Allen-Bradley 1497-B-M4-3-N 1497 Series Control Circuit Multi-Tap Transformer

Product Overview

The Allen-Bradley 1497-B-M4-3-N functions as an 80VA industrial control circuit transformer (CCT) designed for heavy-duty electrical panel deployment. This multi-tap voltage regulator steps down high incoming three-phase distribution lines to safe, manageable single-phase working voltages. It supplies stable power directly to downstream pilot devices, contactor coils, relays, and small solid-state hardware modules.

(Note: While certain generic inventory logs misclassify this electromagnetic device as a current transformer, this component operates strictly as a voltage step-down control circuit transformer). We ship this electrical component exclusively as a 100% brand new, original factory-sealed unit, which ensures pristine varnish insulation coatings, untouched terminal screw threads, and flawless factory-mounted fuse holders.

Technical Specifications

The table below logs the power ratings, terminal layout configuration, and precise winding configurations of the 1497-B-M4-3-N hardware platform:

Engineering Advantages

• Simplifies International Panel Adaptation via Multi-Tap Core: The primary side contains distinct winding taps for 380V, 400V, and 415V utility lines. This multi-tap layout allows machine builders to export a single control cabinet design to various global regions, adjusting the input tap wire to match the specific local industrial grid voltage.

• Reduces Enclosure Footprint via Built-In Fuse Blocks: The transformer design integrates two primary fuse blocks and one secondary fuse block straight onto the top terminal frame. This compact layout eliminates the need to allocate separate DIN rail space for external fuse holders, saving valuable layout real estate inside crowded automation enclosures.

• Minimizes Heat Degradation via Vacuum-Impregnated Windings: The copper windings utilize high-grade electrical varnish applied through a strict vacuum-impregnation process. This solid core structure eliminates air pockets inside the layers, seals out airborne dust and humidity, and optimizes heat dissipation to prevent thermal degradation during continuous high-inrush contactor operations.

FAQs

• How do technicians wire the secondary side to select between 115V AC and 230V AC output?

  The dual-winding secondary side relies on specific terminal jumper configurations. To output 115V AC, technicians must wire the secondary coils in a parallel configuration by jumpering the corresponding terminals together. To output 230V AC, technicians must wire the secondary coils in a series configuration, passing the current sequentially through both internal windings. Always refer to the wiring diagram stamped on the side of the unit before energizing.

• Why does the specification sheet state "No Secondary Fuse" if a secondary fuse block exists?

  The 1497-B-M4-3-N includes the physical physical molded plastic fuse block framework mounted on top of the transformer frame. However, the factory package does not contain the actual physical secondary fuse link or fuse wire element itself. Technicians must purchase and install the correct amperage-rated cartridge fuse separately based on their specific downstream electrical load calculation.

• What mounting adjustments protect this heavy transformer from high-vibration damage?

  This unit weighs 5.37 lbs and features a heavy steel core baseplate with four slotted mounting holes. Technicians should bolt the transformer base plate directly to a rigid sub-panel using heavy-duty steel screws and split lock washers. Avoid mounting this component onto weak sheet metal enclosures or close to high-vibration equipment like large mechanical shake-conveyors or high-frequency stamping presses without utilizing dampening pads.