GTEC Transfer switch Open transition 40 - 2000 amp Description GTEC transfer switches combine reliability and flexibility in a small, economical package for transferring loads between a utility and a generator set, or between two generators. The microprocessor control monitors utility and emergency standby generator power. When utility power fails or is unsatisfactory, the control starts the generator, then transfers the load from the utility to the generator. When stable utility power returns, the switch automatically transfers the load back to the utility. For genset-to-genset applications, the generator set that is connected to the utility side of the control is the lead genset. If the lead generator set goes down or is taken offline, the transfer switch starts the second generator set and transfers the load. The control can be programmed to alternate between the two generator set at a set interval up to 300 hours. The fully integrated controller is designed for practical functionality, with LED indicators and digital push-buttons for ease of operator use. 40-1250 amp switches are third-party certified as meeting IEC 60947-6-1 AC31A. All switches bear the CE mark. 40-1250 amp switches are CCC certified by the China Quality Certification Centre. This transfer switch is designed and manufactured in facilities certified to ISO9001. Features Microprocessor control: Easy-to-use, standard control. LED displays indicate transfer switch status. Pushbuttons allow operator to activate test, exercise timing and transfer mode. Programmed transition: Open transition timing can be adjusted to completely disconnect the load from both sources for a programmed time period. Recommended for inductive loads to prevent nuisance tripping. Advanced transfer switch mechanism: True transfer switch mechanism with break-before-make action. Manual operation: Standard removable handle can be used to manually operate the switch after the power source has been completely disconnected. Multi-voltage rating: The multiple selectable voltage setting is field adjustable, and allows GTEC to be applied to voltage ranging from 110V to 277V without using external transformers. Positive interlocking: Mechanical and electrical interlocking prevent source-to-source connection through the power or control wiring. Main contacts: Silver alloy contacts with multi-leaf arc chutes are rated for 100% load interruption. They require no routine contact maintenance and provide 100% continuous current ratings. Easy to service: Single-plug harness connection and compatible terminal markings simplify servicing. Access space is ample. Door-mounted controls are fieldprogrammable; no tool is required. Complete product line: Cummins Power Generation offers a wide range of equipment, accessories and services to suit virtually any backup power application. Warranty and service: Products are backed by a comprehensive warranty and a worldwide network of distributors with factory-trained service technicians. ©2011 Cummins Power Generation | All rights reserved. Specifications are subject to change without notice Cummins Power Generation and Cummins are registered trademarks of Cummins Inc. “Our energy working for you.” is a trademark of Cummins Power Generation. SG-1478L (8/1

Transfer switch mechanism • A powerful, economical AC solenoid operates GTEC transfer switches. • Independent break-before-make action is used for 2-pole, 3-pole and 4-pole switches. On 4-pole/switched neutral switches, this action prevents the objectionable ground currents and nuisance ground fault tripping that can result from overlapping designs. • A mechanical interlock prevents simultaneous closing of normal and emergency contacts. • Electrical interlocks prevent simultaneous closing signals to normal and emergency contacts and interconnection of normal and emergency sources through the...

Microprocessor control • Simple, easy-to-use control provides transfer switch information and operator controls • LED lamps for source availability and source connected indication, exercise mode, and test mode. LED status lamps also provided for control set-up and configuration • Pushbutton controls for initiating test, overriding time delays and setting exercise time • Field-configurable for open or programmed transition • Integral exerciser clock • Control is prototype-tested to withstand voltage surges per EN 60947-6-1 • Gold-flashed generator start contacts Control functions Time-delay functions...

Electrical performance The transfer switches listed below must be protected by either circuit breakers or fuses. The following WCR ratings are available when protecting the transfer switch with a circuit breaker or fuse. Short circuit ratings are stated in symmetrical RMS ampere. Fuse protection Transfer switch ampere Overload current (make-break test) Endurance cycles at current (operational performance capability) WCR at 480V max with current limiting fuse KRP-C 3000 amp Class L Fuse type Max fuse, size and type RT16NT-00 63 amp IEC NH Fuse type Circuit breaker protection Transfer switch ampere...

Enclosures The transfer switch and control are mounted in a key-operated locked enclosure. Enclosures meet IEC 60947-6-1 standard. 40-500 amp switches are front-connected. 630-2000 amps are rear-connected. Standard enclosure is grey. Green is available as an option (P152). Cable tie bars are available to relieve stress on lugs for switches smaller than 500 amps. Dimensions: IP32 Amp rating 40, 63 Outline drawing Our energy working for you.™ www.cumminspower.com ©2011 Cummins Power Generation | All rights reserved. Specifications are subject to change without notice Cummins Power Generation and...

System Options A041 Single phase, 2-wire or 3-wire A042 Three phase, 3-wire or 4-wire Enclosure B004 Open construction: no enclosure - includes automatic transfer switch and controls (1600—2000 amp open construction not available) B901 IP32 general purpose indoor B014 IP54 general purpose outdoor P152 Optional paint colour: Onan green M048 Protective shield Control voltage M033 12V, Genset starting voltage M034 24V, Genset starting voltage Control options J030 Add-on programmable exercisor clock M032 Relay signal module S006 Manual restore switch Battery chargers K001 2 amps, 12/24 volts Pole...