TA110DU-90 ABB 1SAZ411201R1001 Thermal Overload Relay

Model: TA110DU-90

Brand: ABB

Product ID: 1SAZ411201R1001

EAN: 4013614216794

Product Type: Thermal Overload Relay

Product Family: TA110DU

Current Setting Range: 66–90 A

Rated Operational Current: 90 A

Number of Poles: 3

Trip Class: 10A

Main Circuit Rated Voltage: Up to 690 V AC

Auxiliary Contact Configuration: 1 NO + 1 NC

Reset Mode: Manual or automatic, selectable

Protection Functions: Motor overload and phase-loss protection

Test and Stop Functions: Yes

Trip Indication: Front-panel indication

Temperature Compensation: Yes

Mounting: Direct connection to compatible block contactors; DB200 single mounting kit available

Net Weight: Approximately 0.75 kg

Product Introduction

 

The ABB TA110DU-90 is an electromechanical thermal overload relay for protecting motors against excessive current and phase-loss conditions. Its three-pole bimetallic mechanism responds to heating caused by motor current and trips when the configured protection threshold and operating conditions are reached.

 

With an adjustable range of 66–90 A, this model is intended for motor circuits whose required overload setting falls within that range. The 10A trip class, phase-loss sensitivity and temperature compensation are important selection characteristics when coordinating motor protection with the application.

 

The relay also provides separate normally open and normally closed auxiliary contacts for signaling and control-circuit use. A front-panel trip indication and TEST and STOP functions support local operation and checking.

• Thermal Overload Protection: Responds to sustained overcurrent conditions that can cause excessive motor heating.

• Phase-Loss Sensitivity: Detects phase-loss conditions that can expose a three-phase motor to damaging operating conditions.

• Adjustable Current Setting: Allows the overload threshold to be set within the 66–90 A range to suit the motor's nameplate current and protection requirements.

• Auxiliary Contact Signaling: Provides one NO and one NC contact for associated control or indication circuits.

• Selectable Reset: Supports manual or automatic reset according to the selected operating mode and application requirements.

• Local Test and Stop: Provides front-accessible functions for testing and stopping the relay mechanism.

• Temperature Compensation: Helps account for ambient temperature effects on thermal operation.

The TA110DU-90 is used in motor control circuits where thermal overload protection is required and the motor's protection setting falls within the relay's adjustment range.

• Industrial Motor Control Panels: Overload protection for motors used in production machinery and plant equipment.
• Pumps and Fans: Protection of appropriately rated motors in fluid-handling and ventilation systems.
• Conveyors and Material Handling: Motor protection in drive arrangements where the relay's current range and trip characteristics are suitable.
• Contactor-Based Motor Starters: Installation in compatible contactor assemblies to provide thermal overload protection alongside motor switching.
• Maintenance and Replacement: Replacement of an existing TA110DU-90 when the current range, mounting arrangement and associated protection components match.

The TA110DU-90 is a motor overload protection device, not a standalone short-circuit protective device. The upstream fuse or other specified short-circuit protection must be selected and coordinated with the motor circuit.

ABB's catalogue lists the following short-circuit protective-device recommendations for this model:

• gG fuse: 200 A
• aM fuse: 160 A

These are catalogue coordination values, not substitutes for checking the complete installation, applicable standards and manufacturer's coordination tables.

Before replacing an installed relay, verify the motor's rated current, required overload setting, contactor compatibility, auxiliary wiring and reset mode. Automatic reset should only be selected where the control arrangement and safety requirements permit it.

Related Accessory

 

DB200 Single Mounting Kit - ABB Product ID 1SAZ401110R0001. This accessory is listed for individual mounting of TA110DU thermal overload relays. Confirm the required mounting arrangement before ordering it with the relay.

 

What is the current adjustment range of TA110DU-90?

Its published setting range is 66–90 A. The final setting should be selected according to the motor and the applicable protection requirements.

What does trip class 10A mean?

It identifies the relay's overload tripping characteristic under the applicable standard. It should be considered when selecting motor protection for the starting conditions and load.

Does this relay provide short-circuit protection?

No. It provides thermal overload and phase-loss protection. A suitably coordinated upstream short-circuit protective device is also required.

Can the relay reset automatically after a trip?

Manual and automatic reset are selectable. The appropriate mode depends on the application and its safety and control requirements.

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