Brochures and Data Sheets

The ASCO Service Entrance Power Transfer Switch combines
automatic power switching with the necessary disconnecting,
grounding, and bonding required for use as service entrance
equipment. The power transfer switch meets all National Electrical
Code requirements for service entrance use. Transfer switches
generally are installed at facilities that have a single utility feed and
a single emergency power source.
ASCO S
erieS 300SE products use two types of construction.
Products 400 amperes or less, utilize a single enclosure including
a service (utility source) disconnect circuit breaker, as well as the
power transfer switch, grounding and bonding provisions.
Products 600 amperes and above, utilize a multi-section
switchboard construction including a service equipment section
containing the service (utility source) disconnect circuit breaker,
grounding, and bonding provisions. A second section contains
the power transfer switch.
Fig. 16: ASCO S
erieS 300
SE Rated 800 amperes Type
1 enclosure with Service
Entrance Equipment
Fig. 17: ASCO S
erieS 300 SE
rated 200 amperes in Type 1
enclosure with single source
breakers
Product Features:
Suitable for use as service entrance equipment.
Listed to UL 891 (standard for switchboards) for
600 - 3000 amps, sizes and UL 1008 (standard for panel-boards)
for 70 - 400 amps.
Automatic Transfer Switch is listed to UL 1008 for total
system loads
Sizes available from 70 - 3000 amps, 600 VAC, 50 or 60 Hz,
single or three phase
Silver plated copper ground and neutral bus solderless
screw type terminals
Ground fault trip protection provided on sizes 1000 amps
and above
Available with solid or switched neutral
series 300SE Power Transfer Switch
+ +
+ +
+ + +
B
3AUS
4003 N
1 X C +
+ 240 V/60
2 poles,
1Ø
3 poles,
3Ø
A
3
B
3
C
D
E
F
H
J
K
L
M
N
Q
R
1
Insert “X”
If optional
accessories
are required
Product
B
1
Switched
Neutral
Neutral
Code
Phase
Poles
Amperes
Continuous
Rating
Voltage
Code
Controller
11BG
Programmable Engine
Exerciser
14AA/14BA
Auxiliary Contacts
(2 sets)
44G
Strip Heater
w/Thermostat
72A
Serial Module
72E Connectivity
Module
73A Surge Suppres
sor
Optional
Accessories
This
information
is necessary
to allow
correct
control
settings prior
to shipment
Specific
Volt & Freq
Options
Enclosure
Blank Open Type
11CD
115
120
208
220
230
240
380
400
415
440
460
480
575
600
To order an ASCO series 300SE Power Transfer Switch, complete the following catalog number:
Notes: 1. Specify neutral code “C” for 250 and 400 amperes only.
2. Available 70-1000 ampacity. Use Type 3R for 1200-3000 amp applications.
3. 115-120 volt available 150-400 amps only.
4. A solid neutral is standard on 3AUS.
5. For switch sizes 70 - 225 amperes only.
3AUS
70, 100,
150, 200
6
,
225
6
, 250,
400, 600,
800, 1000,
1200, 1600,
2000
2500, 3000
series 300SE Transfer Switch Ordering Information
6. 200, 225 amp rated switch suitable for use with copper cable only.
7. Type 316 Stainless Steel is standard. It provides an improved reduction in corrosion
of salt and some chemicals. It is the preferred choice for marine environments.
8. Available only on switches rated 1200, 2000, 2600, and 3000 Amps.
12
70 - 400 Amp
Construction
600 - 3000 Amp
Construction
Type 1
(Standard)
Type 3R
Type 4
2
Type 4X
Type 12
2
Type 3R
Secure
Type 4
Secure
Type 4X
6
Secure
Double
Door SS
Type 3RX
7,8
Secure
Double
Door SS
C
F
G
L
M
N
H
P
R