Reviewing ABB TF96-87 in an Existing Starter with Motor Current, Reset Behavior and Trip Feedback Considered Together
An overload relay should be selected around the motor and starting behavior. ABB TF96-87 is a thermal overload relay with a 75–87 A adjustment range and class 10 designation. The top of that range is not an instruction to set every connected motor to the same current; the actual setting belongs to the motor protection review.
Use the motor plate as the starting point
For ABB TF96-87, collect the rated motor current and the way the motor is connected in the starter. Do not select a setting from the contactor frame alone. If the existing adjustment differs from the maintenance record, resolve that discrepancy before copying it onto a replacement during an urgent repair.
Read the history behind repeated trips
A request for ABB TF96-87 often follows an interruption in production. Record whether trips occur during acceleration, after sustained loading or after a process change. This information helps the maintenance team separate an unsuitable setting from mechanical overload or a developing motor problem. Replacing the relay does not itself explain the original symptom.
Relay identity and protection features
| Review item | Technical information or confirmation needed |
|---|---|
| Requested product | ABB TF96-87 |
| ABB identifier | 1SAZ911201R1005 |
| Adjustment range | 75–87 A |
| Trip class | Class 10 |
| Reset and signaling | Manual/automatic reset; NC trip and NO signal contacts |
| Additional feature | Temperature compensation; installation conditions still require review |
Reset mode changes the operating sequence
Confirm the intended reset behavior of ABB TF96-87 with the machine control design. A restored relay state must be considered alongside the start circuit and operator procedure. Make the required reset mode explicit in the maintenance handover, rather than allowing the replacement to inherit whichever position happens to be present on receipt.
Follow both auxiliary paths
- The trip and indication contacts on ABB TF96-87 can perform different jobs in a starter.
- Trace the stop path and the alarm path on the drawing, and preserve the wire identification.
- The receiving controller may display a fault even though the motor stop function is handled through a separate hardwired circuit.
Shared reference image for the ABB TF96-87 inquiry. The image is not evidence of the exact supplied model, accessories or execution.
Fit belongs in the comparison
When ordering ABB TF96-87, confirm the mating starter hardware and mounting arrangement from the relevant assembly documentation. A shared current range does not prove that another relay fits the same contactor or wiring layout. Include terminal accessibility and any existing adapter pieces in the scope review before committing to a substitute.
Keep the setting with the asset record
- After an approved installation of ABB TF96-87, record the selected current setting, reset mode and verification result in the motor file.
- For purchasing, provide the exact code, quantity and a photograph of the existing relay.
- This creates a traceable connection between the spare supplied and the protection arrangement actually returned to service.
