ABB S3N 3P 150A Standard thermal-magnetic

ABB  S3N 3P 150A Standard thermal-magnetic

General 

The S3 breaker family ranges from 15 through 225 amperes. The S3 trip mechanisms are non-interchangeable and use sensitive electromagnetic relays for overcurrent trip protection. Heat sensitive bimetals are used for thermal overcurrent protection. Short circuit current protection begins at 10 times the thermal rating of the breaker and uses a magnetic coil principle.

Versions

To meet all application needs, the S3 is available in various versions:

T =Thermal-magnetic

Q =100% UL/CSA rated

D = Molded case switch

M = Magnetic only (MCP)

Performance level

Each version is also available in different maximum fault interrupting levels

B  = 240VAC

N = Normal

H = High

L = Extra high

Number of poles

In UL/CSA form, the S3 is available in two pole or three pole versions, both with the same dimensions. A four pole version is also available in IEC form. For price estimate, add 35% to list price of selected version three pole breaker, contact

ABB for details.

Accessory mounting

Internal accessories are UL/CSA approved for both factory or field installation.Accessories require control cable connectors.  Shunt trips or UVR's mount in the left cavity. Auxiliary or bell alarm switches mount in the right cavity.

Reverse feeding

All versions of the S3 family are suitable for reverse feed applications.

Molded case switches

UL/CSA switches include no overcurrent protection except for a high  instantaneous trip mechanism for self protection. IEC type molded case switches with no trip protection are also available.

Core technical parameters

Electrical parameters

Rated current: 150A, capable of stably carrying this current and meeting the operational needs of many medium and large electrical equipment and distribution lines.

Rated voltage: usually 600V (there are also versions that are compatible with other voltage levels in some application scenarios), suitable for common industrial and commercial power system voltage environments.

Pole number: 3 poles, can simultaneously protect and control three-phase circuits, widely used in electrical systems with three-phase power supply.

Performance parameters

Release characteristics: The thermal magnetic release method combines the advantages of thermal release and electromagnetic release. Thermal trip is mainly aimed at overload situations. Through the principle of bimetallic strip bending under heat, when the current exceeds the rated value for a certain period of time, the bimetallic strip bending pushes the trip mechanism to act, cutting off the circuit and protecting the equipment from overload damage; Electromagnetic release is used for short-circuit protection. When a short circuit with high current occurs in the circuit, the electromagnetic force quickly pushes the release to operate, cutting off the circuit in a very short time, effectively preventing the short-circuit current from causing serious damage to equipment and circuits.

Breaking ability: With high short-circuit breaking ability, it can quickly cut off large currents in the event of a short-circuit fault, ensuring the safety of the electrical system. The breaking ability varies in different application scenarios, generally in the tens of thousands of amperes level, which can meet the short-circuit protection needs of most industrial and commercial places.

Product advantages

Efficient protection: The thermal magnetic trip mechanism can quickly and accurately respond to overload and short circuit faults, cut off the circuit in the shortest possible time, effectively protect electrical equipment and lines, and reduce losses caused by faults.

Wide adaptability: Suitable for various types of electrical systems and load characteristics, providing reliable protection for inductive, resistive, and capacitive loads, with strong versatility and adaptability.

Brand guarantee: ABB, as a globally renowned electrical equipment manufacturer, has advanced technology research and development capabilities and strict quality control systems. Its products have been extensively verified through practical applications, with reliable quality and stable performance, providing users with strong brand guarantee and after-sales support.