Spec Sheet

©2009 Cummins Power Generation. Cummins and PowerCommand are registered trademarks of Cummins Inc.
Specifications are subject to change without notice.
SG-1478j (6/09)
GTEC
Transfer switch
Open transition
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 genset that is
connected to the utility side of the control is the lead
genset. If the lead genset goes down or is taken offline,
the transfer switch starts the second genset and
transfers the load. The control can be programmed to
alternate between the two gensets 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.
All switches meet IEC 60947-6-1 AC31B.
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. LEDs displays transfer switch status;
pushbuttons allow operator to activate control test,
exercise timing and transfer mode.
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 properly disconnected.
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
field-programmable; 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.
40 - 2000 amp