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The
age of technology has increased our dependence on electricity
for everyday activities. Loss of electric power translates
not only into a loss of comfort and convenience, but also
into a loss of profits. The purpose of automatic source transfer
controls (ATCs) is to minimize or eliminate outages by providing
a means of automatically transferring from one source to another.
G&W offers a variety of automatic transfer control (ATC)
packages (Model ATC 101 and ATC 201) that provide customized
features for feeding critical load customers or systems. Typical
installations include hospitals, airports, processing plants,
hotels, and government sites.
ATC requirements vary from installation to installation. Some
emphasize transfer time, others require a standby generator
as an alternate source of power, while still others need SCADA
integration, submersibility, or a small footprint because
of confined space limitations. G&W provides flexible,
custom power solutions, from switchgear to ATC controls.
ATC 101 Control
Features
• User-friendly system interface, minimal training required
• All ATC logic parameters user-configurable
• Generator source settings
• Integral SCADA contacts for ease of automation
• Individual timing delays for source 1 and 2
• Test mode operations
• Selectable paralleling of sources operation
• NEMA 4 Enclosure
• Integral battery test under load conditions
• Battery back-up to AC input power
• Emergency return functionality
Options
• Sequence
of events recorder
• NEMA 4X enclosure
• NEMA 6P enclosure
• Integrated with user-selected RTU or protocol preference
for full SCADA operations
• Faulted Circuit Indicators
For switchgear configurations with unprotected load taps,
three clamp-on style detectors can be provided for downstream
fault indication. The cables from these devices can be wired
into the ATC controls to prevent operating the switchgear
into a downstream fault. Faulted circuit indicators may not
be required for G&W vacuum fault interrupter load tap
ways.
ATC 201 Control
Features
• User selection between primary-selective and bus-tie
• Initial transfer delay timers for source 1 and source
2
• Return transfer selection between delay timer and
time-of-day window
• Sequence of events recorder
• Generator source settings
• Integral SCADA contacts for ease of automation
• Test mode operations
• NEMA 4 enclosure
• Integral battery test under load
• Battery back-up to AC input
• Emergency return function
Options
• NEMA 4X enclosure
• NEMA 6P enclosure
• Integrated with user-selected RTU or protocol preference
for full SCADA operations
• Voltage Sensing
Monitoring of source 1 and source 2 voltage can be done with
digital voltage sensors mounted to the elbow capacitive test
points or with analog voltage sensor resistive devices mounted
to the elbow BIP connections. Alternatively, potential transformers
can provide analog voltage measurements.
• Faulted Circuit Indicators
For switchgear configurations with unprotected load taps,
three clamp-on style detectors can be provided for downstream
fault indication. The cables from these devices can be wired
into the ATC controls to prevent operating the switchgear
into a downstream fault. Faulted circuit indicators may not
be required for G&W vacuum fault interrupter load tap
ways.
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