Choosing the adjustment range and recording the reset arrangement for ABB TF65-47 in an AF40–AF65 motor starter assembly
ABB TF65-47 is an ABB thermal overload relay with a 36–47 A adjustment range and trip class 10. The manufacturer identifies it as 1SAZ811201R1004 and lists direct mounting for AF40–AF65 contactors. The final setting and protection coordination belong to the motor application review, not to an assumption based on the highest number printed on the relay.
Recover the setting before removal
When ABB TF65-47 replaces an installed relay, record the dial setting and the motor nameplate before dismantling the starter. Capture the reset arrangement and terminal references as well. These details help distinguish a failed relay from a selection or operating issue. The replacement work pack should show who approved the setting and how the required motor protection function will be checked before the starter returns to service.
Use the adjustment band deliberately
The 36–47 A range of ABB TF65-47 is an adjustable band, not an instruction to set every application to 47 A. Compare the motor requirements and the approved starter design with the manufacturer instructions. If the required setting lies outside the band, the purchasing team should request an engineering decision rather than silently substitute a nearby TF65 reference. Keep that decision attached to the quotation.
Protection selection record
| Selection item | Verified information or configuration check |
|---|---|
| Requested relay | ABB TF65-47 |
| Product identifier | 1SAZ811201R1004 |
| Adjustment range | 36–47 A |
| Trip class | 10 |
| Listed mounting family | AF40–AF65 contactors |
| Installed setting | Determine from the motor and approved protection design |
| Reset and signaling | Confirm the installed arrangement and auxiliary wiring |
Mechanical fit still needs a drawing
Direct mounting information narrows the selection for ABB TF65-47, but the complete assembly should be checked. Identify the installed contactor, terminal accessories and surrounding cable space. If a separate mounting arrangement is intended, obtain the appropriate accessory specification. A warehouse description such as thermal relay is too broad to ensure that the delivered item can be fitted into the existing starter without additional parts.
Shared reference image associated with ABB TF65-47; it does not establish the exact delivered model, options or accessories.
Trip behavior is part of the operating story
Describe the starting conditions and the history of nuisance trips when requesting ABB TF65-47. That information allows the responsible engineer to assess whether the recorded protection arrangement is appropriate. The buyer should avoid promising that a replacement will resolve a process overload or a mechanical motor problem. A well-defined order separates the relay supply from the plant investigation that determines why a trip occurred.
Avoid overlapping-range assumptions
- TF65-53 and other neighboring TF65 models should be listed separately from ABB TF65-47 during comparison.
- An overlapping adjustment range does not make two purchase lines identical.
- Confirm the intended reference, manufacturer code and mounting requirements.
- Receiving inspection for ABB TF65-47 should check the dial markings, label and visible condition against the approved offer, then preserve the unit identity in the maintenance history.
Hand over a usable spare
The spare package for ABB TF65-47 should include a legible part identity and the agreed accessory scope. Protect the adjustment and terminal area during storage. When the maintenance team issues ABB TF65-47, it should be able to recover the matching starter record without relying on a photograph alone. That link between spare and application supports a more controlled replacement during a short maintenance window.
