AllansonIgnition Transformers

Allanson 2721-457 Ferromagnetic Ignition Transformer for Acme Weatherall

Allanson’s Double Pole ferromagnetic transformers are designed for constant duty and provide the most reliable ignition source for commercial, residential and industrial oil applications.

SKU 3G-OTH-03254

Also listed as: 2721457 · 2721 457

Brand

Allanson

Item

2721-457 Ferromagnetic Ignition Transformer for Acme Weatherall

Local availability & support — the Philippines

Delivery: 5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment: Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to: Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Allanson

Poles

Double 

Current

23mA 

Can Size

Small Can Series 

Grounding

Mid Point Ground 

Application

OIL

Burner Type

ACME WEATHERALL 

Hv Terminal

Zinc Plated Button 

Input Voltage

120V 

Hinge Location

Side Hinge 

Input Frequency

60Hz 

Secondary Voltage

10000V 

Burner Manufacturer

ACME WEATHERALL 

Datasheet Content

[{"filename":"FerromagneticDP_SpecSheet_21-4141121_04-Sep-2025.pdf","text":"FERROMAGNETIC TRANSFORMERS\n                                                                       2721 / 2744 / 2730 / 2714 / 421 / 444 / 911 / 912\n                                                                                         SPECIFICATION GUIDE\n\n\n                    DOUBLE POLE, MID POINT GROUND MODELS\n\n Allanson’s ferromagnetic transformers are designed for constant duty and provide the most reliable ignition\n source for commercial and/or industrial oil applications.\n\n\n  Absolute Maximum Ratings\n  Model #                                           2721, 421*        2744, 444*         911*       2730, 912*         2714\n  Rated Operating Input Voltage (V)                     120               240             240           120             120\n  Operating Input Voltage Range (V)                   108-132           216-252        216-252        108-132        108-132\n  Input Supply Frequency (Hz)                            60                60             50             50             60\n  Primary Voltage - Amperes (VA)                        250               250             250           250             275\n  Secondary Voltage (RMS)                              10,000            10,000         10,000         10,000         12,000\n  Secondary Short Circuit Current (mA)                   23                23              23            23              20\n  Storage Temperature (°C)                          -40 to +80        -40 to +80      -40 to +80    -40 to +80      -40 to +80\n  Operating Temperature (°C)                        -30 to +40        -30 to +40      -30 to +40    -30 to +40      -30 to +40\n  Operating Relative Humidity (%)                        90                90              90            90              90\n  Loading Air Gap (inches)                           1/8 - 3/16        1/8 - 3/16     1/8 - 3/16     1/8 - 3/16     1/8 - 3/16\n\n * Service replacement transformers are available in select models.\n\n\n\n\n83 Commerce Valley Drive E., Markham, ON L3T 7T3                                    181 Cooper Ave., Suite 112, Tonawanda, NY 14150   #21-414\n      T: 1.800.661.7251 ● F: 1.416.752.6718                                               T: 1.631.293.3880 ● F: 1.631.293.3470        1121\n\n\n                  For more information, please visit us at allanson.com or e-mail us at cservice@allanson.com"}]

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Allanson Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Allanson’s Double Pole ferromagnetic transformers are designed for constant duty and provide the most reliable ignition source for commercial, residential and industrial oil applications.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Allanson 2721-457 ferromagnetic ignition transformer used for?

The Allanson 2721-457 is a double-pole ferromagnetic ignition transformer designed for constant-duty ignition in commercial, residential, and industrial oil burners, specifically the Acme Weatherall. It provides a reliable 10,000 V secondary voltage at 23 mA for consistent oil ignition.

What are the specifications of the Allanson 2721-457 ignition transformer?

The Allanson 2721-457 has a 120 V input voltage at 60 Hz, 10,000 V secondary voltage, 23 mA secondary short-circuit current, and 250 VA rating. It features double-pole, mid-point grounding, a side hinge, and zinc-plated button HV terminals. Operating temperature range is -30 °C to +40 °C.

Where to buy the Allanson 2721-457 in Singapore?

You can source the Allanson 2721-457 ferromagnetic ignition transformer through 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this Acme Weatherall-compatible transformer.

How to install the Allanson 2721-457 ignition transformer on an Acme Weatherall burner?

Ensure the transformer is mounted securely with the side hinge aligned. Connect the 120 V primary supply to the correct terminals and verify the mid-point ground. Set the air gap to 1/8 to 3/16 inches for proper spark. Always follow the burner manufacturer's wiring diagram and safety procedures.

Used in

Common applications for Allanson

Oil burner retrofit maintenance — Allanson CAT 1092 TYPE F transformer replacement in existing Beckett control circuits

Industrial heating-system commissioning — Control transformer installation in multi-stage flame-safeguard burner startup sequences

Plant emergency maintenance — Same-day T92 transformer procurement to restore failed ignition control voltage supply

Burner control-cabinet assembly — Allanson transformer integration in custom control-circuit designs for process-heating applications

Field technician spare-parts kit — Stocking CAT 1092 and T92 variants for mobile maintenance coverage of regional burner installations

Allanson Products

3G Electric supplies Allanson ignition transformers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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