Section 14: Transformers PDF

Section 14: Transformers PDF

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Control Transformer Disconnects

Square D™ brand transformer disconnects mount inside or outside a control system enclosure. The transformer disconnect being connected directly to the 480 Vac system controls power for auxiliary, single-phase loads when the main three-phase disconnect is either ON or OFF. The transformer disconnect is normally wired to the line side of the control panel's main disconnect.

Transformer Disconnects for NEMA Type 1 and Type 12 Enclosures

Transformer Disconnects
NEMA Type 1 Standard,
NEMA Type 12 Standard, and NEMA Type 1 Mini.
 

This convenient source of 120 Vac power can be used for auxiliary or isolated loads, such as panel lighting, portable power tools, and programmable controller equipment.

Units consist of copper-wound transformers, a disconnect switch, and primary and secondary fuse blocks. All blocks are installed in NEMA Type 1 or Type 12 enclosures.

Transformer disconnects are UL Listed. Use Square D brand Type TF (9070TF) industrial control transformers and Square D brand disconnect switches.

Refer to the following for additional information, selection, and wiring diagrams.

  • Standard NEMA Type 1

  • Mini NEMA Type 1

  • Compact NEMA Type 1

  • NEMA Type 12

Contact local Schneider Representative for catalog number and quotation.

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