Tense ATM-300 300/5A 30mm Measurement Current Transformer
The Tense ATM-300 is a professional grade, high capacity measurement current transformer (CT) designed to step down heavy primary alternating currents within commercial switchgear and industrial distribution networks. Featuring a standardized transformation ratio of 300/5A, this device effectively scales high line currents up to 300 A down to a safe, manageable 0–5 A secondary output. This proportional signal provides precise, real time data monitoring for digital power analyzers, ammeters, and automated energy management controllers. Outfitted with an optimized 30 mm rectangular/busbar window opening, it allows for flexible, drop in integration over solid copper conductors or heavy insulated cables.
Key Features
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High Capacity Current Scaling: Delivers a reliable 300/5A conversion ratio, enabling accurate monitoring of heavy load distributions across main electrical sub panels.
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30 mm Busbar Window: Engineered with a clean rectangular internal profile tailored for non invasive pass through mounting directly over power busbars or thick phase conductors.
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Hinged Safety Terminal Guards: Built with protective red flip top safety shields that completely isolate the secondary screw contacts (S1 and S2), safeguarding plant operators from accidental shock.
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Flame Retardant Polymer Casing: Enclosed in a compact, rugged, self extinguishing housing that provides high dielectric strength and absolute thermal stability under continuous peak currents.
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Integrated Panel Mounting System: Includes pre molded base brackets and retention slot paths to support secure horizontal or vertical anchoring inside dense electrical cabinets.
Technical Specifications
| Feature | Specification |
| Model / Series | ATM-300 |
| Brand / Manufacturer | Tense |
| Primary Rated Current (I pn) | 300 A |
| Secondary Rated Current (I sn) | 5 A |
| Transformation Ratio | 300/5A |
| Window Dimensions | 30 mm Width Profile (Rectangular type) |
| Terminal Protection | Dual red hinged safety terminal covers |
| Application Segment | Automation Parts / Electrical Protection and Control |
Applications
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Main Distribution Switchboards: Supplying vital step down telemetry lines to analog or digital master ammeters tracking building service panels.
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Industrial Sub Metering Matrices: Providing line current parameters to dedicated energy management meters evaluating individual manufacturing lines or high power equipment bays.
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Automatic Power Factor Correction (PFC): Feeding core real time current profiles to multi stage reactive power relays to optimize capacitor bank switching cycles.
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Motor Control Centers (MCC): Tracking continuous line currents on large industrial pump arrays, compressor systems, and ventilation fans.
