Bypass isolation contactor-type automatic transfer switch 2000–3000 A FAQs
Q:Can the bypass isolation automatic transfer switch
be serviced while energized? A:Y es. The unique three-door compartmentalized, dual
draw-out design allows service personnel to safely perform concurrent maintenance without disrupting power to the load. Prior to performing maintenance, a technician can electrically isolate the control compartment from system and control voltage by rotating the maintenance isolation switch (MIS). When electrically isolated, the control compartment door can be opened and slid forward (with the adjoining control panel) for easy access to inspect, test or maintain electrical components and wiring. The unique design provides enhanced safety to
the technician while allowing the transfer switch to remain energized.
Q:What transition types
are available?
A:Closed and open transition. The open transition type supports time-delayed, load voltage decay or in-phase via programmable set points.
The closed transition type
can be configured to default
to open transition if source synchronization doesn’t occur after a user-programmable delay timer expires.Q:What amperage ratings
are available?
A:The standard amperage
ratings are 2000, 2600 and
3000—but the transfer switch
can be derated for applications
requiring lower amperages.
Q:Does the bypass switch
operate automatically?
A:Y es. Both the bypass
switch and the ATS operate
automatically.
Q:Is the bypass isolation
automatic transfer switch
UL T 1008 listed?
A:Y es.
Q:What is the UL 1008 short-
circuit withstand/closing
current rating?
A:The short-circuit rating is
100 kA (0.05 sec), up to 600 V.
Q:What is the UL 1008
short-time withstand/closing
current rating?
A:The short-time rating
(optional) is 85 kA (0.5 sec),
up to 600 V.
Q:What is the UL 1008
fuse withstand/closing
current rating?
A:The fuse rating is 200 kA,
up to 600 V.
Q:What modes of operation
does the transfer switch
support?
A:The following operation
modes are standard for both
the ATS and bypass switch:
• Automatic (electrically
initiated, electrically operated)
• Non-automatic (manually
initiated, electrically operated)
• Manual (manually initiated,
manually operated)
initiated under load?
A:Y es. This can be done while in
the automatic, non-automatic or
manual mode of operation.
In automatic mode, a transfer
can be manually initiated via the
controller, remote annunciator or
optional selector switch.
In non-automatic mode,
a transfer can be initiated
using a door-mounted selector
switch or via an optional
tethered remote control.
In manual mode (automatic
controller disabled), a transfer
can be initiated and operated
using integral pushbuttons
located directly on the switch
assembly.
Q:How does the optional,
tethered remote control
function when in non-
automatic mode?
A:A tethered remote control
connects to the transfer switch
via a standard Ethernet cable
and a simple three-pushbutton
control with indication allows
the operator to manually initiate
a transfer at a distance.
Q:Can the ATS and bypass
switch assemblies be drawn
out from their isolated
compartments?
A:Y es. Both the ATS and bypass
switch assemblies can be drawn
out independent of one another
to facilitate inspection, testing,
maintenance or removal.
Q:Can the ATS or bypass
switch be drawn out with the
main contacts closed?
A:No. As a safety precaution,
interlocks will cause the main
contacts to open in advance
of the unloaded ATS or
bypass switch, disengaging
from the electrical bus in the
compartment rear during rack-
out or reengaging the electrical
bus during rack-in.
Eaton is a registered trademark.All other trademarks are property of their respective owners.
Eaton
1000 Eaton Boulevard Cleveland, OH 44122United States Eaton
© 2018 Eaton
All Rights Reserved Printed in USA
Publication No. SA140008EN / Z20846May 2018
Q: Can the ATS or bypass
switch be racked in/racked out with the door closed?
A: Y es. A small racking shutter is provided to facilitate rack-in or rack-out with the door closed using a ½-inch ratchet. Q: When the ATS or bypass switch is drawn out, are energized bus connections exposed?
A: No. Internal shutters (located at the rear of each compartment) are provided and will close to isolate bus connections when the ATS or bypass switch is drawn out from the racked-in position.
Q: Can the ATS be drawn out and isolated from the normal and emergency power sources for routine testing?
A: Y es. With the bypass switch in automatic or non-automatic mode, the ATS can be isolated for test or fully withdrawn for inspection or removal. Should an unplanned outage occur during testing, the bypass switch will automatically transfer to the alternate power source when it is available.
Q: Can the bypass switch be drawn out and isolated from the normal and emergency power sources for routine testing?
A: Y es. With the ATS in automatic or non-automatic mode, the bypass switch can be isolated for test or fully withdrawn for inspection or removal. Should an unplanned outage occur during testing, the ATS will automatically transfer to the alternate power source when it is available.
Q: Can the ATS and bypass switch compartment doors be opened independently of one another?
A: Y es. Independent door action facilitates the routine testing and maintenance of the ATS and bypass switch, ensuring operational readiness and
redundancy for mission-critical applications.
Q: What terminal connection types are supported?
A: For a 2600–3000 A rating, (12) 1/0–750 kcmil Cu/Al mechanical lugs per phase will be provided for the normal, emergency and load connections. For a 2000 A rating, (8) 1/0–750 kcmil are provided.
Optionally, provisions for compression lug and bus connections are available.Q: What enclosure types are available?
A: NEMA T 1 and 3R enclosure types are available.Q: Will the design
accommodate bus duct connections?
A: Y es. Both the NEMA 1 and 3R designs can be engineered to support bus duct flange for the normal, emergency or load connections.
Q: Is the transfer switch seismic qualified?
A: Y es. It is seismic qualified to CBC, IBC, UBC zone 4 and OSHPD pre-approved.
Q: Are floor-anchoring points located internal or external to the transfer switch structure?A: T welve flo
or-anchoring points are located internal to the transfer switch. This minimizes footprint and facilitates integration into an equipment lineup. Q: Is cable ingress limited to top or bottom?
A: Cable entry for the normal connections can be made at the top, and emergency connections can be made at the bottom. Load connections can be made from the top or bottom.A source swap option is
available to reverse cable entry locations for the normal and emergency connections. Q: Does the bypass isolation transfer switch facilitate front access for terminating cables during installation?
A: Y es. A side cabinet option is available providing front access. Otherwise, cable terminations require rear access.
Q: Can the enclosure depth be increased?
A: Y es. The standard depth can be extended (at the rear) to facilitate integration into an equipment lineup or to meet other application requirements. Q: Can the enclosure depth be modified to align with standard switchboard depths for integration?
A: Y es. The depth can be adjusted to align with cross-bus connections in adjoining structures. If one or more cable connections are needed, a side cabinet can be added.
发布评论