Product Overview
Fluke Y8101 Clamp-On AC Current Transformer, 1/1000 Ratio, with Banana Lead Set
Condition
Used, clean, and in very good condition. Minor cosmetic wear. Tested for basic continuity. The photographs show the actual unit: a black molded plier-style clamp with light scuffing and fine surface scratches across the housing, a ribbed thumb grip panel on the top face, and a molded white-on-black rating label that is fully legible in the close-up. The split core jaw is pictured both open and closed, with red insulated pockets around the core faces; one core face is bright, the opposite lamination stack shows light tan surface oxidation of the kind exposed silicon steel picks up on a shelf. The brass pivot screw carries an olive paint witness mark. Two banana jacks sit in the base of the handle, and a cable-tied twin lead terminated in one red and one black banana plug at each end is included. Nothing else is pictured or included: no box, no manual, no meter.
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Product Overview
The Fluke Y8101 is a clamp-on AC current transformer that lets an ordinary AC current meter read line current without breaking the circuit. The molded label on this unit reads FLUKE Y8101 AC CURRENT TRANSFORMER, RATIO 1/1000, with INPUT RANGE 2-150A, MAX PRIMARY CURRENT 150A AC, WORKING VOLTAGE 300V AC MAX, and OUTPUT MAX OUTPUT CURRENT 150mA AC, MAX VOLTAGE FROM OUTPUT TERMINALS TO GROUND 30V AC. A 1/1000 ratio means the secondary passes one milliamp for every amp flowing through the clamped conductor, so a meter on its AC milliamp range reads primary current directly by scale factor. Construction is a laminated split core in a black molded scissor body, with two banana jacks in the base of the handle and a separate double-ended red and black banana lead set for the meter connection. It is an accessory transformer rather than a self-contained clamp meter: the clamp senses, the meter reads.
Key Features
- Model: Fluke Y8101 AC current transformer
- Ratio: 1/1000 per the molded label
- Label input range: 2-150A (readable in the close-up photo)
- Label max primary current: 150A AC
- Label working voltage: 300V AC max
- Label max output current: 150mA AC
- Label max voltage from output terminals to ground: 30V AC
- Clamp-on split laminated core: no need to break the circuit under test
- Two banana jacks in the handle base; double-ended red and black banana lead set included
- Black molded housing with ribbed thumb grip and red insulated jaw pockets
Applications
- Electrician reading branch circuit or motor feeder current at a panel without pulling conductors loose
- Bench technician giving an older analog or digital multimeter a clamp-on front end for AC current work
- HVAC service tech checking compressor and blower draw at the contactor during a startup call
- Collector or restorer completing a period Fluke test set with the matching current transformer accessory
Frequently Asked Questions
What exactly does the label on this unit say?
Word for word, in three blocks: INPUT, RANGE 2-150A, MAX PRIMARY CURRENT 150A AC, WORKING VOLTAGE 300V AC MAX. Then FLUKE, Y8101, AC CURRENT TRANSFORMER, RATIO 1/1000. Then OUTPUT, MAX OUTPUT CURRENT 150mA AC, MAX VOLTAGE FROM OUTPUT TERMINALS TO GROUND 30V AC. The close-up photo shows all of it, so you can read the nameplate yourself before you buy.
How do I turn its output into an amp reading?
The label ratio is 1/1000, so output current is one thousandth of the current through the clamped conductor: 100A in the jaw gives 100mA out. Set your meter to AC milliamps, take the reading, multiply by 1000. Confirm the arrangement against your meter documentation before you rely on it.
Are the test leads included, or is that just a photo prop?
Included. The lead set in the photos ships with the clamp: a cable-tied twin lead with one red and one black banana plug at each end, matching the two banana jacks in the base of the handle. No box, manual, or meter comes with it.
Has it been tested or calibrated?
Tested for basic continuity only. No accuracy, phase, burden, hipot, or mechanical testing was performed here, and there is no calibration certificate. If your work needs traceable accuracy, verify it against a known current source before you trust a number off it.
Why buy this one unit from us instead of hunting a mixed instrument lot?
We list one piece at a time, the exact unit in these photographs, so you buy what you need instead of paying for a lot of ten to get the one. Shipping is $8 flat rate and free over $28, which usually puts a single item well under the cost of a forced-quantity bundle. Same or next business day shipping from Idaho.
Before clamp jaws were built into every meter, this is the piece you hung on the line to get the reading: a thousand to one, honestly kept. Clip it around a conductor, point your meter at the milliamp scale, and let the current tell on itself.
