Overview
The ABB T16-10 thermal overload relay is an economic electromechanical protection device engineered for main-circuit motor safeguarding. Rated for Class 10 trip response, it provides fast and reliable protection against overload and phase-failure conditions. The T16-10 operates on a 690 V AC main circuit with 600 V AC/DC auxiliary capability, making it suitable for three-phase and single-phase motor applications across industrial and commercial installations.
Key Features
- Class 10 Trip Rating: Fast, consistent trip response minimizes motor damage and downtime.
- Adjustable Current Range: 7.6–10 A setting range accommodates a range of motor sizes with one device.
- Temperature Compensation: Maintains reliable protection across ambient temperature variations.
- Dual Reset Modes: Manual or automatic reset selectable to suit application requirements.
- Direct Mounting: Connects directly to ABB mini and block contactors with optional single-mounting accessory kits.
- Phase Loss Sensitivity: Detects and responds to phase-failure conditions, protecting three-phase motors.
- Trip-Free Mechanism: Ensures immediate disconnect on overload, even if the reset button is held.
- Integrated STOP Function: Manual trip contact (NC) and signal contact (NO) for integration with control logic.
- Clear Trip Indication: Status indicator simplifies diagnostics and maintenance.
Technical Specifications
The relay features a 3-pole bimetallic design with one normally closed (NC) trip contact and one normally open (NO) signal contact. Its compact form factor saves panel space while maintaining robust electrical connectivity through screw-type main-circuit terminals.
Typical Applications
The ABB T16-10 is widely specified for:
- Three-phase and single-phase motor circuits in industrial machinery.
- Pump, compressor, and fan motor protection in HVAC and process systems.
- OEM motor-starter assemblies and panel-builder applications.
- Retrofit and maintenance replacements in existing control systems.
- Direct-on-line (DOL) starter configurations with contactors.
Compatibility & Replacements
The T16-10 is part of the ABB T16 series and is designed for drop-in mounting on ABB mini and block contactors. No modification to existing contactor wiring is required. Optional DB16 panel-mount adapters are available for flexible installation positions. When replacing other thermal overload relays, verify the current-rating range and contactor mechanical compatibility before installation. Electricians should consult the equipment manual to confirm mounting orientation and reset-mode setting before commissioning.
