Overview
The Instrument Transformer 0721A11460 is a precision current transformer (CT) engineered for safe, accurate measurement of high currents in electrical distribution systems. With a 3500:5 A transformation ratio and 600V rated primary voltage, this CT reduces dangerous high currents to standardized 5 A secondary output, making it suitable for metering, monitoring, and protective relay applications across industrial, commercial, and utility-scale installations.
Key Features
- 3500:5 A Transformation Ratio — scales high primary currents down to safe 5 A secondary for instruments and relays
- 600V Rated Primary Voltage — suitable for standard low-voltage and medium-voltage power circuits
- 50–400 Hz Operating Range — compatible with global AC power standards and variable-frequency drives
- High Measurement Accuracy — meets standard accuracy classes for revenue metering and protective applications
- Isolation & Safety — isolates secondary measuring instruments and control circuits from primary high-current circuits
Technical Specifications
- Primary Current Rating: 3500 A
- Secondary Current Rating: 5 A
- Transformation Ratio: 3500:5
- Primary Voltage Rating: 600 V AC
- Frequency Range: 50–400 Hz
- Part Number: 0721A11460
- Manufacturer: Instrument Transformer
Typical Applications
The 0721A11460 is commonly deployed in:
- Electrical Substations & Power Distribution: metering and monitoring of distribution circuit currents
- Industrial Plant Protection: input to overcurrent relays and protective relay schemes
- Revenue Metering: utility-grade current input for energy meters and power analyzers
- Control Systems: current feedback for load monitoring, demand-side management, and load-shedding logic
- Motor Control Centers (MCCs): coordination with protective relays and breaker trip units
Compatibility & Replacements
Compatible With
- Standard 5 A secondary metering instruments and analog meters
- Protective relays (electromechanical and digital)
- Power analyzers and energy monitoring systems
- Power quality and harmonic analysis equipment
- AC power distribution circuits rated up to 600 V
- Frequency-variable systems within 50–400 Hz range
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or equipment manufacturer before ordering. Other Instrument Transformer models with identical 3500:5 ratio and 600 V primary rating may be substitute-compatible; consult the original equipment documentation or contact the OEM.
Works With
- ANSI/IEEE standard metering and protective relay schemes
- IEC 61869 compliant instrumentation and controls
- AC/DC analog and digital data acquisition systems
- Power monitoring and SCADA software platforms
- Microprocessor-based protective relays (numerical relays)
