Allis-Chalmers TLH-21 Locking Tab
A precision replacement locking tab for Allis-Chalmers TLH-21 load tap changers (LTCs), machined to OEM dimensional specifications. Material certification available on request.
- OEMAllis-Chalmers
- Model / SeriesTLH-21
- Part typeLocking tab
- EquipmentLoad tap changers (LTCs)
- DocumentationMaterial certification on request
- AvailabilityBuilt to order / short lead times
- Internal ref.LTCACTL304
Overview
Locking tab for the Allis-Chalmers TLH-21 LTC. Fifty-four per complete kit.
About the Allis-Chalmers TLH-21
The Allis-Chalmers TLH-21 is a later-generation reactor-type load tap changer with an isolated reversing switch design that separates the reversing switch contacts from the main switching path, reducing reversing contact wear compared to earlier TL-series designs. The main moving and stationary contacts still require periodic inspection and replacement at the manufacturer's recommended interval. The TLH-21 is found in utility distribution and transmission transformers and is fully supported by Southern Switch with new contacts, complete kits, and hardware including the collector hub, collector ring, and reversing switch assembly.
Why replace worn LTC contacts
Worn or burned tap-changer contacts raise resistance, run hot, and can lead to tap-changer failure. Precision replacements restore reliable switching and extend the service life of the LTC.
Stock, lead time & reverse engineering
Common items are produced on short lead times; discontinued or hard-to-find parts are reverse-engineered from a sample, a drawing, or a model number. Based in Palm Harbor, FL, Southern Switch & Contacts manufactures and ships replacement parts to utilities nationwide, and has served the industry since 1982.
Send the model number, asset tag, or just a description, we’ll reply with pricing and lead time within one business day.
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