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Air circuit breakers can be used both as circuit-breakers for general protection (of plants, of user complexes, of electric lines) and as protection circuit breakers of electrical machines (generators, motors, transformers, capacitors).

These can be used both as circuit-breakers for general protection (of plants, of user complexes, of electric lines) and as protection circuit-breakers of electrical machines (generators, motors, transformers, capacitors). They are used in all types of plants (civil, industrial, and in the service sector) as well as in the equipment on-board ships, in mines, in prefabricated substations, and for primary and secondary distribution in general.

Specific characteristics
All the SACE Emax circuit-breakers except for Emax X1, have the same height and depth both in the fixed and withdrawable version and allow construction of compact switchgear.
They are fitted with many features which mean the personnel can always work under conditions of maximum safety, such as racking-out with the door closed, degree of protection towards the outside up to IP54, an articulated series of safety locks and double insulation.
The innovative structure of the pole guarantees complete insulation between phases and between phase and neutral and ensures full possibility of inspection of the arcing chamber and the main contacts.
SD Pocket is an innovative function which means a PC, even a hand-held one, can dialogue with Emax by means of the Bluetooth protocol. By means of the PC, and without any cables, the following is now possible, for example: the setting of the various protections, display of the measurements including those stored in the Data Logger, to verify the state of the circuit-breaker, know the number of operations carried out, etc..

Conformity with Standards
The SACE Emax circuit-breakers and their accessories are according to the international IEC 947, EN 60947 (harmonised in 28 countries of the CENELEC), CEI EN 60947 and IEC 1000 Standards and conform to the EC Directive:

"Low Voltage Directives" (LVD) no. 73/23 EEC
"Electromagnetic Compatibility Directive" (EMC) no. 89/336 EEC.
Furthermore, a series of SACE Emax circuit-breakers conforming to the UL 1066 Standards is available.

Training on-line
The e-learning offer covers the technical and product features about our products. Each course includes narrated virtual lectures, with the voice of a speaker, and test modules, suitable to permit the student to check his learning. In order to get access to e-learning courses, please click the links below:
Emax DC
Emax X1
Low voltage selectivity with circuit breakers





























The moulded-case circuit-breakers, proposed by ABB SACE, derive from two families of apparatus: the well-known and consolidated Isomax S series and the recent but already much awarded Tmax series (Top selection at Intel Design 2003 for their technological content and respect of the environment ). In particular, Tmax are characterised by an extremely high level of performances with limited overall dimensions, installation simplicity and an increasingly greater guarantee of safety for the operator thanks to their reinforced insulation. Tmax circuit-breakers, thanks to their performances, completeness of protection releases and accessories, can be used for all distribution and sub-distribution application for both AC and DC electrical plants.

Specific characteristics of Tmax
The Tmax series is characterised by being a product with a high technological content - the fruit of the most advanced design and simulation tools with excellent performances in minimum overall dimensions.

Thanks to the new technology used for the arcing chambers and the speed of contact opening, the circuit-breakers of the Tmax series guarantee strong limitation of the specific let-through energy and reduction in the peak currents, therefore limiting overheating of the devices and electro-dynamic stresses.

Furthermore, the new Tmax circuit-breakers use a completely common and standardised range of accessories with considerable advantages in terms of reduced stocks as well as flexibility and ease of use. Then within this range there are also the new residual current releases up to 500 A.

Field of application
The moulded-case circuit-breakers are used in industrial and civil low voltage plants with service currents from 1 to 1000 A. They are used in direct and alternating current distribution switchgear, for motor protection (Motor Control Center), generators, capacitors and for end users.

