Moloney MA/MB Full Kit
A precision replacement kit for Moloney MA/MB load tap changers (LTCs), machined to OEM dimensional specifications.
- OEMMoloney
- Model / SeriesMA/MB
- Part typeKit
- EquipmentLoad tap changers (LTCs)
- AvailabilityBuilt to order / lead time confirmed at quote
- Internal ref.LTC-MO-MAMB-FULL-KIT
Overview
Full contact kit for the Moloney MA/MB LTC: selector, transfer, and reversing switch contacts, plus the locking tabs, bolt plates, and accelerator spring. Twelve line items, 204 pieces per complete kit.
About the Moloney MA/MB Load Tap Changer
The Moloney MA and MB are load tap changers produced by Moloney Electric and found in Moloney-nameplate transformers across Canadian and U.S. utility fleets. They use a transfer switch, selector switch, and reversing switch arrangement with bolted contact and lock-tab construction. The selector, transfer, and reversing switch contacts are the primary wear components at maintenance intervals. Southern Switch machines replacement contacts and kits for both the MA and MB configurations.
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
Lead time is confirmed at quote; 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.
The complete Moloney MA/MB contact kit covers twelve line items, 204 pieces per complete kit. Quantities shown are per complete kit. Contact us for pricing and lead time.
What’s in the kit
Every part below ships in the kit, listed with its OEM number and the quantity per kit. Need only certain parts or quantities? Tell us and we will tailor the quote.
| Ref | Description | Qty |
|---|---|---|
| 1 | Selector Switch Stationary Contact (OEM 8491) | 24 |
| 2 | Selector & Reversing Switch Moving Arcing Contact (OEM 12197) | 18 |
| 3 | Reversing & Transfer Switch Stationary Contact (OEM 8489) | 12 |
| 4 | Selector & Reversing Switch Stationary Contact (OEM 8490) | 3 |
| 5 | Transfer Switch Movable Contact (OEM 12195) | 12 |
| 6 | Transfer Switch Moving Arcing Contact (OEM 12196) | 12 |
| 7 | Transfer Switch Stationary Arcing Contact (OEM 8488) | 6 |
| 8 | Reversing / Transfer Switch Locking Tab | 18 |
| 9 | Reversing Switch Stationary Lock Tab | 27 |
| 10 | Selector Moving Bolt Plate | 18 |
| 11 | Transfer Moving Bolt Tab | 48 |
| 12 | Accelerator Spring (OEM 8373-00) | 6 |
Worn but not scrap? Send us your used contacts. We recondition them to OEM dimension, or machine a new set from your sample, and return them tested and documented. Often cheaper and faster than buying new.
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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