Why Choose the Lovato DM0T0040 Current Transformer?
The Lovato DM0T0040 is a compact solid-core current transformer designed to convert a primary current of 40 A into a standard 5 A secondary output for use with compatible electrical measuring instruments, energy meters and power analysers. Its through-hole construction accommodates a primary conductor up to Ø22 mm, making it suitable for current measurement in industrial and commercial electrical distribution systems.
Operating across a frequency range of 50–60 Hz, the DM0T0040 provides an accuracy burden of 1.25 VA at Class 3 and withstands continuous overload up to 120% of its rated primary current. The transformer has a rated insulation voltage of 720 V and Class E dry insulation for dependable operation in electrical switchboards and control panels.
Installation is flexible thanks to support for both DIN rail and screw fixing, while screw terminals provide a practical secondary connection. With IP30 protection and compliance with IEC/EN/BS 61869-1 and IEC/EN/BS 61869-2, the DM0T0040 provides a straightforward solution for integrating 40/5 A current measurement into metering and energy-monitoring systems.
Key Advantages
- 40/5 A transformation ratio for connection to compatible 5 A measuring instruments.
- Solid-core through-hole construction provides a simple and robust current-measurement solution.
- Accepts primary conductors up to Ø22 mm.
- 1.25 VA Class 3 burden for measurement applications.
- Supports 120% continuous overload of rated primary current.
- Flexible DIN rail or screw mounting.
- Screw-terminal secondary connection simplifies panel wiring.
- Complies with IEC/EN/BS 61869-1 and IEC/EN/BS 61869-2.
Key Features
- Lovato DM0T series current transformer.
- Solid-core current transformer design.
- 40 A primary rated current.
- 5 A secondary output current.
- Ø22 mm cable aperture.
- 50–60 Hz operating frequency.
- 1.25 VA burden at Class 3.
- 720 V rated insulation voltage.
- Class E dry insulation.
- IP30 protection rating.
- Screw terminals for the secondary circuit.
- DIN rail or screw fixing.
Reliable 40/5 A Current Measurement for Electrical Monitoring
A current transformer reduces the primary current flowing through an electrical conductor to a proportional secondary current that can be safely measured by compatible instrumentation. The Lovato DM0T0040 converts a nominal 40 A primary current to a standard 5 A secondary signal, enabling connection to suitable ammeters, multifunction meters, power analysers and energy-monitoring equipment.
Its solid-core design requires the primary conductor to pass through the Ø22 mm aperture, making it particularly suitable for new switchboard construction and installations where the conductor can be disconnected during fitting. DIN rail or screw fixing allows the transformer to be integrated conveniently into a wide variety of electrical panel layouts.
Typical Applications
- Electrical switchboards and distribution panels.
- Industrial current measurement systems.
- Digital ammeter installations.
- Power analyser current inputs.
- Energy and consumption monitoring systems.
- Building energy-management systems.
- Machine and production equipment monitoring.
- Industrial automation control panels.
- Commercial electrical distribution systems.
