· Disconnectdevice(breaker,switch,etc)atDGsitedisconnects
the Utility Substation for coordinating wireless
communication among the Utility and its various
generation site(s). In a point-to-multipoint system,
all communication is coordinated through the
DGT-R unit in order to achieve a maximum
distance of 30 miles and communicate with
multiple generation sites.
Generation site for receiving trip signals from
the Utility Substation and sending a wireless
status notification back to the Substation
after a trip operation has been performed. The
disconnect status transmit timing is less than 150
milliseconds.
map data. The DGT-U and the DGT-D control
units constantly transmit and receive an event
(trip status =1) or a no event (no activity = 0) data
between themselves via the DGT-R.
are completely packaged units that include the
appropriate DGT transceivers, power supply,
necessary input and output terminations,
antenna jumper cable and lightning protection
in a weather resistant and lockable NEMA 4
enclosure.
power, wiring to external devices (where
necessary) and external antenna cable. All wiring
connections are made within the enclosure
leaving no connections exposed to environmental
factors. DGT units are designed to be installed in
a wall mount or pole mount configuration.
enable safe and timely Distributed Generator disconnect from the
Utility grid:
· Substationrelaydetectsthefault[2]
· RelaytriggersDGT-UControldeviceatthesubstationtotransfer
distributed generation site [3]
Sequence and timing for isolating a Distributed Generator from a faulted grid.