I.B. ATS-AG03
Page 7
Effective 7/00
1. Time Delay Normal to Emergency (TDNE)
(Standard)
This option delays the transfer from the normal power
source to the emergency power source in order to over-
ride momentary normal power source outages and/or
fluctuations. Timing begins when the emergency power
source becomes available. It does not affect initiation of
the engine start circuit. Should the normal power source
fail, the engine start contact will immediately close, and if
connected to an engine generator, will initiate an engine
start-up. The timer is user-adjustable from 0 to 1800
seconds. This option can be programmed using the
membrane switch. See section 7.3 for further details
on settings.
2. Time Delay on Engine Starting (TDES) (Standard)
This option is used only where the emergency power
source is an engine generator. It delays initiation of the
engine start circuit in order to override momentary nor-
mal power source outages and/or fluctuations. It does
not affect the transfer switch's ability to transfer from nor-
mal power source to the emergency power source. The
timer is user adjustable from 0 to 120 seconds. This
option can be programmed using the membrane
switch. See section 7.3 for further details on set-
tings.
3. Time Delay Emergency to Normal (TDEN)
(Standard)
This option delays the transfer from the emergency
power source to the normal power source, in order to
allow for stabilization of the normal power source before
the transfer is initiated. Timing begins when the normal
source becomes available. If the emergency power
source fails during timing, the time delay is overridden
and an immediate transfer to the normal power source
will occur. The timer is user-adjustable from 0 to 1800
seconds. This option can be programmed using the
membrane switch. See section 7.3 for further details
on settings.
4. Time Delay for Engine Cool-Off (TDEC) (Standard)
This option enables the generator to run under a no-load
condition after transfer to the normal power source has
been made. Timing begins immediately after the transfer
has been made. The timer is user adjustable from 0 to
1800 seconds. This option is can be programmed
using the membrane switch. See section 7.3 for fur-
ther details on settings.
5. Frequency/Voltage Sensing for Emergency Source
(Standard)
This option enables the microprocessor to constantly
monitor the emergency power source. The microproces-
sor prevents transfer from normal power source to the
emergency power source until the emergency power
source has reached an acceptable operating frequency
and/or voltage. When the transfer switch is connected to
the emergency power source and the emergency power
source is outside the controller frequency or voltage set-
tings, the transfer switch will transfer to the normal power
source, if the normal source is available.
Time Delay Engine Failure (TDEF) (Standard)
This option delays the unnecessary retransfer to the
normal source during any test of the emergency source
due to dips in voltage and/or frequency upon initial load-
ing or changing loads during an emergency source test.
Timing begins when the emergency source voltage
and/or frequency fall outside of the programmed set
points. If the voltage and/or frequency return to their des-
ignated ranges before the TDEF times out, the test will
continue unmolested. If the controller times out, the
transfer switch will transfer to the normal source if the
normal source is available. The timer is user adjustable
from 0 to 6 seconds. This option can be programmed
using the membrane switch. See section 7.3 for fur-
ther details on settings.
12. Indicating Lights (Standard)
12C. Normal Connected (Green)
Indicates that the transfer switch is connected to the
normal source.
12D. Emergency Connected (Red)
Indicates that the transfer switch is connected to the
emergency source.
12G. Normal Available (Amber)
Indicates that the normal source is available and the
voltage and frequency are within the programmed para-
meters.
12H. Emergency Available (Amber)
Indicates that the emergency source is available and the
voltage and frequency are within the programmed para-
meters.
14. Auxiliary Relay Contacts (Standard)
14C. Normal Power Source
This option provides four NO and four NC contacts. The
relay is energized only when the normal power source is
available. This option is labeled NRA.
14D. Emergency Power Source
This option provides four NO and four NC contacts. The
