MODEL: OTEC225 - A075N276 | 120/240V SINGLE-PHASE | SERVICE ENTRANCE RATED | NEMA3R ENCLOSURE
Cummins OTEC Transfer Switch - 225A with Microprocessor Control
Expected Availability: Current lead time is 10-12 weeks
- 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 in-phase open or programmed open transition.
- Integral exerciser clock
- Control is prototype-tested to withstand voltage surges per EN 60947-6-1.
- Gold-flashed generator start contacts
Product Overview
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 startup, 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 pushbuttons for ease of operator use. The service entrance transfer switch meets UL 1008 standards for service entrance applications. The switch contains an UL-listed overcurrent disconnect device on the main incoming utility source.
Technical Specifications
- Amperage Rating: 225A
- Voltage: 120/240V Single-Phase
- Control System: Microprocessor control
- Enclosure: NEMA3R (weather-resistant for outdoor or indoor mounting)
- Service Rating: Service Entrance Rated
- Dimensions: 73.6" H × 32.3" W × 19.7" D
- Weight: 580 lbs
DOWNLOADS:
Spec Sheet - OTEC Series Switches- Spec C
Approved Applications
This transfer switch is suitable for emergency, legally required, and optional standby power systems in commercial and light industrial settings.
Key Features
Microprocessor control - Easy-to-use, standard control. LEDs display transfer switch status; pushbuttons allow operator to activate control test, exercise timing and transfer mode.
Overcurrent disconnect device (on SE models) – Square D UL-Listed 489 molded case circuit breaker.
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 - Products are backed by a comprehensive warranty and a worldwide network of distributors with factory-trained service technicians.
Codes and Standards
- UL - UL 1008 Listed with UL 50E Type Cabinets and UL Listed CU-AL terminals.
- NEMA - Compliance with NEMA ICS 10.
- CSA - Certified to CSA 22.2.
- IEEE - Compliance with IEEE 446 for Emergency and Standby Power Applications.
- NFPA - Compliance with NFPA 70, 99, and 110 (Level 1).
- NEC - Suitable for use in Emergency, Legally Required Standby and Critical Power Systems per NEC 700, 701, 702, and 708.
- IEEE - All switches comply with IEEE 446 Recommended Practice for Emergency and Standby Power Systems
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ISO - This transfer switch is designed and manufactured in facilities certified to
ISO9001.