Voltage transformer Legrand 042787 — single unit for electrical installations

Legrand 042787 is a compact voltage transformer supplied as a single unit for integration into electrical installations. Designed to provide reliable voltage transformation for control circuits, metering and protection devices, this transformer fits standard electrical panels and Legrand-compatible systems. The device is intended for installation by qualified electricians and technicians who require a compact transformer that supports accurate secondary voltage for downstream devices.

Advantages

The transformer offers a compact form factor that saves panel space and simplifies installation in confined cabinets. It delivers stable voltage transformation with minimal maintenance requirements and is built to integrate with Legrand electrical components. As a single-unit supply, it reduces the need to match multiple pieces and streamlines procurement for specific projects.

Suitable for

• Control circuits in industrial and commercial electrical panels
• Auxiliary supply for metering equipment and protection relays
• Retrofit or new installations where a compact transformer is required

Key specifications

• Function: single-phase voltage transformation for control and auxiliary circuits
• Form factor: compact unit suitable for panel mounting
• Compatibility: designed for integration with standard Legrand systems and electrical enclosures
• Use environment: indoor electrical installations within control cabinets and distribution panels
• Maintenance: low-maintenance design intended for professional installation

How to use

Install the transformer into the panel following local electrical codes and wiring diagrams. Connect primary and secondary terminals according to the required input and output voltages for the control or metering device. Ensure correct mounting and secure terminal connections, then verify voltage output with appropriate testing equipment before energizing the downstream circuit. Only qualified personnel should handle installation, testing and commissioning.

Usage recommendations

Verify the required primary and secondary voltages and confirm compatibility with the target devices before installation. Use proper overcurrent protection on the primary side and follow device mounting orientation and ventilation requirements to ensure safe and reliable operation.