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Automatic Transfer Bypass-Isolation in Closed Transition and Delayed
Transition Switching. 7A DTB
6
, 7A CTB, 7N DTB
6
, 7N CTB
Notes: 1. Handles extend 3-1/2 inches (89mm).
2. Handles extend 6-1/4 inches (159mm).
3. Recommended clearance to enclosure: 3 feet (914mm) from rear, 4 feet (1219mm) from front (25 inches required for transfer
switch drawout).Side or rear access required.
4. For 4000 amp size, 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).
5. Dimensions for 400 amp, 7A DTB and 7N DTB with neutral code B are 38(965)W x 91(2311)H x 48(1219)H.
6. Conventional switched neutral is provided on 7A DTB and 7N DTB switching arrangements when specified (optional Code B).
7. Specify optional accessory 40HY for 600 amp front - connected arrangement and 40 JY for 800 amps. All service and load
cables limited to top entry only.
Depth
inches (mm)
Height
inches (mm)
Width
inches (mm)
Poles
Switch Rating
amps
Enclosed UL Type 1
150, 260, 400
1, 5
2, 3 or 3 with neutral A/C 28-1/2 (724) 74 (1880) 19 (483)
600, 800 (Front Connected)
2, 7
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 32 (813)
600, 800, 1000, 1200
2, 3
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 48 (1219)
1600, 2000
2, 3
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 60 (1524)
3000
2, 3
3 or 3 with neutral A/B 38 (965) 91 (2311) 72 (1829)
4000
4
3 or 3 with neutral A/C 96-1/2 (2451) 91 (2311) 72 (1829)
150, 260, 400
1, 5
2 or 3 14-3/4 (375) 61-1/2 (1553) 22-1/4 (565)
150, 260, 400
1, 5
2 or 3 with neutral C 19-3/4 (500) 61-1/2 (1553) 22-1/4 (565)
600, 800, 1000, 1200
2, 3
2, 3 or 3 with neutral B 38 (965) 72 (1829) 38 (965)
1600, 2000
3
, 3000
2, 3
2, 3 or 3 with neutral B 38 (965) 72 (1829) 38 (965)
Automatic Transfer Bypass-Isolation in Closed Transition and
Delayed Transition Switching. 7A DTB, 7A CTB, 7N DTB, 7N CTB
Open*
lb (kg)
Enclosed
lb (kg)
Poles
Switch Rating
amps
150, 260, 400 2 340 (154) 145 (66)
150, 260, 400 3 350 (158) 155 (70)
150, 260, 400 3 with C 360 (163) 165 (75)
600, 800, 1000, 1200 2 1560 (708) 970 (440)
600, 800, 1000, 1200 3 1630 (739) 1040 (472)
600, 800, 1000, 1200 3 with B 1700(771) 1110(503)
1600, 2000 2 2315 (10550) 1435 (651)
1600, 2000 3 2495 (1132) 1685 (764)
1600, 2000 3 with B 2675 (1213) 1935 (878)
3000 3 2730 (1240) 1690 (768)
3000 3 with B 3360 (1525) 1980 (899)
4000 3 6300 (2858) –
4000 3 with C 6900 (3130) –
Shipping Weights
Notes: *Open weights include transfer switch, bypass-isolation switch and control panel.
1600-4000 amp enclosures require ventilation openings, refer to drawings for details.
Export shipments may require a wooden box, contact ASCO for weights and dimensions.
Open Configuration
7000 Series Designed to Fit Anywhere
ASCO
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