Training on-line
The e-learning offer covers the technical and product features about our products. Each course includes narrated virtual lectures, with the voice of a speaker, and test modules, suitable to permit the student to check his learning. In order to get access to e-learning courses, please click the links below:

   Series G Global Circuit Breakers
Built for use worldwide, Series G Molded Case Circuit Breakers range from 15A to 2500A and feature field fit accessories, global certifications and space-saving footprints to meet a wide array of circuit protection applications and user requirements.
   Series C NEMA Circuit Breakers
Eaton’s Series C Molded Case Circuit Breakers are UL489 Listed for use in North America. They offer dependable branch circuit protection for commercial and industrial panelboards, switchboards, and motor control centers. Available for replacements and upgrades up to 600 VAC and 2500A.
   OEM Panelboards and Switchboards (OPS) Program
Distribution assembly equipment is developed with different product levels depending on the integration requirements. EOEMs have the unique opportunity to select the appropriate building block to match their manufacturing and engineering capabilities. The OPS Program enables EOEMs to reduce inventory, improve on-time delivery rates and remain competitive in the marketplace.
   Electronic Trip Units
Eaton's Electronic Trip Units for molded case circuit breakers are designed to meet a broad range of monitoring and protection requirements. They offer instantaneous, long and short delay, ground fault and arc flash protection as well as true rms sensing for increased accuracy and reliability.
   PM3 Communications
Introducing the Power Monitoring Metering Module (PM3) for the Series C F-Frame and K-Frame and Series G J-Frame and L-Frame Molded Case Circuit Breakers. The PM3 module is a compact, power monitoring, measuring, metering, and communications solution used in combination with Eaton’s MCCB family of products.
   Mining Circuit Breakers
Eaton has been the undisputed leader in electric power distribution to the mining industry for 40 years. E2 mining service breakers are designed for a broad range of mining applications, especially for trailing cable protection per MSHA 30 CFR 75.
   Engine Generator Circuit Breaker
Eaton is a component leader for engine generator applications with circuit breakers designed specifically for generators and portable or temporary power equipment where lower interrupting currents are common.
Eaton's Molded Case Naval/Marine circuit breakers offer enhanced performance and dramatic logistical savings while providing overload protection for conductors and short-circuit protection for all circuit elements such as conductors, motors, and starters.
   Definite Purpose (DP) Circuit Breakers
Eaton's Definite Purpose molded case circuit breakers are designed to provide an economical alternative for NEMA HVAC/R and pumping applications.
   Direct Current (DC) Circuit Breakers
The Eaton DC breaker family is engineered to address the highest performance requirements while providing numerous accessories to fit different site specifications
   Motor Circuit Protection
UL Recognized and UL Listed Motor Circuit Protectors and Motor Protection Circuit Breakers offer reliable protection for motor circuits and short circuit current ratings up to 100,000 Amps.
   Enclosed Circuit Breakers
Eaton’s enclosed circuit breakers offer all the advantages and accessories of a circuit breaker packaged in an enclosure for nearly any application requiring a means of disconnect.























MCB´s protect installations against overload and short-circuit, warranting reliability and safety for operations.

New System pro M compact S 200 series satisfies most common requirements in terms of MCB´s, allowing the usage of them for domestic, industrial and commercial applications. All the MCB´s comply to IEC/EN 60898 and IEC/EN 60947-2 Standards.
Miniature circuit breakers (MCBs)

For domestic/residential installations in emerging markets: typical breaking capacities 3 / 4,5 / 6 kA
Compact Home SH 200 T, SH 200 L, SH 200
For domestic or small commercial installations: up to 10 kA breaking capacity
specials S440, S950/970
proM compact S200, S200 M
For industrial installations up to 25 kA breaking capacity and specials
proM compact S200, S200M, S200P, S200U, S200UP
specials S280UC, S290
Special, selective, back-up MCB’s for for utilities, with high breaking capacity (25 kA) and full selectivity to downstream breakers, range S 700
For commercial and industrial applications with high breaking capacities and special features / accessories, ranges S200P, 290, S500, S610, S220, S800











RCCBs are only sensitive to current leakage to earth. They must be used in series with an MCB or fuse which protects them from the potentially damaging thermal and dynamic stresses of any overcurrents.

