Brochures and Data Sheets
30, 70, 100, 125 2 67 (31) 15 (7)
30, 70, 100, 125 3 70 (32) 18 (8)
30, 70, 100, 125 3 with B 73 (33) 21 (10)
150, 200, 230 2 69 (32) 17 (8)
150, 200, 230 3 72 (33) 20 (9)
150, 200, 230 3 with B 75 (34) 23 (11)
260, 400 2 216 (98) 82 (37)
260, 400 3 223 (101) 89 (40)
260, 400 3 with B 230 (105) 102 (46)
600 2 316 (143) 88 (40)
600 3 324 (147) 96 (44)
600 3 with B 332 (151) 104 (47)
800, 1000 2 400 (182) 150 (68)
800, 1000 3 420 (192) 170 (78)
800, 1000 3 with B 446 (203) 196 (90)
1200 2 685 (312) 150 (68)
1200 3 705 (321) 170 (78)
1200 3 with B 731 (333) 196 (90)
1600, 2000 2 1110 (503) 370 (167)
1600, 2000 3 1160 (525) 420 (190)
1600, 2000 3 with B 1210 (548) 470 (213)
2600, 3000 2 1365 (620) 405 (184)
2600, 3000 3 1430 (649) 470 (213)
2600, 3000 3 with B 1495 (679) 535 (243)
4000 2 1969 (893) 1258 (571)
4000 3 2149 (975) 1451 (658)
4000 3 with B 2328 (1056) 1623 (736)
20
2-Position Transfer Switching 4ATS, 4NTS
Notes:
1. Enclosures for 1600 - 4000
amp are free-standing with
removable top, sides, and
back.
2. Consult ASCO for dimen-
sions on enclosures other
than UL type 1.
3. Optional arrangement.
Depth
inches (mm)
Height
inches (mm)
Width
inches (mm)
Poles
Switch Rating
Amps
4000 SERIES DESIGNED TO FIT ANYWHERE*
Enclosed
UL
Type
1
2
30, 70, 100, 125, 150, 200, 230 2, 3 or 3 with neutral A/B 18 (457) 48 (1219) 13 (330)
260, 400 2, 3 or 3 with neutral A/B 24 (610) 56 (1422) 14 (356)
600 2, 3 or 3 with neutral A/B 24 (610) 63 (1600) 17 (432)
800, 1000 2, 3 or 3 with neutral A/B 34 (864) 72 (1829) 20 (508)
1200 2, 3 or 3 with neutral A/B 38 (965) 87 (2210) 23 (584)
1600, 2000
1
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 48 (1219
1600, 2000(front connected)
3
2, 3 or 3 with neutral C 38 (965) 87 (2210) 23 (584)
2600, 3000
1
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 60 (1524)
4000
1
2, 3 or 3 with neutral A/B 60 (1524) 91 (2311) 72 (1829)
Open
Configuration
30, 70, 100, 125,150, 200, 230 2, 3 or 3 with neutral B 10-1/4 (260) 10-1/4 (260) 5-1/2 (140)
260, 400 2, 3 or 3 with neutral B 18-1/2 (470) 25 (635) 8 (203)
600 2, 3 or 3 with neutral B 19 (483) 30 (762) 9-7/8 (251)
800, 1000, 1200 2, 3 or 3 with neutral B 27 (686) 31 (787) 12-7/8 (327)
1600, 2000 2, 3 or 3 with neutral B 33-1/4 (845) 28 (711) 26-1/4 (667)
2600, 3000 2, 3 or 3 with neutral B 33-1/4 (845) 28 (711) 30-3/4 (781)
4000 2, 3 or 3 with neutral B 60 (1524) 70 (1778) 53 (1272)
2-Position Transfer Switching 4ATS, 4NTS
Open
lb (kg)
Enclosed
lb (kg)
Poles
Switch Rating
Amps
Shipping Weights
1
Notes:
1. Open weights include
transfer switch and control
panel. 1200-4000 amp
enclosures require ventila-
tion openings, refer to
drawings for details. Export
shipments may require a
wooden box, contact ASCO
for weights and dimensions.
