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ABB TF14 Thermal Overload Relay 1 NO/1 NC 90A F.L.C 690V AC 3P TF140DU-90

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ABB TF14 Thermal Overload Relay 1 NO/1 NC 90A F.L.C 690V AC 3P TF140DU-90

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Category Thermal Overload Relay Brand ABB Condition New

Specifications

Country of Origin	India
Brand	ABB
Length	89mm
Model	TF14
Depth	126mm
IP Rating	IP10, IP20
Width	140mm
Mount Type	Under Contactor Mount
Series	TF14
Maximum Operating Temperature	55°C
Minimum Operating Temperature	-25°C
Terminal type	Flat
Supply Voltage	690V ac
Contact Voltage	440, 500V dc
Reset Method	Automatic & Manual
Normal State Configuration	1 NO/1 NC
Number of Auxiliary Contacts	2
Pole and Throw Configuration	3P
Control Voltage	690V ac
FLC Motor Rating	90A
Adjustable Current Range	66 → 90 A

Key Features

The device features 1 normally open and 1 normally closed auxiliary contact.
It supports automatic and manual reset methods for operational flexibility.
The adjustable current range spans from 66 to 90 amperes.
Thermal overload protection is trip class 10A with phase loss sensitivity.
IP10 and IP20 ratings ensure protection in typical industrial environments.
Suitable for three-pole under contactor mount applications.
Complies with IEC, EN and UL standards for safety and reliability.
Equipped with TEST and STOP functions plus trip indication on the front.

Product Description

ABB TF14 Thermal Overload Relay model TF140DU-90 is a robust and reliable protection device primarily used to safeguard motors against overload and phase failure in industrial setups. Rated for a full load current (FLC) of 90 amperes and designed for a supply voltage of 690V AC, this under-contactor-mounted relay is ideal for three-phase electrical installations.

This relay offers enhanced operational flexibility with two electrically isolated auxiliary contacts configured as 1 normally open (NO) and 1 normally closed (NC). It features manual or automatic reset options to suit various control requirements, alongside built-in phase loss sensitivity to prevent motor damage.

The adjustable current setting allows calibration in the range of 66 to 90 amperes, enabling precise overload protection. Its compact form factor, measuring 140mm in width, 89mm in length, and 126mm in depth, makes it suitable for versatile mounting in control panels.

Designed with industrial environmental conditions in mind, the relay possesses IP10 and IP20 ingress protection ratings, ensuring durability against dust and incidental contact. Operating temperature ranges from -25°C minimum to 55°C maximum, facilitating performance under diverse climatic conditions.

Two auxiliary contacts for effective control and signaling. Test and stop functions with front panel trip indication for quick diagnostics. Compliant with IEC/EN 60947 series and UL 60947 safety standards for industrial electrical equipment.

Temperature compensation feature supports consistent operation. Suitable for both single-phase and three-phase motor protection. Provides reliable thermal overload protection with trip class 10A.

Commonly used in industrial automation, water treatment plants, manufacturing facilities, and HVAC systems, the ABB TF14 Thermal Overload Relay ensures motor longevity and operational safety. It’s a vital component in electrical control and protection gear for automation engineers and maintenance professionals.

Explore the ABB category for more high-quality relays and contactors to meet various industrial application needs at EnvMart.