These devices are used in systems already equipped with MCBs which preferably limit the specific energy passing through, also acting as the main disconnecting switches upstream of any derived MCBs (e.g. domestic consumer unit).

RCCBs in the System pro M compact range

  • .F 200 AC and A type
  • .F 200 with neutral pole on the left, AC and A type
  • .F 200 IEC Standard, AC type
  • .F 200 AP-R high-immunity, AC and A type
  • .F 200 selective, AC and A type
  • .F 200 B type and B type selective
  • .F 200 B type for photovoltaic applications RCCBs in the Compact Home range
  • .FH 200 AC and A type

AF contactor range The new standard in motor control and power switching. Connect to Control!

Featuring AF technology as standard, the complete range of ABB’s AF contactors establishes a new industry benchmark. The electronically controlled coil offers multiple benefits over conventional alternatives, and together with ABB’s wide product offering – an optimal configuration, every time.

Connect to Control.

Secure uptime
Time to prevent stoppages caused by voltage fluctuations. The AF contactor ensures distinct operation in unstable networks and signifies a major advance in motor control and power switching. Voltage sags, dips and surges pose no threat.

Access global support
The contactor and motor protection range from ABB is designed in compliance with all major national and international standards and is available worldwide via a global distribution network. The standard contactor coil now handles 100 V-250 V, AC/DC for use in Europe or Asia as well as North America.

Optimize logistics
With its contactor and motor protection range, ABB has managed to reduce the number of contactor coils needed for the standard voltage range to just four. The total number of product variants has been reduced by up to 90%. This simplifies the customers’ logistics and cuts administration costs.

Simplify design
By reducing the contactor's coil energy consumption by up to 80%, panels can be built smaller and transformers more compact. All the features of the AF technology, along with access to drawings and coordination tables online, simplifies your design and assembly process.

The AF contactor secures your uptime, gives you global support, optimizes your logistics and simplifies your design.


Manual Motor Starters (MMS) are protection devices for the main circuit. They combine motor control and protection in a single device. MMS are used mainly to switch motors manually ON/OFF and protect them and the installation fuse less against short-circuit, overload and phase failures. Fuse less protection with a manual motor starter saves costs, space and ensures a quick reaction under short-circuit condition, by switching off the motor within milliseconds.

ABBs Manual Motor Starters can be equipped with many other accessories. Connection links ensure that the ABB Manual Motor Starter can be connected to ABB Block Contactor and Soft starters easily and wiring-free.

The ABB Manual Motor Starter covers a range up to 100 A for motors protection up to 45 kW / 400 V.

Manual Motor Starter with a short-circuit service breaking capacity Ics of up to 50 kA MS116 is a compact and economic range for motor protection up to 15 kW (400 V) / 32A in width of 45 mm.

MS450/MS451 cover the range from 15 kW (400 V AC) / 32 A to 22 kW (400 V AC) / 50 A in a width of 55 mm.

MS495 are for the protection of bigger motors up to 55 kW (400 V) / 100 A in a width of 75 mm.

High performance Manual Motor Starter with short-circuit service breaking capacity Ics of up to 100 kA MS132 is a compact and powerful range in 45 mm width for motor protection up 15 kW (400 V) / 32 A.

MS496/MS497 are for the protection of bigger motors up to 55 kW (400 V) / 100A in a width of 75 mm.

High performance Manual Motor Starter for special applications with short-circuit service breaking capacity Ics of up to 100 kA MS325 is a high performance Manual Motor Starter up to 12.5 kW (400 V) / 25A and with a very low "energy let through"-value. In addition, special versions for SMISSLINE available.

Characteristics of Manual Motor Starter range


Thermal overload relays are economic electromechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure. Starter combinations are setup together with block contactors and mini contactors.