21
4000 SERIES DESIGNED TO FIT ANYWHERE*
Closed Transition and Delayed Transition Transfer Switching
4ACTS, 4NCTS, 4ADTS, 4NDTS
Notes:
1. Enclosures for 1600 - 4000 amp are free-standing with removable top, sides, and back.
2. Consult ASCO for dimensions on enclosures other than UL type 1.
Depth
inches (mm)
Height
inches (mm)
Width
inches (mm)
Poles
Switch Rating
Amps
Enclosed
UL
Type
1
2
150, 260, 400 2, 3 or 3 with neutral A/B 24 (610) 56 (1422) 14 (356)
600 2, 3 or 3 with neutral A/B 24(610) 63 (1600) 17(432)
800, 1000 2, 3 or 3 with neutral A/B 34 (864) 72 (1829) 20 (508)
1200 2, 3 or 3 with neutral A/B 38 (965) 87 (2210) 23 (584)
1600, 2000
1
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 48 (1219)
1600, 2000(front connected) 2, 3 or 3 with neutral C 38 (965) 87 (2210) 23 (584)
3000
1
2, 3 or 3 with neutral A/B 38 (965) 91 (2311) 60 (1524)
4000
1
2, 3 or 3 with neutral A/C 60 (1524) 91 (2311) 72 (1829)
Open
Configuration
150, 260, 400 2, 3 or 3 with neutral B 18-1/2 (470) 25 (635) 8 (203)
600 2, 3 or 3 with neutral B 19 (483) 30 (762) 9-7/8 (251)
800, 1000, 1200 2, 3 or 3 with neutral B 27 (686) 31 (787) 12-7/8 (327)
1600, 2000 2, 3 or 3 with neutral B 33-1/4 (845) 28 (711) 26-1/4 (667)
2600, 3000 2, 3 or 3 with neutral B 33-1/4 (845) 28 (711) 30-3/4 (781)
4000 2, 3 or 3 with neutral B 60 (1524) 70 (1778) 53 (1272)
Closed Transition and Delayed Transition Transfer Switching
4ACTS, 4NCTS, 4ADTS, 4NDTS
Open*
lb (kg)
Enclosed
lb (kg)
Poles
Switch Rating
Amps
150, 260, 400 2 235 (107) 101 (46)
150, 260, 400 3 242 (110) 108 (49)
150, 260, 400 3 with B 250 (113) 115 (52)
600 2 335 (152) 107 (48)
600 3 343 (156) 115 (52)
600 3 with B 352 (159) 124(56)
800, 1000 2 420 (192) 175 (80)
800, 1000 3 450 (205) 205 (94)
800, 1000 3 with B 480 (219) 235 (108)
1200 2 710 (324) 175 (80)
1200 3 740 (337) 205 (94)
1200 3 with B 770 (351) 235 (108)
1600, 2000 2 1300 (590) 505 (229)
1600, 2000 3 1350 (612) 555 (252)
1600, 2000 3 with B 1400 (635) 605 (274)
2600, 3000 2 1555 (706) 540 (245)
2600, 3000 3 1620 (735) 660 (300)
2600, 3000 3 with B 1685 (765) 725 (329)
4000 2 1969 (893) 1258 (571)
4000 3 2149 (975) 1451 (658)
4000 3 with B 2328 (1056) 1623 (736)
Shipping Weights
Notes:
1. Open weights include transfer switch and control panel. 1200-4000 amp enclosures require ventilation openings, refer to drawings for details.
Export shipments may require a wooden box, contact ASCO for weights and dimensions.
* All dimensions and weights shown are approximate and should not be used for construction purposes. Certified dimensions can be furnished
upon request.
Healthcare Facilities
Web Hosting, Internet Data Centers
Commercial Buildings / Industrial Buildings
Telecom Central Offices
Process Manufacturing / Wafer Fabrication Plants /
Distributed Power / Load Management
2
As we become more
dependent on the quality
and reliability of electrical
power, interruption or
complete loss of power can
create serious and even
crippling financial losses, or
impose dangers to life and
safety.
ASCO Power Technologies
(ASCO) provides the solu-
tions to handle the transfer
of critical loads to emer-
gency sources reliably and
with state of the art prod-
ucts. Using ASCO products
can mean the difference
between a minor inconven-
ience and a major catastro-
phe. You’ll find ASCO Power
Transfer Switches wherever
there is a critical load to be
protected.
When flexibility in power
switching is a must, ASCO
offers a variety of product
solutions to meet virtually
every application require-
ment, including distributed
generation applications.
That’s why the 4000 SERIES
is available in open, delayed,
closed and closed soft load
configurations. Additionally,
switched or overlapping
neutral options provide for
reliable operation of ground
fault protection systems and
reduction of voltage tran-
sients from unbalanced load
switching.
ASCO 4000 SERIES
Power Transfer Switches
Critical Loads Demand ASCO
Protecting:
*All dimensions and weights
shown are approximate and
should not be used for
construction purposes.
Certified dimensions can be
furnished upon request.