual phase measurement)
