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DM25T400 Lovato CURRENT TRANSFORMER 400/5A D24MM, 33×11
Lovato DM25T400 is a 400/5 A solid-core current transformer for Ø24 mm cables and compatible busbars, providing Class 0.5 accuracy at 10 VA for electrical metering and monitoring applications.
£51.96
Why Choose the Lovato DM25T400 Current Transformer?
The Lovato DM25T400 is a compact solid-core current transformer designed to convert a primary current of 400 A into a standard 5 A secondary current for connection to compatible meters, power analysers and protection equipment. It is suitable for use with both insulated conductors and busbars in industrial and commercial electrical installations.
The transformer accommodates cables up to Ø24 mm and busbars measuring 11 × 24 mm, 20 × 15 mm or 33 × 11 mm, providing flexibility for a range of panel layouts. Its measurement performance supports Class 0.5 at 10 VA and Class 1 at 12 VA, making it suitable for accurate current monitoring and energy-management applications.
With 720 V rated insulation voltage, 50/60 Hz operation and a robust IP20 construction, the DM25T400 is engineered for dependable service in electrical panels. It can be mounted on a DIN rail or secured by screws, allowing straightforward integration into new or existing switchgear assemblies.
Key Advantages
- Converts 400 A primary current to a standard 5 A secondary output.
- Supports both Ø24 mm cables and multiple busbar sizes.
- Class 0.5 accuracy at 10 VA for precise current measurement.
- Class 1 accuracy at 12 VA for broader metering applications.
- DIN rail or screw mounting provides flexible panel installation.
- Designed for reliable operation in industrial and commercial electrical systems.
Key Features
- Lovato DM25T current transformer series.
- 400/5 A transformation ratio.
- 50–60 Hz operating frequency.
- Ø24 mm cable aperture.
- Suitable for 11 × 24 mm, 20 × 15 mm and 33 × 11 mm busbars.
- 720 V IEC/EN rated insulation voltage.
- Class E insulation.
- Screw terminal connections.
- DIN rail or screw fixing.
- IP20 degree of protection.
Accurate Current Measurement for Energy Monitoring Systems
Current transformers such as the Lovato DM25T400 provide electrical meters and analysers with a proportional low-current signal derived from a much higher primary current. By converting up to 400 A on the primary conductor to a standard 5 A secondary signal, the transformer allows compatible monitoring equipment to measure current safely and accurately without carrying the full load current through the instrument itself.
The DM25T400 is particularly suited to switchboards and distribution systems where compact conductor and busbar arrangements are used. Its solid-core design, multiple mounting options and defined accuracy classes make it suitable for energy monitoring, electrical measurement and power-management applications in commercial and industrial installations.
Typical Applications
- Energy meters and multifunction power analysers.
- Industrial switchboards and distribution panels.
- Electrical load monitoring systems.
- Power and energy management installations.
- Commercial building electrical distribution.
- OEM control panels and machinery.
Technical Specifications
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| Mounting Type | DIN rail, Panel / base | |
|---|---|---|
| Rated Primary Current (A) | 400 A | |
| Secondary Current / Output | 5 A | |
| Aperture (mm) | 24 mm | |
| Rated Burden (VA) | 10 VA | |
| Device Type | Solid-core CT | |
| IP Rating | IP20 | |
| HS Code | 85043180 | |
| Manufacturer | Lovato Electric | |
| Series | DM25T | |
| Model | DM25T400 | |
| Product type | Solid-core current transformer | |
| Primary current | 400 A | |
| Secondary current | 5 A | |
| Transformation ratio | 400/5 A | |
| Operating frequency | 50–60 Hz | |
| Accuracy Class 0.5 burden | 10 VA | |
| Accuracy Class 1 burden | 12 VA | |
| Rated insulation voltage Ui | 720 V | |
| Rated short-time thermal current Ith | 40–60 × Ipn for 1 s | |
| Rated dynamic current Idyn | 2.5 × Ith | |
| Insulation class | Class E | |
| Cable aperture | Ø24 mm | |
| Compatible busbars | 11 × 24 mm, 20 × 15 mm, 33 × 11 mm | |
| Terminal type | Screw | |
| Mounting | DIN rail or screw fixing | |
| Degree of protection | IP20 | |
| Operating temperature | -25 to +50 °C | |
| Storage temperature | -40 to +80 °C | |
| Relative humidity | Up to 90% | |
| Product weight | 307 g | |
| Standards | IEC/EN 61869-1 and IEC/EN 61869-2 |
Frequently Asked Questions
What is the transformation ratio of the Lovato DM25T400?
The DM25T400 has a transformation ratio of 400/5 A, converting a 400 A primary current into a 5 A secondary current for compatible measuring equipment.
What cable size can pass through the Lovato DM25T400?
The DM25T400 is designed for insulated conductors with a maximum diameter of 24 mm.
Which busbar sizes are compatible with the DM25T400?
The transformer can accommodate busbars measuring 11 × 24 mm, 20 × 15 mm or 33 × 11 mm.
What accuracy does the Lovato DM25T400 provide?
The DM25T400 provides Class 0.5 accuracy at 10 VA and Class 1 accuracy at 12 VA.
How is the Lovato DM25T400 mounted?
The DM25T400 can be installed on a DIN rail or fixed using screws, providing flexible integration into electrical panels and switchboards.
Trusted by Electrical and Energy Professionals Worldwide
Lovato Electric current transformers provide panel builders, electrical engineers and energy-management professionals with reliable and accurate current measurement solutions for metering, monitoring and power-management systems.
