Lovato DM0TW0020 is a 20/5 A wound primary current transformer with a 5 A secondary output, 50-60 Hz operating frequency and Class 0.5 and Class 1 measurement performance for electrical metering and monitoring applications.
£40.04
The Lovato DM0TW0020 is a wound primary current transformer designed for accurate current measurement in low-current electrical circuits. With a primary current rating of 20 A and a standard 5 A secondary output, it provides a 20/5 A transformation ratio for compatible ammeters, energy meters, power analysers and electrical monitoring equipment.
Unlike conventional through-hole current transformers, the DM0TW0020 incorporates a wound primary, making it particularly suitable for applications with relatively low primary currents. It provides measurement performance of 1.5 VA at Class 0.5 and 2.5 VA at Class 1, supporting dependable current measurement in industrial and commercial installations.
The DM0TW0020 operates at 50–60 Hz, supports a continuous overload of 120% of its rated primary current and features screw terminals for secure electrical connections. DIN rail or screw fixing provides flexible installation inside switchboards, distribution panels and electrical control equipment.
A current transformer converts the current flowing in a primary electrical circuit into a proportional secondary current suitable for compatible measuring instruments. With the DM0TW0020, a rated primary current of 20 A corresponds to a 5 A secondary output, allowing connected instrumentation to measure and monitor the primary circuit without carrying the full primary current through the measuring device.
Wound primary current transformers are particularly useful for relatively low-current circuits because the primary winding is incorporated into the transformer itself. The Lovato DM0TW0020 combines this construction with Class 0.5 and Class 1 measurement performance, screw terminals and flexible DIN rail or screw mounting, making it suitable for metering, power analysis and energy-monitoring installations.
| Manufacturer | Lovato Electric |
|---|---|
| Family | Current Transformers |
| Series | DM0TW |
| Model | DM0TW0020 |
| Product type | Current transformer |
| CT type | Wound primary |
| Primary current Ipn | 20 A |
| Secondary output current | 5 A |
| Transformation ratio | 20/5 A |
| Operating frequency | 50–60 Hz |
| Overload withstand | 120% Ipn |
| Class 0.5 burden | 1.5 VA |
| Class 1 burden | 2.5 VA |
| Rated short-time thermal current Ith | 40 × Ipn for 1 s |
| Rated dynamic current Idyn | 2.5 × Ith |
| Insulation | Class E dry type |
| Terminal type | Screw |
| Fixing | DIN rail or screw |
| Protection rating | IP30 |
| Operating temperature | -25 to +50 °C |
| Storage temperature | -40 to +80 °C |
| Relative humidity | 90% |
| Weight | 279 g |
| Compliance | IEC/EN/BS 61869-1, IEC/EN/BS 61869-2 |
| Certifications | CE, UKCA, EAC |
| EAN | 8013975300558 |
| HS code | 85043180 |
The DM0TW0020 is a wound primary current transformer used to convert a rated primary current of 20 A into a standard 5 A secondary current for compatible electrical measuring and monitoring equipment.
The DM0TW0020 has a transformation ratio of 20/5 A, meaning its rated primary current is 20 A and its secondary output current is 5 A.
The DM0TW0020 provides a burden of 1.5 VA at Class 0.5 and 2.5 VA at Class 1.
The DM0TW0020 can be mounted on a DIN rail or fixed using screws, providing installation flexibility inside switchboards and electrical panels.
The DM0TW0020 can be used with compatible energy meters, power analysers, ammeters and other electrical measuring equipment designed to accept a 5 A current transformer secondary input.
Lovato Electric current transformers provide dependable current transformation for industrial and commercial electrical measurement systems, with the DM0TW wound primary range offering accurate low-current measurement, standard 5 A secondary outputs and flexible panel installation.
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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...