Specifications

Switch Rating Poles Width Height Depth
amps inches (mm) inches (mm) inches (mm)
Automatic Transfer Bypass-Isolation Switching
with Transfer Switch Engaged
7A TB, 7N TB
Notes: 1. Handles extend 3½ inches (89mm).
2. Handles extend 6¼ inches (159mm) standard enclosures for 600 - 800 amp sizes are suitable for top
cable entrance only. Specify 44” wide enclosure for bottom cable entry.
3. Recommended clearance to enclosure: 3 feet (914mm) from rear, 4 feet (1219mm) from front (25
inches required for transfer switch drawout).
4. For 3000 - 4000 amp sizes, ATS and bypass sections can be reversed, contact ASCO. Recommended
clearance to enclosure: 3 feet (914mm) from rear, 5 feet (1524mm) from front (3 feet required for
transfer switch rollout).
Enclosed UL Type 1
150, 260, 400
1
2, 3 or 3 with neutral C 28½ (724) 62 (1575) 19 (483)
600, 800
2
2, 3 or 3 with neutral B/C 36 (914) 90 (2286) 22 (559)
1000, 1200
3
2, 3 or 3 with neutral B/C 38 (965) 91 (2311) 60 (1524)
1600, 2000
3
2, 3 or 3 with neutral B/C 38 (965) 91 (2311) 60 (1524)
3000
4
2, 3 or 3 with neutral C 78 (1981) 91 (2311) 72 (1829)
4000
4
2, 3 or 3 with neutral C 96½ (2451) 91 (2311) 72 (1829)
Open Configuration
150, 260, 400
1
2 or 3 14 ¾ (375) 61½ (1553) 22¼ (565)
150, 260, 400
1
3 with neutral C 19¾ (500) 61½ (1553) 22¼ (565)
600, 800
2
2 or 3 23¾ (603) 67¼ (1708) 24¾ (629)
600, 800
2
2, 3 or 3 with neutral B/C 27¼ (692) 67¼ (1708) 24¾ (629)
1000, 1200
3
2, 3 or 3 with neutral B/C 38 (965) 72 (1829) 38 (965)
1600, 2000
3
2, 3 or 3 with neutral B/C 38 (965) 72 (1829) 38 (965)
150, 260, 400 2 340 (154) 135 (61)
150, 260, 400 3 350 (158) 145 (66)
150, 260, 400 3 with C 360 (163) 155 (70)
600, 800 2 695 (315) 370 (168)
600, 800 3 710 (322) 385 (175)
600, 800 3 with B/C 725(329) 425 (193)
1000, 1200 2 1910 (866) 1280 (507)
1000, 1200 3 2130 (966) 1280 (580)
1000, 1200 3 with B/C 2350 (1066) 1440 (652)
1600, 2000 2 2180 (989) 1300 (589)
1600, 2000 3 2360 (1070) 1550 (702)
1600, 2000 3 with B/C 2540 (1152) 1800 (815)
3000 3 5100 (2314) ----
3000 3 with C 5500 (2495) ----
4000 3 6300 (2858) ----
4000 3 with C 6900 (3130) ----
Notes: * Open widths include transfer switch, bypass-isolation switch and control panel. 1000-4000 amp
enclosures require ventilation openings, refer to drawings for details.
Shipping Weights
Page 19
Automatic Transfer Bypass-Isolation Switching
with Transfer Switch Engaged 7A TB, 7N TB
Switch Rating Poles Enclosed Open*
amps lb (kg) lb (kg)