ATS-380
Automatic Transfer Switch
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5
Feature 5 : All Phase Under / Over voltage
Sensing
The controller monitors the voltage of each phase of
the normal and standby power source. User
adjustable settings are provided. ( Refer to program
line 9,10,11,15,16 & 17.)
Adjustable Over voltage range: 390VAC ~ 480VAC
Adjustable Under voltage range: 280VAC ~ 370VAC
Feature 6 : Under/Over frequency Sensing
The controller monitors the frequency of the normal
and standby power source. User adjustable settings
are provided. ( Refer to program line 12,13,14,18,19
& 20.)
Adjustable Over frequency range : 51Hz ~ 70Hz
Adjustable Under frequency range : 40Hz ~ 59Hz
Feature 7 : Plant Exerciser
This feature provides for automatic test operation of
the generator. The interval is fixed at once per week
with a specific test day and time. The test period is
also programmable by customer setting. The
ATS-380 control unit permit customer plant engine
test with / without load on a preset period. ( Refer to
program line 21,22,23,25,26,27 & 28.)
Feature 8 : Pre-transfer Signal Output
When the auxiliary contactor was set to be a
pre-transfer signal output. The ATS-380 controller
will provide a pre-transfer signal to elevator
controller before transfer the load from one source
to another source with a preset time delay. The
pre-transfer return to normal state after the transfer
is complete. ( Refer to program line 30 & 31.)
Adjustable range : 1 ~ 99 sec.
Feature 9 : Pre-exerciser Signal Output
When the auxiliary contactor was set to be a
pre-exerciser signal output. The ATS-380 controller
will provide a pre-transfer signal output before
exerciser the engine. It is an advance warring to
avoid person damaged before the generator auto
start itself. ( Refer to program line 30 & 32.)
Adjustable range : 1 ~ 99 sec.
Feature 10 : Transfer Fail Alarm Signal
Output
When the auxiliary contactor was set to be a
transfer fail alarm output. The auxiliary contactor
may be wired to an alarm enunciator panel to
indicate problem with the Automatic Transfer
Switch.
An alarm condition will occur if a transfer has been
initiated but it is never completed. This may indicate
that something is wrong with the motor or transfer
mechanism. ( Refer to program line 30 )
NOTICE
The ATS-380 controller provided an aux.
contactor for external signal output only. So,
this contactor just can define to one of the
three features used. (Pre-transfer, Pre-exerciser
or Transfer fail alarm output.)
Feature 11 : Fail Alarm On Display
FAIL on the front panel of the ATS-380 indicates that
a transfer was initiated but never completed. This
can point toward a defective motor, transfer
mechanism or the wrong programming for line
3.When the transfers fail alarm occurred, the ATS
will hold this position until the OFF button is pressed
to reset alarm signal.
NOTE! Normally, MCCB type ATS need longer
running time to complete there cycle, so if line 3 is
set wrong the switch stops before completing it’s
cycle and the ATS-380 will give you a FAIL transfer
Alarm. Make sure the line 3 setting is set right
before checking any other parts of the ATS
mechanism.
