Description

The ABB E5EAA HENF105240R1 is a factory-engineered auxiliary and alarm contact module designed exclusively for ABB’s Emax 2 series of air circuit breakers(ACBs).It provides reliable electromechanical signaling of the breaker’s operational state—including main contact position(open/closed)and trip status—via one normally open(NO)auxiliary contact and one NO alarm contact(often interpreted as 1NO+1NC depending on configuration).

Mounted directly onto the Emax 2 breaker frame without tools,the ABB E5EAA enables integration with building management systems(BMS),PLCs,or SCADA networks for remote monitoring,interlocking,and predictive maintenance—critical in data centers,hospitals,and industrial power distribution.

Application Scenarios

In a Tier III data center in Frankfurt,facility managers needed real-time confirmation of main ACB status across 12 redundant power feeds.Installing ABB E5EAA HENF105240R1 modules on each Emax 2 breaker allowed their SCADA system to distinguish between manually opened,closed,and fault-tripped states—preventing erroneous auto-transfer attempts during maintenance.During a utility fault,the system correctly identified a tripped feeder within 200 ms and rerouted load seamlessly.The ABB E5EAA didn’t just signal—it enabled intelligent,fail-safe power resilience.

Parameter

Main Parameters Value/Description

Product Model ABB E5EAA HENF105240R1

Manufacturer ABB Electrification

Product Category Auxiliary&Alarm Contact Module for Air Circuit Breakers

Compatible Breakers ABB Emax 2(E1.3 to E6.3 frame sizes)

Contact Configuration Typically 1NO(auxiliary)+1NO(alarm/trip)—may be wired as NO/NC via terminal jumpers

Rated Insulation Voltage 690 VAC

Thermal Current Rating(Ith)6 A(per contact)

Operating Voltage(Max)415 VAC/250 VDC

Mechanical Life>10,000 operations

Electrical Life>1,000 operations at rated load

Mounting Type Snap-on,tool-free attachment to Emax 2 side flange

Degree of Protection IP20(when mounted on breaker)

Certifications IEC 60947-1/-5,UL 489,CSA,CE

Technical Principles and Innovative Values

Innovation Point 1:Direct Mechanical Coupling

The ABB E5EAA is actuated by the breaker’s internal operating mechanism—not springs or levers—ensuring 100%correlation between contact state and actual breaker position,eliminating false signaling.

Innovation Point 2:Modular&Interchangeable Design

Part of ABB’s“plug-and-signal”ecosystem,it shares the same mounting footprint as shunt trips,undervoltage releases,and communication modules—allowing field upgrades without panel redesign.

Innovation Point 3:Dual-State Awareness

Unlike basic auxiliary switches,the E5EAA provides separate signals for normal open/close and trip due to fault,enabling root-cause analysis in event logs—essential for arc flash mitigation and maintenance planning.

Innovation Point 4:Global Compliance Out of the Box

Pre-certified to major international standards,the module eliminates the need for local re-certification when deployed in multinational infrastructure projects.

Application Cases and Industry Value

At a pharmaceutical plant in Switzerland,regulatory audits required proof of breaker status during batch processing.The ABB E5EAA HENF105240R1 provided tamper-proof digital inputs to the plant historian,satisfying FDA 21 CFR Part 11 requirements for electronic records.No manual logbooks were needed—saving 15 labor hours per week.

In another case,a metro rail power substation in Singapore used E5EAA modules to interlock ACBs with tunnel ventilation systems.If a breaker tripped due to overload,fans automatically activated to clear ionized gases—enhancing personnel safety during maintenance.The solution reduced incident response time by 70%.

Related Product Combination Solutions

ABB Emax 2 E3B–1600A Air Circuit Breaker,base unit for E5EAA

ABB E6EAA–Extended version with 2NO+2NC contacts

ABB PR123/P Trip Unit–Electronic protection relay that works alongside E5EAA for full monitoring

ABB E7X–Communication module(Modbus/Profibus)for digital status reporting

ABB S5N–Shunt trip coil,often installed adjacent to E5EAA for remote disconnection

ABB Ekip Connect–Software platform to validate breaker and accessory health

ABB OT25–Isolator switch with similar signaling options for non-fault applications

Installation,Maintenance,and Full-Cycle Support

Installation is tool-free:align the ABB E5EAA HENF105240R1 with the slot on the left side of the Emax 2 breaker and press until it clicks.Verify contact operation using a multimeter while manually cycling the breaker.Wiring uses screw terminals rated for 0.5–2.5 mm²conductors;torque to 0.6 N·m.

Maintenance is virtually none—no lubrication or adjustment needed.However,during annual breaker maintenance,inspect for contact pitting or housing cracks.Replace if electrical resistance exceeds 100 mΩ.

We supply only genuine ABB E5EAA HENF105240R1 modules,complete with original packaging,conformity declarations,and traceable lot codes.Each unit is tested for contact continuity and mechanical engagement.Backed by 24-month warranty and full ABB lifecycle support.

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