Where closed-transition transfer is required,
coordinate system design requirements with power
supplier.
Delete BP/IS requirements if not applicable. Delete
reference to IEEE Std 602 if not applicable.
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ATS shall be electrically operated and mechanically held in both operating
positions. ATS shall be suitable for use in [emergency systems] [standby
systems] described in NFPA 70. ATS shall be UL listed. ATS shall be
manufactured and tested in accordance with applicable requirements of IEEE
C37.90.1, IEEE C37.13, IEEE C62.41, IEEE Std 602, NEMA ICS 1, NEMA ICS 2,
NEMA ICS 10, Part 2, UL 1008 and UL 1066. ATS shall conform to NFPA 110.
To facilitate maintenance, manufacturer's instruction manual shall provide
typical maximum contact voltage drop readings under specified conditions
for use during periodic maintenance. Manufacturer shall provide
instructions for determination of contact integrity. ATS shall be rated
for continuous duty at specified continuous current rating. ATS shall be
fully compatible and approved for use with BP/IS specified. BP/IS shall be
considered part of ATS system. ATS shall have following characteristics:
a.
Voltage:
[_____] volts [dc] [ac].
b.
Number of Phases:
[One] [Two] [Three].
c.
Number of Wires:
[Two] [Three] [Four].
d.
[25] [50] [60] [400] Hz.
e.
Poles: [Two switched] [Three switched] [and solid neutral] [and
switched neutral] [_____].
f.
ATS WCR: Rated to withstand short-circuit current of [_____]
amperes, RMS symmetrical.
g.
Nonwelding Contacts: Rated for nonwelding of contacts when used
with upstream feeder overcurrent devices shown and with available
fault current specified.
h.
[Main] [Main and Neutral] Contacts: Contacts shall have silver
alloy composition. [Neutral contacts shall have same continuous
current rating as main or phase contacts] [Neutral contact
continuous current rating shall be not less than twice the rating
of main or phase contacts].
2.1.1
Override Time Delay
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NOTE: Consult ATS manufacturers' literature for
feature availability, timing interval range, and
pickup and dropout settings. Insert proper values.
Recommended values for normal applications are shown
in brackets but may be changed for other design
conditions. Where values are not shown or different
settings are required, specify values and settings.
ATS operation should not be initiated during low
SECTION 16410A
Page 9
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