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Products & Services

Automatic Transfer Switch

Low Voltage Automatic Transfer Switch (ATS) UL 1008

IEM’s Automatic Transfer Switch (ATS), equipped with an advanced breaker/ switch transfer pair, provides increased power distribution reliability and reduced maintenance as compared to solenoid-based operators. Integrated electrical overcurrent protection is optionally available within the same footprint. The switching elements can be non-automatic switches or breakers in either 3P or 4P configurations. The ATS is controlled by the Woodward/IEM DTSC/XFER-200, which has an easy to use interface and supports a wide variety of communications and I/O options, including programmable logic capabilities. Our low voltage ATS equipment is’s are rated for emergency applications and suitable for critical and non-critical loads.

  • Current: 3200A max
  • Voltage: 208/240/480/600VAC
  • Short-circuit withstand: 65/85/100/150kA
  • Short-time withstand: 65/85kA
  • Breakers/Switches: Siemens WL 3200AF, 3P/4P
  • Access/Entry: Rear top or bottom
  • Open-, delayed-, or closed-transition operation
  • Automatic or non-automatic (manual) control
  • Seamless integration with IEM LV switchboards and switchgear
  • Optional Service Entrance rating
  • Optional integrated overcurrent protection
  • Optional bypass/Isolation models

Control Features
The DTSC is a premium controller with advanced features, including:

  • Event recorder with time stamping
  • Back-lit LCD display
  • Alarm functions and self-monitoring capabilities
  • Versatile programmable logic capabilities

Standard ATS Control Features
All of the standard user interface / control features detailed in the DTSC/XFER-200 manual plus:

Control Signals, inputs

  • ATS enable/inhibit input
  • Re-transfer inhibit input
  • Closed transition bypass input (if applicable)
  • Standby source transfer request input
  • Standby source inhibit / external load shed input

Control Signals, outputs

  • (1) NO and (1) NC breaker position contacts
  • (1) NO ready for auto contact
  • (1) NO source availability contact for each source
  • (1) NO and (1) NC generator start contacts
  • (1) NO and (1) NC common alarm contacts

Optional ATS Control Features
Functions:

  • Closed transition capability with passive synchronization
  • Automatic active synchronization or soft load transition
  • Power metering with overload alarm and load shed functions

Control Power:

  • Capacitor buffer to maintain local display and comms during transfers
  • Redundant external control power input

Communications:

  • Modbus RTU or TCP interface for monitoring, control, and metering
  • Remote manual/SCADA operation

Control Signals:

  • Standard I/O can be repurposed for custom functions
  • Expandable I/O for additional custom logic/PLC capabilities

Documentation

Product Sheets (PDF)

Low Voltage Automatic Transfer Switch (ATS) UL 1008

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