Contact for Pricing
Overview
- Trip Class 10 protection compliant with IEC/EN 60947-4-1
- Phase loss sensitive for single-phasing fault prevention
- Dual contacts: NC (6A) and NO (4A) for auxiliary circuits
- Automatic or manual reset with TEST and STOP functions
- ATEX certified for use in explosive atmospheres (post week 26, 2015)
- Compatible with ABB AF80/AF96 contactors, supports 125A gG fuses
- Dual contacts: NC trip (95-96) and NO signal (97-98) for remote indication
- TEST and STOP functions for verification and emergency shutdown
- Single mounting kit available as accessory
- Remote reset/stop coils available in multiple voltage ratings
Specifications
Ambient Air Temperature | Operation -40 ... +70 °C / Operation Compensated -40 ... +70 °C / Storage -50 ... +80 °C |
Application | Mainly used for controlling 3-phase motors and generally for controlling power circuits up to 690 V AC and 220 V DC. The contactors can also be used for many other applications such as bypass, capacitor switching, lighting, DC power circuits. |
Current Rating | 40.0-51.0 A |
Poles | 3 |
Product Name | Thermal Overload Relay |
Series | TF96 |
Size | 82x110x108mm |
Special Features | The TF96-51 thermal overload relay is an economic electromechanical protection device for the main circuit. It offers reliable and fast protection for motors in the event of overload or phase failure. The device has trip class 10. Further features are the temperature compensation, trip contact (NC), signal contact (NO), automatic- or manual reset selectable, trip-free mechanism, STOP function and a trip indication. The overload relays are connected directly to the block contactors. Single mounting kits are available as accessory. |
Standard | RoHs, CSA, cUL, CE, GOST |
Trip Class | class 10 |
Type | Contactors |
Voltage Rating | Auxiliary Circuit 600 V AC / DC / Main Circuit 690/440 V AC/V DC |
Package Dimensions (L x W x H) | 3.819 IN x 3.819 IN x 4.764 IN |
Package Dimensions (L x W x H) | 9.7003 cm x 9.7003 cm x 12.1006 cm |
Package Weight (Imperial) | 1.367 L |
Package Weight (Metric) | 0.620 kg |
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Frequently Asked Questions
Does the TF96-51 have ATEX certification?
Yes, the TF96-51 is ATEX certified for use in potentially explosive atmospheres, valid for products manufactured from week 26, 2015.
What is the trip class of the TF96-51?
The TF96-51 has a trip class of 10, meeting IEC/EN 60947-4-1 standards.
What is the current setting range for the TF96-51?
The TF96-51 supports a current setting range of 40.0A to 51.0A.
What are the auxiliary contact ratings?
The NC contact (95-96) is rated 6A and the NO contact (97-98) is rated 4A for auxiliary circuits.
What type of fuse is required for short-circuit protection?
A 125A, gG type fuse is required for short-circuit protection with the TF96-51.
What is the maximum operating altitude for the TF96-51?
The maximum permissible operating altitude for the TF96-51 is 2000 meters.
What is the operating temperature range for the TF96-51?
The operating temperature range is -40°C to +70°C for open-compensated units or -25°C to +60°C for older units, with derating required above 50°C.
What conductors can be connected to the main circuit terminals?
The main circuit terminals accommodate rigid or flexible conductors from 6 to 50mm².
Is the TF96-51 suitable for single-phase applications?
Yes, the TF96-51 is suitable for both three-phase and single-phase applications.
Can the TF96-51 be mounted on a DIN rail?
Yes, the TF96-51 can be mounted on a DIN rail using a single mounting kit (accessory).
How to Install the ABB TF96-51 Thermal Overload Relay
Step-by-step guide to mounting and wiring the TF96-51 thermal overload relay for motor protection.
Estimated time: 20m
Tools needed:
Screwdriver, Crimping tool (if using ferrules)
Supplies needed:
Mounting screws, Conductors (6-50mm²), Fuses (125A, gG type), DIN rail (if using mounting kit)
- Prepare the mounting surface
Ensure the mounting surface is clean and flat. For contactor mounting, align the TF96-51 with the AF80 or AF96 block contactor. For DIN rail installation, attach the single mounting kit to the relay and secure to a 35mm DIN rail.
- Connect the main circuit
Insert rigid or flexible conductors (6-50mm²) into the main circuit terminals. Tighten screws to 6-9Nm torque. Ensure the short-circuit protective device (125A, gG type fuse) is installed upstream.
- Wire the auxiliary contacts
Connect the NC (95-96) and NO (97-98) contacts to your control circuit. The NC contact opens on overload, while the NO contact can be used for remote indication. Verify wiring complies with IEC/EN 60947 standards.
- Set the current range and reset mode
Adjust the current setting to match your motor's rated current (40-51A). Select manual or automatic reset using the reset selector on the front panel. For manual reset, press the reset button after a trip event.
- Test the installation
Use the TEST function to verify relay operation. Apply a simulated overload to confirm the trip mechanism activates and the contacts switch positions. Check for proper trip indication on the front panel.
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