ABB SACE TMAX T4 S 160 Four-Pole Circuit Breaker
The ABB SACE TMAX T4 S 160 is a four-pole molded case circuit breaker belonging to the Tmax series, designed for reliable overcurrent protection in three-phase electrical systems with switched neutral requirements. This compact breaker combines robust construction with thermal-magnetic protection, offering a space-efficient solution for main distribution boards, feeder circuits, and motor control applications.
Frame Construction and Ratings
The T4 S frame is rated for 160 amperes and accommodates four poles, providing simultaneous switching and protection for three-phase conductors and the neutral conductor. The molded case construction ensures high dielectric strength and mechanical durability, with operating voltages suitable for low-voltage distribution networks. Breaking capacity ratings are selected to match system fault levels, ensuring reliable interruption under short-circuit conditions.
Thermal-Magnetic Protection
Integrated thermal-magnetic trip units provide comprehensive overcurrent protection. The thermal element responds to sustained overload conditions with an inverse time characteristic, protecting conductors and connected equipment from overheating. The magnetic element provides instantaneous tripping for short-circuit events, limiting fault energy and minimizing damage. This combined protection approach ensures selective coordination when properly coordinated with upstream and downstream devices.
Four-Pole Configuration Features
The four-pole design includes provisions for neutral conductor protection, essential in systems where the neutral is considered a live conductor. Configurable options allow the neutral pole to be protected or unprotected based on application requirements. The switching mechanism ensures simultaneous operation of all poles, maintaining system integrity during both manual operation and automatic tripping events.
Modular Accessories and Flexibility
A comprehensive range of field-installable accessories supports application-specific requirements. Auxiliary contacts, shunt trips, undervoltage releases, and alarm switches can be added without modifying the breaker enclosure. Motor operators enable remote control capability, while padlockable handles provide safety during maintenance activities. This modular approach allows the base breaker to be adapted to evolving system needs.
Installation and Application Suitability
The compact dimensions of the T4 S frame optimize panel space utilization, allowing higher component density in distribution boards. Fixed mounting configuration provides secure installation with accessible terminals for cable connections. Typical applications include commercial building distribution, industrial control panels, and equipment protection where four-pole switching with neutral protection is specified.
