Cummins Onan OTPC PowerCommand Automatic Transfer Switch Series: 40 - 4000 Amps, open, closed, or delayed transition

OTPC|Automatic|3 & 4 Poles|40 - 4000 AMPS

Part #:cummins-otpc-automatic-transfer-switch

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OTPC 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 the utility returns and is stabilized.

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  • PowerCommand® control
  • A standard, fully featured microprocessor-based control.
  • Software-enabled features, settings and adjustments are available for ease of setup and accuracy.
  • Robust control system design
  • Optically isolated logic inputs and high isolation transformers for AC power inputs provide high-voltage surge protection.
  • Communications capability
  • The transfer switch is capable of communicating with other transfer switches
  • Accessories with a SCADA network or with Cummins Power Generation generators utilizing LonWorks® protocol.
  • Main contacts
  • Heavy-duty silver alloy contacts with separate arcing surfaces and multi-leaf arc chutes are rated for total system transfer including overload interruption.
  • Easy service/access
  • Plug connections, doormounted controls, ample access space for all top and all bottom power connections, and compatible terminal markings.
  • The control is field programmable.
  • Product lines, accessories and services
  • Cummins Power Generation offers a wide range of accessories and services to suit your requirements.
  • Warranty and service
  • Backed by a comprehensive warranty and worldwide distributor network.
    Specifications
  • Voltage rating Transfer switches rated from 40 A through 4000 A are rated up to 600 VAC, 50 or 60 Hz.
  • Arc interruption
  • Multiple leaf arc chutes cool and quench the arcs.
  • Covers prevent interphase flashover and are transparent for visual inspection.
  • Neutral bar A full current-rated neutral bar with lugs is standard on enclosed 3-pole transfer switches.
  • Auxiliary contacts
  • Two contacts (one for each source) are provided for customer use.
  • Wired to terminal block for easy access.
  • Rated at 10A continuous and 250 VAC maximum.
  • Operating temperature -40 °F (-40 °C) to 140 °F (60 °C)
  • Storage temperature -40 °F (-40 °C) to 140 °F (60 °C)
  • Humidity Up to 95% relative, non-condensing
  • Altitude Up to 10,000 ft (3,000 m) without derating
  • Surge withstand ratings
  • Surge-tested for location category B3, per IEEE C 62.41.
  • Testing per IEEE 62.45. Control tested to European Surge Test EN 61000-4-5.
  • Total transfer time (sourceto- source)
  • Will not exceed 6 cycles at 60 Hz with normal voltage applied to the actuator and without programmed transition installed.
  • Manual operation handles
  • Transfer switches rated through 1000 A are equipped with permanently attached operating handles and quick-break, quick-make contact mechanisms suitable for manual operation.
  • Transfer switches over 1000 A are equipped with manual operators for service use only under de-energized conditions.
Residential Use.

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