The thermal overload relays are three pole relays with bimetal tripping elements. The motor current flows through the bimetal tripping elements and heats them directly and indirectly. In case of an overload (over current), the bimetal elements bent as a result of the heating. This leads to a release of the relay and a change of the contacts switching position (95-96 / 97-98).

Characteristics of thermal overload relays: TF range

  • .Trip class 10
  • .Ambient air temperature - operation: -25°C … +60°C
  • .Sealable cover for operating elements

Characteristics of thermal overload relays: T16 range

  • .Trip class 10
  • .Ambient air temperature - operation: -25°C … +60°C

Characteristics of thermal overload relays: TA…DU range

  • .Trip class 10A
  • .Special version with trip class 20 or 30*
  • .Ambient air temperature - operation: -25°C … +55°C
  • .Special versions, suitable for protection of EEX e motors*

General characteristics of thermal overload relays

  • .Manual or automatic reset selectable
  • .Trip-free mechanism
  • .Phase loss sensitivity acc. to IEC/EN60947-4-1
  • .2 electrically isolated auxiliary contacts – 1 NO + 1 NC
  • .Test and STOP function
  • .Trip indication on the front
  • .Temperature compensation
  • .Useable for AC- or DC-application*
  • .Suitable for three- and single-phase applications
  • .All phase are equipped with bimetal tripping elements
  • .All terminal screws are accessible from the front

Available accessories

  • .Single mounting kit*
  • .Busbar kits *
  • .Terminal shrouds*
  • .Remote trip and remote reset *

* selected devices only

ABB Softstarters – the complete range

PSR — The compact range
The PSR softstarter is the most compact of all the softstarter ranges, thereby making it possible to design compact starting equipments. The system concept with Manual Motor Starters and the PSR provides a far more compact starting solution than for instance a star delta starter. Built-in by-pass reduces the energy loss and makes the connection easier and with only three potentiometers, the set-up couldn’t be any easier. Still, the optimized ramping characteristics will ensure a very smooth start and stop for all applications.

PSS — The flexible range
The PSS softstarter allows both in line and inside delta connection making it a very flexible option. Just as on the PSR softstarter, the few settings make the set-up very easy. Connecting an external current transformer makes it possible to activate the current limit function, which will allow you to keep the current at a pre-set level also when starting heavy duty applications. The PSS softstarter is the ideal solution when looking for a robust solid state starting solution where many starts per hour are required.

PSE — The efficient range

The PSE softstarter is the world’s first compact softstarter with both built-in electronic overload for motor protection and torque control for an excellent control of pumps. The compact design with the most important functionality integrated provides a very efficient starting solution. The illuminated language neutral display and the four button keypad make it easy to take advantage of all the advanced functionality in the softstarter. The display will also provide all the necessary information both during ramping and continuous operation.

PST(B) — The advanced range

The PST(B) softstarter is the most advanced softstarter in the range with almost all imaginable functionality included. All the advanced protections for the motor, the softstarter and the load ensure a trouble free operation. Pre-warnings even allow problems to be detected before the motor needs to be stopped and thereby avoiding unnecessary downtime. The torque control function has been developed and tested together with well known pump manufacturers to ensure the absolutely best possible stop of pumps without water hammering and pressure surges. With the full text LCD display in your own language, pre-programmed application settings and event logging, it couldn’t be easier to set-up and operate. By using the ABB FieldBusPlug, you can decide at any time which bus protocol to use. The fieldbus system will allow you to set-up, control and monitor the softstarter.


ABB Capacitors offer the best technical solution to problems related to low power factor and power quality.

Improve your power quality and reduce your energy costs

As a source of reactive power, ABB Low Voltage Capacitors provide significant improvement of power quality and reduction in energy cost by:

  • • reducing or eliminating expensive utility penalties for low power factor
  • • reducing power losses in cables and transformers
  • • increasing power transmission capacity in cables
  • • increasing available transformer capacity
  • • improving voltage stabilization in long cables