NK ATR4-420-24L-FD AC Current Operated Switch, AT/ATR-FD Series

• AT/ATR-FD series
• AC current transducer
• Output type = True RMS
• Range = 0 - 400 A
• Output = 4-20 mA
• Power supply = 24 VDC loop-powered
• Case Style = solid-core, top terminals, DIN rail or panel mounting

AT/ATR-FD Series AC Current Transducers provide a current sensor and analog output signal conditioning in a single package. The large, easy-to-install solid-core design allows for quick installation even in applications where there are multiple conductors per phase. Just thread the conductor through the extra large aperture and reconnect on the other side. The transducer output is powered from excitation voltage of around 24 VDC, using just two wires. The sensor mounts on a back panel or a DIN rail, and is designed to accommodate wire sizes for loads up to 400 A.

Shredders

Monitor a shredding operation to measure current usage, enabling automatic shut down if the blades become jammed or overloaded.

AC Current Transducer Applications

Monitor Large Machines

• Detect over or undercurrent conditions before they cause breakdowns or interlock one process with another.

Water Delivery and Treatment

• Detect open discharge lines.
• Sense clogged filters or blocked intake to pumps.
• Measure increased current to show failing bearings or pump impeller cavitation.

Generators

• Shed non-critical loads when demand reaches a set level.

AC Current Transducer Features

4–20 mA Analog Signal Proportional to AC Current

• Both average responding and True RMS models available.
• Compatible with most automation and control systems.

2-Wire Loop Powered

• Simple and reliable connection.

Factory Calibrated with Five Year Warranty

• Choice of three ranges : 0–200, 300 or 400 A.
• Designed for longest life and reliability.

Solid-core Case

• Sensing window provides ample space for a bus bar, a single conductor or multiple conductors.

DIN Rail or Panel Mount

• Simply snap onto DIN rail* or attach with screws to a panel for secure mounting.

UL/cUL and CE Approved

• Accepted worldwide.

AC Current Transducer Connections

Loop Power Requirement

AC Current Transducer Ordering Information

Sample Model Number: ATR2-420-24L-FD

AC True RMS current transducer, 0-200 A range, 4-20 mA output, 24 VDC loop-powered, solid-core case, DIN rail mounting.