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DM3TA1250 – SPLIT C/TRANSFORMER 1250/5A 80X120MM
Lovato DM3TA1250 split-core current transformer with 1250/5 A ratio, 80 x 120 mm opening, class 0.5 and class 1 accuracy for industrial current measurement.
£168.99
Why Choose the Lovato DM3TA1250 Split-Core Current Transformer?
The Lovato DM3TA1250 is a heavy-duty split-core current transformer designed for accurate current measurement in industrial switchboards, electrical distribution panels and energy-monitoring systems. Featuring a 1250/5 A transformation ratio, it converts a primary current of up to 1250 A into a standard 5 A secondary output for connection to compatible energy meters, ammeters, multifunction measuring instruments and power analysers.
Its split-core construction allows the transformer to be opened and installed around an existing cable or busbar without removing or rerouting the primary conductor. This makes the DM3TA1250 particularly suitable for retrofit metering projects, electrical upgrades and existing installations where downtime and installation work must be kept to a minimum.
With a large 80 × 120 mm internal opening, the DM3TA1250 accommodates substantial cables and busbars commonly found in high-current industrial power-distribution systems. Operating at 50-60 Hz, it provides a burden of 7.5 VA at accuracy class 0.5 and 15 VA at accuracy class 1, ensuring dependable performance in demanding applications.
Key Advantages
- Split-core construction enables installation around existing conductors.
- 1250/5 A transformation ratio for standard industrial metering equipment.
- Large 80 × 120 mm internal opening for high-current cables and busbars.
- Accuracy class 0.5 and class 1 options for reliable monitoring.
- Ideal for retrofit energy monitoring and sub-metering projects.
- Robust industrial construction for long service life.
Key Features
- Lovato DM3TA series split-core current transformer.
- 1250 A rated primary current.
- 5 A rated secondary current.
- 80 × 120 mm internal opening.
- 7.5 VA burden at accuracy class 0.5.
- 15 VA burden at accuracy class 1.
- 50-60 Hz operating frequency.
- 120% continuous overload withstand.
- 720 V rated insulation voltage.
- Screw terminals with screw fixing.
Reliable Current Measurement for Existing Installations
Current transformers safely convert high primary currents into proportional low-current outputs suitable for electrical measuring instruments. The Lovato DM3TA1250 converts currents up to 1250 A into a standard 5 A secondary output, allowing accurate monitoring without connecting measuring equipment directly to the power circuit.
The split-core construction is especially beneficial for retrofit installations. After safely isolating the electrical circuit, the transformer can be opened and installed around an existing conductor, significantly reducing installation time compared with conventional solid-core current transformers.
Typical Applications
- Industrial switchboards and power-distribution panels.
- Energy meters and multifunction measuring instruments.
- Power analysers and electrical monitoring systems.
- Building energy-management systems.
- Industrial automation and machinery panels.
- Commercial electrical distribution installations.
- Power quality monitoring.
- Retrofit metering and energy-efficiency projects.
Technical Specifications
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| Mounting Type | Panel / base | |
|---|---|---|
| Rated Primary Current (A) | 1250 A | |
| Secondary Current / Output | 5 A | |
| Rated Burden (VA) | 7.5 VA | |
| Device Type | Split-core CT | |
| Current | 5 A | |
| Manufacturer | Lovato Electric | |
| Series | DM3TA | |
| Model | DM3TA1250 | |
| Product type | Split-core current transformer | |
| Primary current | 1250 A | |
| Secondary current | 5 A | |
| Transformation ratio | 1250/5 A | |
| Internal opening | 80 × 120 mm | |
| Operating frequency | 50-60 Hz | |
| Burden at accuracy class 0.5 | 7.5 VA | |
| Burden at accuracy class 1 | 15 VA | |
| Continuous overload withstand | 120% of rated primary current | |
| Rated insulation voltage | 720 V | |
| Short-time thermal current | 40-60 × rated primary current for 1 second | |
| Rated dynamic current | 2.5 × Ith | |
| Insulation type | Dry, class E | |
| Terminal type | Screw | |
| Mounting method | Screw fixing | |
| Protection rating | IP30 | |
| Operating temperature | -25°C to +50°C | |
| Storage temperature | -40°C to +80°C | |
| Maximum relative humidity | 90% | |
| Approximate dimensions | 142 × 50 × 184 mm | |
| Product weight | approx. 1.25 kg | |
| Packaged weight | approx. 1.39 kg | |
| Package dimensions | 80 × 178 × 200 mm | |
| EAN | 8013975178782 | |
| HS Code | 85389091 |
Frequently Asked Questions
What is the Lovato DM3TA1250 used for?
The DM3TA1250 measures currents up to 1250 A and provides a standard 5 A secondary output for energy meters, power analysers and electrical measuring equipment.
Can the DM3TA1250 be installed without disconnecting the cable?
Yes. Its split-core design allows installation around an existing conductor after the electrical circuit has been safely isolated.
What size opening does the transformer provide?
The DM3TA1250 features a large 80 × 120 mm internal opening suitable for substantial cables and busbars.
What accuracy classes are available?
The transformer provides 7.5 VA at accuracy class 0.5 and 15 VA at accuracy class 1 depending on the connected measuring circuit.
Where is the DM3TA1250 typically used?
It is commonly installed in industrial switchboards, power-distribution systems, commercial buildings and energy-monitoring installations requiring retrofit current measurement.
Trusted Current Measurement from Lovato Electric
Lovato Electric current transformers are trusted by panel builders, electrical contractors and industrial engineers for dependable current measurement, straightforward installation and long-term reliability.
