Lovato DM2TMA0300 is a compact pre-wired split-core 300/5 A current transformer with a 36 x 36 mm aperture designed for electrical metering, energy monitoring and retrofit current measurement applications.
£134.73
The Lovato DM2TMA0300 is a compact, pre-wired split-core current transformer designed for accurate current measurement in electrical distribution, energy monitoring and industrial metering systems. As part of the Lovato DM2TMA current transformer series, it provides a 300/5 A transformation ratio, converting a primary current of 300 A into a standard 5 A secondary signal for compatible measuring instruments.
Its split-core construction enables the transformer to be opened and installed around an existing conductor without disconnecting the primary cable or busbar. The 36 × 36 mm aperture provides generous conductor clearance, making the DM2TMA0300 particularly suitable for retrofit energy monitoring, switchboard upgrades and industrial electrical installations.
The transformer operates across 50–60 Hz and offers measurement performance of 0.5 VA at class 0.5 and 1.5 VA at class 1. A 2 m pre-wired secondary connection, 720 V rated insulation voltage and robust compact housing simplify integration with compatible energy meters, ammeters and power analysers.
Current transformers reduce high primary currents to a proportional secondary current that can be measured safely by compatible electrical instrumentation. The Lovato DM2TMA0300 converts a 300 A primary current into a standard 5 A secondary signal, enabling integration with energy meters, ammeters, multifunction meters and power-monitoring equipment.
The split-core design is particularly advantageous when adding measurement equipment to an existing electrical installation. The transformer can be opened and positioned around a suitable conductor without dismantling the primary circuit, while its 36 × 36 mm aperture and pre-wired secondary connection help reduce installation time in switchboards, distribution panels and energy-management systems.
| HS Code | 85043180 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | DM2TMA Current Transformers |
| Model | DM2TMA0300 |
| Product type | Compact pre-wired split-core current transformer |
| Primary current | 300 A |
| Secondary current | 5 A |
| Transformation ratio | 300/5 A |
| Operational frequency | 50–60 Hz |
| Burden at class 0.5 | 0.5 VA |
| Burden at class 1 | 1.5 VA |
| Continuous overload withstand | 120% Ipn |
| Rated insulation voltage | 720 V |
| Insulation | Dry type, Class E |
| Conductor aperture | 36 × 36 mm |
| Connection | 2 m pre-wired cable |
| Dimensions (W × H × D) | approx. 57.5 × 86 × 42 mm |
| Weight | approx. 380 g |
| Operating temperature | -25 to +50 °C |
| Storage temperature | -40 to +80 °C |
| Maximum relative humidity | 90% |
| Standards | IEC/EN/BS 61869-1, IEC/EN/BS 61869-2 |
The DM2TMA0300 is a split-core current transformer used to measure AC current in electrical distribution, energy metering and industrial power-monitoring systems.
The transformer has a 300/5 A ratio, converting a rated primary current of 300 A into a standard 5 A secondary current.
The DM2TMA0300 has a 36 × 36 mm aperture for installation around suitable cables and busbar conductors.
Yes. Its split-core construction allows the transformer to be opened and installed around an existing conductor without removing the primary cable or busbar.
The transformer is supplied with a 2 m pre-wired secondary connection and provides a 5 A secondary signal for compatible energy meters, ammeters and power analysers.
Lovato Electric current transformers provide dependable current measurement for electrical distribution, energy management and industrial monitoring systems, with the DM2TMA range combining convenient split-core installation with reliable metering performance.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...