Eaton KG3400 Engine Generator MCCB - UL Listed
Part Number: KG3400
Quick Summary
The Eaton KG3400 Engine Generator MCCB provides rugged overcurrent protection for engine-driven power systems in standby and prime generator sets. In challenging environments, improper protection can lead to nuisance trips or delayed fault clearance, driving unscheduled downtime. This device carries UL Listed, CSA Certified and IEC rated marks with MIL-DTL-17361 compliance, underscoring broad safety and interoperability for industrial gensets. The 600 Vac rating and 400 A current capability align with common generator sizes, while line/load terminals and a configurable shunt trip option simplify installation. By combining proven thermal-magnetic protection with community-standard certifications, it delivers reliable performance, easier maintenance, and predictable total cost of ownership for electrical protection and circuit control applications.
Product Information
Extended Description
KG3400 Eaton: Eaton Series C complete EG molded case circuit breaker, K-frame, KG, Thermal-magnetic trip, 1000-2000A, Three-pole, 400A, 600 Vac, 18 kAIC at 240 Vac, 14 kAIC at 480 Vac, Line/load, Engine generator, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3400
UPC
786679197141
Product Length/Depth
14.75 in
Product Height
6.25 in
Product Width
6.75 in
Product Weight
13.24 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
MIL-DTL-17361
Certifications
UL Listed CSA Certified IEC Rated CSA Std. C22.2 No. 5 IEC 947-2 UL 489 UL Listed file E7819 QPL17361
Catalog Notes
Includes both line and load terminals
Type
Engine generator
Amperage Rating
400 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Shunt trip
12-24 Vac/dc same side with left pigtail shunt
Terminals
Line and load
Frame
K
Frequency rating
60 Hz
Class
Engine generator
Interrupt rating
14 kAIC at 480 Vac 18 kAIC at 240 Vac
Generator rating
144 kVA/116 kW at 240 Vac, 289 kVA/231 kW at 480 Vac, 361 kVA/289 kW at 600 Vac
Number of poles
Three-pole
Trip rating
1000-2000 A
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3400
Feature → Business Impact → Application: The KG3400 is a three-pole, 400 A, 600 Vac molded case circuit breaker (MCCB) with a K-frame, designed for engine-driven power systems. This topology delivers robust short-circuit protection and fast fault clearance, reducing unplanned downtime in commercial and industrial gensets. Application: Ideal for standby or prime generator sets where reliable protection against overloads and faults is critical. Feature → Business Impact → Application: The unit includes line and load terminals inside the enclosure, simplifying wiring and reducing field assembly time. Application: Streamlined installation in generator control panels with minimal terminal wiring—perfect for retrofit projects and new builds alike. Feature → Business Impact → Application: A shunt trip option (12-24 Vac/dc) on the same side with a left pigtail provides remote trip capability, enhancing system safety and control. Application: Critical for remote shutdown scenarios and integrated safety interlocks in engine-generator facilities. Feature → Business Impact → Application: The KG3400 carries UL Listed, CSA Certified, IEC Rated, and MIL-DTL-17361 compliance, ensuring worldwide safety, compliance, and interoperability. Application: Facilitates multi-region deployments and simplifies procurement for regulated environments. Feature → Business Impact → Application: With 14 kAIC at 480 Vac and 18 kAIC at 240 Vac interrupt ratings, it tolerates high fault currents common in industrial power systems. Application: Suitable for medium-sized generator paralleled distributions and reverse-feed configurations, reducing wiring rework during commissioning.
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FAQs
The KG3400 is a three-pole, 400 A, 600 Vac molded case circuit breaker with line-load terminals included. Install it in the generator control panel using correct line-to-load wiring, and connect the optional 12-24 Vac/dc shunt trip on the same side with the left pigtail as required. Follow MIL-DTL-17361, UL, CSA, and IEC guidelines for safe operation and compliant integration into engine-driven power systems.
Key specs include 400 A amperage rating, 600 Vac voltage rating, 60 Hz frequency, three-pole configuration, T268 trip type, and interrupt ratings of 14 kAIC at 480 Vac and 18 kAIC at 240 Vac. It supports reverse feed, line/load terminals, and an optional shunt trip (12-24 Vac/dc) for remote protection, aligning with UL, CSA, IEC standards.
Yes. The KG3400 is specifically rated for 600 Vac operation with 400 A capacity and appropriate interrupt ratings (14 kAIC at 480 Vac and 18 kAIC at 240 Vac). It is designed for engine-generator protection, includes line/load terminals, and supports a shunt trip option, making it suitable for many generator sets and reverse-feed configurations.
KG3400 carries UL Listed and CSA Certified marks, is IEC rated, and complies with MIL-DTL-17361 as part of its overall certification suite. It also aligns with CSA Std. C22.2 No. 5 and UL 489 requirements, supporting global compliance for industrial power protection in engine-generator applications.
The KG3400’s robust thermal-magnetic trip and reliable ratings contribute to reduced downtime and maintenance costs. Regular maintenance includes inspection of terminations, verification of shunt trip operation if installed, and periodic testing of protection functions. The device’s certification coverage and standard line/load terminals simplify compliance and procurement, delivering predictable total cost of ownership in engine-generator protection projects.