New | Engine Generator Integrated Switchgear

Caterpillar offers standard paralleling solutions, which can be provided in a wide variety of market applications. The Engine Generator Integrated Switchgear (EGIS) product line provides a standard paralleling system (circuit breakers, bus, and controls) using pre-engineered structures in an integrated controls / switchgear lineup. EGIS allows for operating generator sets in pre-configured Emergency Standby, Prime power and Parallel with Utility configurations. The modular EGIS system utilizes the industry proven Caterpillar EMCP 3.S dedicated controller to perform synchronization, power factor control, load sharing, and system monitoring. The user is able to monitor and control the system through an industrial touchscreen HMI.

Technical Summary
ConfigurationFloor Standing modular switchgear paralleling system (Master Breaker Panel for the first 2 gensets, separate structures for up to 8 additional gensets , utility, and load control/distribution)
Modes of OperationEmergency Standby with redundant master control. Utility paralleling, peak shaving, and closed transition to/from Generator Power (with optional utility control panel)
ApplicationLV only (208V - 480V)
Generator Protective Devices
ANSI Protective Devices15/25. 27/59, 81 O/U, 32, 40, 90 (Industrial Grade)
Utility Protective Devices
ANSI Protective Devices(Utility Grade) SR-750 / SEL-351S, 25, 27/59, 81 O/U, 32,47 (Industrial Grade) 15
Environmental Parameters
Control Panel EnclosureNEMA1
Operating Temperature0°C to 55°C
Storage Temperature-20°C to 60°C

  • automatic Start/stop
  • automatic Load And Var Sharing
  • automatic “dead Bus” Coordination
  • automatic Power Factor Control When In Parallel With Utility Power
  • programmable Load Shed / Load Add Functions
  • redundant Master Functionality
  • high Speed Ethernet Supervisory Network
  • networked Engine Communications
  • generator And Utility Protection
  • user-programmable Logic & I/o
  • password Security System To Ensure System Security

Standard Equipment

Master Breaker Panel (MBP) for first 2 gensets
  • With electrically operated generator circuit breakers, lugs or cross-bus, and genset controls
12" Graphical Color Touchscreen display (HMI) Instant Auto Selector Switch
  • Allows user to return system to automatic in the event of a touchscreen failure
Spare inputs and outputs
  • 2 discrete inputs and 3 discrete outputs programmable from the HMI

Optional Equipment

Generator Breaker Panel for 1 or 2 incremental gensets (up to 8 additional gensets)
  • With breaker position indications, circuit breaker control switch, generator controller, and user programmable logic I/O
Utility Breaker Panel
  • With closed transition soft transfer and utility control for 1 LV circuit breaker, utility grade protective relay, utility close lockout switch, breaker position indications, and circuit breaker control switch
Supplemental Hardware Synchronization check relay (ANSI 25 Device)
  • Provides additional discrete synchronization protection
Data Table Interface
  • Accomodates interface with a building management system for monitoring all system parameters via Modbus RTU or TCP
Generator Demand Priority Control
  • Automatically match the on-line generator capacity to the loads, and avoid unnecessary operation of generator sets.
Distribution Breaker Panel Slave
  • With I/O module for control of up to 3 circuit breakers
  • Each slave panel contains 3 distribution breakers



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With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

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