.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} Overview The UT281E+ uses a flexible coil instead of a rigid jaw, so it wraps around large or awkward conductors — busbars, cable bundles, tight gear — to measure AC current up to 9.99 kA. It's rated CAT III 1000 V / CAT IV 600 V and True-RMS, with inrush-current capture for motor and transformer start-up. A dual display shows two values at once, voltage and resistance round out the electrical set, and 999 result sets store on-board. The 1000 mm flexible coil and AA-battery power keep it practical for utility and industrial feeder work. It's backed by UNI-T's nearly 40 years of test-meter manufacturing. Key Features Flexible 1000 mm coil for large and awkward conductors AC current up to 9.99 kA (10 Hz–1000 Hz) True-RMS measurement Inrush-current capture for motor and transformer start-up AC/DC voltage to 1000 V; resistance to 60 MΩ; continuity Dual display; 999-set data storage CAT III 1000 V / CAT IV 600 V; AA battery power UT281E+ Details Flexible-Coil Current Measurement A flexible coil wraps around conductors a rigid clamp can't reach — large busbars, cable bundles, and crowded switchgear — and measures AC current up to 9.99 kA, opening up high-current work in tight or oversized installations. Inrush Capture & True-RMS Inrush-current capture records the surge when motors and transformers start, and True-RMS sensing keeps AC accurate on distorted waveforms across the 10 Hz–1000 Hz measurement band. Working Set & Storage A dual display shows two readings at once, AC/DC voltage to 1000 V and resistance round out the electrical measurements, and 999 result sets store on-board for later review. Compare the UT281 Series UT281E+ UT281F Max AC current 9.99 kA 10 kA Inrush current Yes — Power measurement — Active / apparent / reactive, PF, phase Connectivity — Bluetooth 5.0 Data storage 999 sets 1050 sets Jaw opening 1000 mm 1100 mm Applications High-current feeder and busbar measurement; motor and transformer start-up (inrush) testing; utility and industrial maintenance on large or awkward conductors; and switchgear work where a flexible coil reaches what a clamp cannot. Frequently Asked Questions Why a flexible coil instead of a clamp jaw? A flexible coil wraps around large busbars, cable bundles, and conductors in tight gear that a rigid jaw can't fit around. How much current can it measure? AC current up to 9.99 kA. How does it compare to the UT281F? The UT281E+ measures current with inrush capture; the UT281F adds active/apparent/reactive power, power factor, and Bluetooth. Specifications DC Voltage In 1000 V AC Voltage In 1000 V AC Current In 9.99 kA AC Current Frequency 10 Hz to 1000 Hz Frequency Range 10 Hz to 30 kHz Max Resistance 60 MΩ Inrush Current Yes True RMS Yes Continuity Yes Dual Display Yes Data Communication N/A Data Storage 999 sets CAT Rating CAT III 1000 V , CAT IV 600 V Jaw Opening 1000 mm Display Type Dual LCD Battery 3× AA Frequency Response 45 Hz to 500 Hz Documentation UT281E+ Datasheet UT281E+ User Manual
