VT56A

Overview

The Hammond Manufacturing VT56A is an industrial potential transformer designed for instrument applications. It features a single primary winding rated at 347 VAC and a single secondary winding rated at 120 VAC, providing a transformation ratio of 347:120. The unit has a power rating of 8 VA and utilizes screw-type terminals for connection. Physically, it measures 82.55 mm in length, 76.2 mm in width, and 63.5 mm in height, with a weight of 1.066 kg. The transformer is constructed for chassis mounting and belongs to the EX-HX-VT series.

Feature Summary

• Designed as a potential transformer for precise voltage measurement in industrial control circuits
• Features a robust construction suitable for machine tool environments
• Provides electrical isolation between primary and secondary windings

Applications

• Voltage measurement in 240, 480, or 600 VAC systems when used with appropriate voltmeters
• Industrial machine tool control circuits
• Instrumentation requiring step-down from medium voltage to standard metering levels

Procurement Notes

Verify that the specific order matches the Hammond Manufacturing part number VT56A and confirms the 347V primary to 120V secondary ratio. Ensure the application requires an 8 VA rating and chassis mount style. Confirm compliance with RoHS directives if required by the project specifications before finalizing the purchase.

Selection Notes

Select this component when a dedicated potential transformer is needed for stepping down 347VAC to 120VAC for instrumentation purposes. It is suitable for chassis installation where space allows for dimensions of approximately 82.55 mm x 76.2 mm x 63.5 mm. Consider the 8 VA power limit and screw terminal interface for wiring compatibility.

Part Context

The VT56A is part of the EX-HX-VT series from Hammond Manufacturing, which specializes in industrial control transformers. This series is engineered for durability in demanding industrial settings, including machine tools. The VT56A specifically addresses the need for accurate voltage sensing in higher voltage AC systems by providing a standardized low-voltage output for meters and relays.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify exact electrical ratios and physical dimensions when considering alternative models from other manufacturers to ensure compatibility with existing chassis mounts and circuit requirements.