Brochures and Data Sheets

Automatic Transfer Bypass-Isolation Switches
ASCO Automatic Transfer & Bypass-Isolation Switches are
available in open transition, closed transition and delayed
transition designs. The bypass and isolation features allow
the primary automatic transfer switch to be inspected, tested,
and maintained without any interruption of power to the load.
They also provide redundant power transfer in the event the
ATS is disabled or removed from service.
• Available 150 to 4000 Amperes.
• Allows bypass-isolation without load interruption.
• Bypass switch and transfer switch have identical electrical
ratings.
• Heavy duty mechanical interlocks prevent undesirable
operation.
• Bypass contacts carry current only during bypass mode.
• Transfer switch is drawout design for ease of maintenance.
• Bypass and isolation handles are permanently mounted.
The bypass switch has dead front quick-make, quick-break
operation for transferring of loads between live sources.
• Bypass switch is fully rated for use as a manual 3-position
transfer switch.
• Bypass and isolation functions are simple, requiring a total
of two operating handles.
• No toggle switches, push buttons, selector switches or
levers are required for bypass-isolation operation.
• Mechanical indicators show bypass and transfer switch
positions.
• 800 -1200 ampere available in shallow depth, front
connected or rear connected designs.
Fig. 6: Rated
600- 1200 Amps
Transfer Switch Drawout Features (150-4000 Amperes)
• Automatic secondary disconnects
remove all control power as switch is
withdrawn.
• Drawout carriage provides for easy
transfer switch maintenance and/or
removal via commercially available
breaker hoists.
• Optional transfer switch lifting yoke
kit available
• Optional automatic shutters which
close when the transfer switch is
withdrawn to provide bus isolation,
specify accessory 82C.(1600-4000A
only)
Automatic
Secondary
Disconnects
Automatic
Shutters
(optional on
1600-4000amps)
Fig. 9: Bypass-Isolation Transfer
Switch secondary disconnects and
optional automatic shutters.
6
Self
Aligning
Jaws
Fig. 10: Bypass-Isolation
Transfer Switch self
aligning power jaws.
7000 series Power Switching Solutions
Fig. 5: Rated
150-600 Amps
Fig. 7: Rated
800-3000 Amps
Fig. 8: Rated
4000 Amps