Cummins Automatic Transfer Switches

Integrated Cummins Transfer Switches for Reliable Power Transitions

Cummins Power Generation offers a wide range of automatic transfer switches for seamless transfer of power between the power sources in your application. Included as part of a completely integrated power system, PowerCommand® transfer switches rely on proven technology to deliver fail-safe performance in critical applications.

At Cummins Power Generation, we engineer our transfer switches with flexibility and ease-of-operation in mind. Paired with a PowerCommand generator set, the result is a robust power system capable of ensuring reliable performance while maximizing cost effectiveness.

Technologically Advanced and Designed for Dependability

PowerCommand automatic transfer switches are based on microprocessor control technology, optimizing performance and ease-of-operation. Their robust, high-contact-force design withstands thousands of switching cycles without burning or pitting to provide 100 percent continuous current ratings.

A full line of standard switches is available from 40 to 4,000 amps for the entire range of power systems with common bus communication language. Custom-engineered switches are available to fit unique project requirements.

Major features and capabilities:

  • Withstand and closing ratings up to 200 kA
  • Convenient front-panel display to easily review power and load conditions, make adjustments, review events, and check network status
  • Service entrance configurations to 1000 amps
  • Open, closed or programmed transition transfer
  • Bypass isolation and service entrance configurations
  • Global agency approvals, including: UL 1008, IEC, CSA, NFPA, IEEE, IBC and NEMA ICS 10

Residential Transfer Switches

Residential Transfer Switches

The Cummins Power Generation residential transfer switches are integrated with the Cummins Power Generation residential gensets. These products are Listed to UL 1008, the Standard for Transfer Switch Safety. The switch and generator set combination is specifically designed for a simplified, quicker installation.

When stable utility voltage returns, the transfer switch will automatically switch electrical load from the generator to the utility. No action is required by the home owner.

Cummins residential transfer switches are also available in Service Entrance models. A service entrance version is also UL 1008 listed and makes use of a UL 489 listed circuit breaker.

Model Ampere Rating Transition Type
RA100A 100 Open Transition
RA200A 200 Open Transition
RSS100A 100 Open Transition
RSS200A 200 Open Transition
  • A powerful and economical solenoid drives the mechanism.
  • Independent break-before-make action is common for 2-pole.
  • 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 control wiring.
  • Long-life, high pressure, silver alloy contacts resist burning and pitting.
    Contacts are mechanically held in both normal and emergency positions for reliable, quiet operation.
  • RA Series Transfer Switch and Service Entrance Transfer Switch NAS-5810-EN
  • RSS Service Entrance Transfer Switch a-1536
  • RSS Transfer Switch a-1535

Warranty and service: Backed by a comprehensive warranty and worldwide distributor network.

OTEC Transfer Switches

OTEC Transfer Wwitches

OTEC transfer switches are designed for operation and switching of electrical loads between primary power and standby generator sets. They are suitable for use in emergency, legally required, and optional standby applications. The switches monitor both power sources, signal generator set start up, automatically transfer power, and return the load to the primary power source once a stable utility is available.

The fully integrated controller is designed for practical functionality, with LED indicators and digital push buttons for ease of operator use.

Features

Easy to service with a wide range of accessories and services available

Model Ampere Rating Transition Type
OTECA 40 – 1200 Open (In-Phase) and Open (Delayed)
OTECB 40 – 1200 Open (In-Phase) and Open (Delayed)
OTECC 40 – 1200 Open (In-Phase) and Open (Delayed)
OTECD 40 – 1200 Open (In-Phase) and Open (Delayed)
OTECE 40 – 1200 Open (In-Phase) and Open (Delayed)
  • Microprocessor control – Easy-to-use, standard control. LEDs display transfer switch status; push buttons allow operator to activate control 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, as recommended by NEMA MG-1 for transfer of inductive loads.
  • Advanced transfer switch mechanism – Unique bi-directional linear actuator provides virtually friction-free, constant force, straight-line transfer switch action during automatic operation.
  • Manual operation – Manual operating handles, shielded termination, and over-center contact mechanisms allow effective manual operation under de-energized conditions.
  • Positive interlocking – Mechanical and electrical interlocking prevent source-to-source connection through the power or control wiring.
  • Main contacts – Heavy-duty 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 service/access – 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: Backed by a comprehensive warranty and worldwide distributor network.