DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
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TRANSFER TO MAINS
This push button is used to control the closure of the mains load
switching device and has three modes of operation :
1. Synchronising is NOT enabled. Pressing this button when the
generator is running on load and in MANUAL mode, the generator
load switch is opened. After a delay (load transfer time), the mains
load switch is closed. Further presses of this button will have no
effect.
2. Synchronising is enabled. Pressing this button when the generator is
running on load and in MANUAL mode, the 5520 controller will volts
match and synchronise with the mains supply. The generator load
switch is then closed in parallel with the mains supply.
3. Synchronising is enabled. Pressing this button when the generator is
in MANUAL mode and running in parallel with the mains supply will
open the generator load switch, transferring the load back to the
mains supply only.
NOTE:- This button is only active in MANUAL mode.