ABB

SACE

Air Circuit Breaker (ACB)

Emax 2 ANSI C37 / UL 1066

E4.2H-A

Fixed-type Air Circuit Breaker (ACB)
Check of continuity of internal connnections
Temperature (T)
Mechanical operations counter
Trip operations counter
Total operating time counter
Contact wear indicator
Information on last 30 trips
Information on last 200 events
Date of maintenance operations performed
Indication of maintenance operation needed

3-poles (3P3d)

2500A

2500 AT

2500 AF

Fixed-type
orientable / adjustable rear connections (HR/VR)

85kA (508Vac; UL 1066)
85kA (254Vac; UL 1066)
85kA (635Vac; UL 1066)

Electronic
DIP-switches
Ekip DIP LSI

(L) Protection against overloads
(S) Protection against short-circuits with time delay
(I) Instantaneous protection against short-circuits
Failure of circuit-breaker to open

L (Protection against overload) -- adjustable from 0.4...1 x In (1000A...2500A)
S (Protection against overcurrent with time delay) -- adjustable from 0.6...10 x In (1500A...25000A)
I (Instantaneous protection against overcurrent) -- adjustable from 1.5...15 x In (3750A...37500A)

Earth fault current (RMS)
Currents (RMS)

(ANSI) 49
(ANSI) 51
(ANSI) 50TD
(ANSI) 50
(ANSI) 50BF

8000 operations

20 000 operations

1SDA077909R1

Commercialized

600 V

8015644843328

ANSI C37.13
ANSI C37.16
ANSI C37.17
ANSI C37.50
UL 1066

Efficiency
- Achieving maximum efficiency of an electrical installation requires intelligent management of power supplies and energy use.
- The new technologies used in the SACE Emax 2 circuit breakers allow the productivity and reliability of installations to be optimized and power consumption to be reduced while fully respecting the environment.
- New advanced functionalities (together with Protection trip units and Communication and system devices) contribute to make SACE Emax 2 the circuit breaker that maximizes efficiency in all low-voltage electrical installation.
Control
- SACE Emax 2 circuit breaker is the first single device ready to manage all the dynamics of a low-voltage electrical installation.
- Managing loads in any condition is now possible thanks to Advanced Functionalities such as
- Adaptive load shedding - fast load shedding to guarantee continuity for critical loads during black-outs. Typical scenario is when LV distribution is disconnected from the grid (MV).
- Predictive load shedding - slow load shedding to avoid overloads giving the possibility to modulate loads consumption.
- Power controller - patented algorithm to reduce the peak of power consumed allowing savings on electricity bills.
Managing different power sources and connecting them to main grid is also crucial so that service continuity is maximized.
- Embedded ATS functions - an automatic transfer switch system used in all application where continuity is essential and where there are multi source supplies.
- Synchro-reclosing - Synchronization and automatic reconnection of the Microgrid to the main grid when the power is back.
Emax 2 is able to act as a controller of Main grid condition disconnecting a plant when necessary and also to adapt protection to on-grid or off-grid conditions.
- Interface protection system and Interface Device - Check of Main grid conditions and plant disconnection whenever grid voltage and frequency are out of the ranges.
- Adaptive protection - Network changes recognition and automatic set of thresholds to guarantee protection and coordination in on-grid and off-grid conditions.
Connectivity
- SACE Emax 2 series circuit breakers can be integrated perfectly into all automation and energy management systems to improve productivity and energy consumption and to carry out remote service.
- All circuit breakers can be equipped with communication units for use with Modbus; Profibus; and DeviceNet protocols as well as the modern Modbus TCP; Profinet; EtherNet/IP™ and Open ADR.
- The cartridge-type modules can be easily installed directly on the terminal box even at a later date. Furthermore the integrated IEC61850 communication module enables connection to automation systems widely used in medium voltage power distribution to create intelligent networks (Smart Grids).
- All circuit breaker functions are also accessible via the Internet in complete safety through the Ekip Link switchgear supervision system and the Ekip Control Panel.
- Furthermore with an easy connection thanks to Ekip Com Hub module SACE Emax 2 can be integrated in ABB Ability Electrical Distribution Control System.
- The power and auxiliary connections are optimized to simplify connection to the switchgear.
- The power terminals (which can be oriented horizontally or vertically) have been designed for the most common busbars while the push-in connections of the auxiliaries ensure immediate and safe wiring.
Performance
- The SACE Emax 2 range is made up of 4 sizes - E1.2 / E2.2 / E4.2 / E6.2 (up to 6300A) which enable switchgear of compact dimensions and high ratings to be built with busbars of reduced length and cross-section.
- The protection trip units auxiliary connections and main accessories are the same throughout the range to simplify design and installation. The sizes from E2.2 to E6.2 have the same height and depth.
- The rating levels are updated and standardized throughout the sizes to meet the demands and needs of today’s installations (from 42kA to 150kA) and to standardize switchgear projects.
- High short-time currents together with the efficiency of the protection functions guarantee complete selectivity in all situations.
- Accurate design and choice of materials enable optimization of the overall dimensions of the circuit breaker. In this way switchgear of compact dimensions can be built and outstanding savings at the same performance can be obtained.
- The SACE Emax 2 range is extended also to the UL market up to 5000A. It can be ordered with a triple marking label IEC+UL+CCC.
Ease of use
- The entire range is available in fixed and withdrawable versions; with double insulation between the front of the switchgear and the live parts to ensure operation in complete safety. The circuit breakers can be powered indifferently from above or below.
- All essential information is available in the central area of the front shield and enables immediate identification of the status of the circuit breaker - open / closed / ready to close / charged / discharged springs.
- Maintenance is simple and safe. Thanks to the new front shield design the main accessories can be installed without completely removing it.
- The withdrawable circuit breaker is inserted and removed via dedicated guide rails that simplify movement. The correct movement from racked-in; test isolated; to racked-out position is guaranteed by a lock in each position.
- As a further guarantee of safety the shutters of the fixed part can be locked from the front when the circuit breaker is removed. The shutters of the upper terminals are independent of those of the lower terminals to facilitate checking and maintenance operations.
- The Ekip Touch protection trip units are equipped with a large colour touch-screen display which enables safe and intuitive operation. Furthermore the Ekip units can be programmed and consulted from a tablet / smart phone / portable PC via the Ekip Connect application and all the advanced functionalities can be easily programmed thanks to predefined logic templates.
- The trip units are easily interchangeable from the front of the circuit breaker and all communication units can be installed directly on the terminal box with a few simple operations.
Approvals and certifications
- SACE Emax 2 circuit breakers and their accessories conform to the international IEC 60947 / EN 60947 (harmonized in 30 CENELEC countries) / CEI EN 60947 and IEC 61000 Standards and comply with the following EC directives
- "Low-Voltage Directives" (LVD) no. 2014/35/EU
- "Electromagnetic Compatibility Directive" (EMC) no. 2014/30/EU.
- The ABB air circuit breakers include a range that has been certified according to American UL 1066 Standards. It is also certified by the Russian certification body GOST (Russia Certificate of Conformity) and has achieved China CCC Certification (China Compulsory Certification).
- Certification of conformity with the above-mentioned product Standards is carried out in compliance with the European EN 45011 Standard by the Italian certification body ACAE (Association for the Certification of Electrical Equipment) which is recognized by the European organization LOVAG (Low-Voltage Agreement Group) and by the Swedish Intertek SEMKO certification organization Intertek Semko which is recognized by the international organization IECEE.