Order now the 198E-AYTJ2, a high-precision current transformer from the Allen-Bradley 198E product line. This component is engineered for accurate current monitoring and energy management in industrial power distribution systems, providing a reliable scaled signal for meters and relays.
What Is the 198E-AYTJ2?
The 198E-AYTJ2 is a donut-style (toroidal) current transformer (CT) designed to step down high primary currents into a manageable secondary current, typically 5A, for use with measuring instruments and protection relays. As part of the Rockwell Automation energy monitoring suite, this CT is optimized for accuracy across a wide range of current frequencies. The unit features a robust resin-encapsulated design, protecting the internal copper windings from environmental factors such as dust, humidity, and vibration. Its 198E-AYTJ2 architecture is designed for easy installation over existing cables or busbars, facilitating retrofitting into established electrical panels without the need for extensive wiring overhauls.
Key Technical Specifications
- Primary Current Rating: Application specific (refer to datasheet for range)
- Secondary Current: 5A Standard
- Accuracy Class: 1.0 or better (at rated burden)
- Insulation Class: 0.6 kV, BIL 10 kV full wave
- Frequency: 50…400 Hz
- Enclosure: Molded thermoplastic / resin encapsulated
- Mounting: Surface mount or cable-tie
- Standard: UL recognized and CSA certified
System Integration and Energy Monitoring
The 198E-AYTJ2 is a foundational component for industrial IoT and smart manufacturing. By feeding accurate current data into power monitors like the PowerMonitor 5000 or 1000, it allows facility managers to track real-time power consumption, identify peak demand periods, and implement predictive maintenance based on motor load profiles. The CT’s high linearity ensures that even at the lower end of the current range, the measurements remain accurate enough for billing-grade energy audits and load-shedding algorithms.
Installation Advice
Safety is paramount when installing the 198E-AYTJ2: never leave the secondary terminals open-circuited while the primary current is flowing. This can cause dangerously high voltages to build up across the secondary leads. Always connect the secondary to a load (meter) or short-circuit the leads before energizing the primary circuit. Ensure the CT is oriented correctly according to the polarity marks (usually P1/H1 facing the source) to maintain correct phase relationship for power calculations.
Frequently Asked Questions
Q: What is the maximum burden rating for the 198E-AYTJ2?
A: The burden rating varies by specific configuration but is designed to support standard lengths of secondary wiring without degrading accuracy. Consult the technical manual for specific VA ratings.
Q: Can I use this CT for outdoor applications?
A: The 198E-AYTJ2 is primarily designed for indoor use within a protected enclosure. If used outdoors, it must be housed in a NEMA 3R or 4X rated panel to prevent moisture ingress.
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