30 S&C Instruction Sheet 515-600
Operational Testing
The testing procedures described in this document should be per formed during initial
startup and thereafter about once per year to verify the source-transfer control and its
associated switch operators are fully functional.
Because Type AS-1A and Type AS-10 Switch Operators may be readily decoupled
from their associated Alduti-Rupter Switches, checkout of functional performance
(e.g., oper ating sequence and timing) of the source-transfer con trol—and the
switch operators—may be accomplished at any convenient time, without requiring an
interruption of service.
STEP 8.
To simulate a loss of source voltage, perform the follow ing:
(a) Decouple each switch operator from its interrupter switch—unless
temporary service interruptions are permissible.
(b) Enable the test keys in the manner described in Step 7 (a), (b), and (f) on page
29.
(c) Place the MANUAL/AUTOMATIC operation selector switch in
Automatic
mode.
Note:
The control
will not
function automatically if one switch operator is coupled and
the other switch operator is decoupled. As a point of information, when operational
testing is performed with the switch operators decoupled, the automatic-transfer
READY indicating lamp
will not
light. (See the
“
Condi tions required to light auto-
matic-transfer READY indicating lamp
”
section on page 32.)
(d)
If the source-transfer control has been programmed for automatic
return or window return
:
(1) Simulate a prolonged loss of preferred-source voltage by pressing
and holding in
the LOSS OF VOLTAGE key for the left source or
right source, as appropriate. The associated source voltage lamp
will extinguish. The key must be held in long enough for the
associated loss-of-source time delay to complete its preset cycle. A
loss-of-source transfer will occur.
(2) Release the LOSS OF VOLTAGE key to simulate a return of the
preferred-source voltage. The associated source voltage lamp will
relight. The return of source transfer will occur automatically after
the return-of-source time delay has completed its preset cycle
●
.
Return will be “open transition” or “closed transition,” depending
on the control settings.
(e)
If the source-transfer control has been programmed for hold return:
(1) Simulate a prolonged loss of preferred-source voltage by pressing
and holding in the LOSS OF VOLTAGE key for the left source or
right source, as appropriate. The associated source voltage lamp
will extinguish. The key must be held in long enough for the
associated loss-of-source time delay to complete its preset cycle.
A loss of source transfer will occur.
(2) Release the LOSS OF VOLTAGE key to simulate a return of the
preferred-source voltage. The associated source voltage lamp will
relight. Wait a sufficient length of time to verify the return of source
transfer does not occur automatically. Then, simulate a loss of
alternate-source voltage by pressing and holding in the LOSS OF
VOLTAGE key for the left source or right source, as appropriate. The
associated source voltage lamp will extin guish. The key must be
held in long enough for the associated loss-of-source time delay to
com plete its preset cycle. A loss of source transfer will occur.
(f) If the
Lockout
option has been factory-selected, proceed to the
“Overcurrent-Lockout Testing” setting on page 31. Otherwise, place the
Loss-of-Source
Testing
●
If the source-transfer control has been programmed for a window return, the return of source transfer is
permitted to occur only if the time of day is within the user-specified time “window .”
