Why Choose the Lovato DM0TW0020 20/5 A Wound Primary Current Transformer?
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.
Key Advantages
- 20/5 A transformation ratio for low-current measurement applications.
- Wound primary construction specifically designed for lower primary current ratings.
- Standard 5 A secondary output for compatibility with common electrical measuring equipment.
- Class 0.5 performance at 1.5 VA for accurate metering applications.
- Class 1 performance at 2.5 VA.
- Supports 120% continuous overload of rated primary current.
- Flexible DIN rail or screw mounting.
- Complies with IEC/EN/BS 61869-1 and IEC/EN/BS 61869-2.
Key Features
- Lovato DM0TW wound primary current transformer.
- 20 A primary current.
- 5 A secondary current.
- 50–60 Hz operating frequency.
- 1.5 VA burden at Class 0.5.
- 2.5 VA burden at Class 1.
- 120% rated-current overload withstand.
- Class E dry insulation.
- Screw terminals for secure connections.
- DIN rail or screw mounting.
- IP30 protection rating.
- CE, UKCA and EAC certified.
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.
Typical Applications
- Low-current electrical measurement.
- Energy meter current inputs.
- Power analyser installations.
- Panel-mounted ammeters and measuring instruments.
- Industrial switchboards and distribution panels.
- Commercial building energy monitoring.
- Machine and equipment current monitoring.
- Electrical load and consumption analysis.
